AAT2610
7-Channel PMU for Digital Still Cameras
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General Description
The AAT2610 is a highly integrated power management
solution specifically suited for Digital Still Camera (DSC)
systems, featuring seven DC-DC switching regulators for
maximum operating efficiency.
The input operating voltage range is 1.6 to 5.5V, making
the device an ideal solution for 1-cell Li-ion batteries,
2-cell alkaline batteries, and USB and regulated AC-DC
wall adapters. All seven DC-DC switching regulators fea-
ture high efficiency light load operating mode to extend
battery life while in low power standby state.
Three different DC-DC building blocks provide maximum
design flexibility: a boost (step-up) DC-DC controller
with an output voltage range of 3.0V to 5.5V and a cur-
rent mode control buck (step-down) or boost (step-up)
DC-DC controller with an output voltage range of 2.5V to
the step-up converter (SU) output voltage and buck out-
put range of 0.6V to VIN. Dual current mode control syn-
chronous buck regulators provide low voltage, low noise
outputs required for system logic and memory. Output
voltage range is 0.6V to VIN. The Auxiliary 1 boost (step-
up) is ideally suited for LCD backlight and can drive 1-6
white LEDs up to a maximum of 30mA with ±10% accu-
racy. PWM input controls LED dimming across the fre-
quency range from 10% to 100% duty cycle. The inte-
grated OVP and SCF feature protects the device from
open-circuit LED conditions.
The Auxiliary 2 boost (step-up) and Auxiliary 3 buck-
boost (inverting) output provide low noise (≤30mVpp)
+15V and -7.5V outputs for CCD loads. An expensive
transformer is not required.
No external MOSFETs and low profile TQFN55-40L pack-
age are ideal to save space for DSC solution. Integrated,
low RDS(ON) power MOSFETs provide output voltages from
0.6V to 16VDC and an inverting output up to -10V. The
high switching frequency ensures small external filtering
components. Internal compensation is provided for opti-
mum transient performance and minimum application
design effort.
Features
• Input Voltage Range 1.6 to 5.5V
▪ 1-Cell Li-ion, 2-Cell Alkaline
▪ Adapter or USB Inputs
• 7 Channel up to 96% High Efficiency DC/DCs
▪ Adjustable Output
▪ 4 Channel Synchronous Rectification
▪ Light Load Mode for High Efficiency
• <1µA Total Quiescient Current
• Current Mode Control
▪ Fast, Stable Transient Response
▪ No External Compensation
▪ Current Limit for Internal MOSFET Protection
• High Frequency 1.5MHz System Clock
• High Voltage Series LED Driver
▪ 1 to 6 White LEDs
▪ Up to Maximum 30mA LED Current
▪ External Schottky Diode
▪ ±10% Accuracy Current Sink
▪ Integrated OVP
▪ PWM Dimming: 1k to 30kHz, 10 to 100% Duty
Cycle
• Step-Up and Inverting Outputs for CCD
▪ Low Noise Outputs
▪ Transformerless Inverter Output
• Flexible Sequencing Implementation
▪ Independent Enable Control
▪ 10ms Pre-Programmed Buck or Boost Delay
• Integrated Soft-Start
• Over-Voltage and Over-Temperature Protection
• Pb-free TQFN55-40L Package
• Temperature Range: -40°C to +85°C
Applications
• DSCs and DVCs
• MP3 Players
• PMP
AAT2610
7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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Typical Applications
Step-
Up/
Bypass
Control
VSD1
2.5V, 200mA
VSD2
1.8V, 200mA
Step-
Down
Control
Step-
Down
Control
I/O, Control
Osc
(1.5MHz)
OT
FBSD2
LXSD2
PVSD2
FBSD1
LXSD1
PVSD1
/SEQ
LXM
PVM
LXSU
VIN
2.2µH
1.8µH
2.5µH
VSU
4.7µF
0603
59.0kΩ
118kΩ
4.7µF
0603
187kΩ
59.0kΩ
FBM
PV
22µF
0805
FBSU
+VBATT
1 Li-ion
Cell
(3.3V-4. 2V)
+VBATT
+VBATT
VM
3.3V, 150mA
3.3µH4. 7µF
0603
267kΩ
59.0kΩ
SUSD
EN
SU
ENMEN
SD1
EN
SD2
SCF
VSU
5V, 920mA
Step-
Up/
Down
Control
VSU
VAUX_L3
-7.5 V, 20mA
PVL3
FBL3
4.7µH
VREF3
4.7µF/10V
0603
59.0kΩ
732k Ω
Step-Up
Control
LXL3
4.7µH
LXL2
FBL2
VAUX_L2
15V, 20mA
59.0kΩ
1.42MΩ
+VBATT
Step-Up
Control
4.7µH
LXL1
CSL1
OVL1
VAUX_L1
16V, 30mA
59.0kΩ
1.54MΩ
Step-Up
Control
&
Current
Sink
2-4WLED
ENL2 ENL3
ENL1
(Dimming)
PG
SU
4.7µF/25V
0805
432kΩ
59.0kΩ
PVSU
1µF
0603
PVL
PG
M
PG
SD1
PG
SD2
PG
LGND
4.7µF
1µF
1µF
1µF
1µ F/25V
0603
+VBATT
1. Single Cell Li-ion Battery Input, 5V Motor.
AAT2610
7-Channel PMU for Digital Still Cameras
PRODUCT DATASHEET Gill Sans MT Bold Italic
15/18, convert to outlines
AAT2610
7-Channel PMU for Digital Still Cameras
PRODUCT DATASHEET Gill Sans MT Bold Italic
15/18, convert to outlines
AAT2610
7-Channel PMU for Digital Still Cameras
PRODUCT DATASHEET Gill Sans MT Bold Italic
15/18, convert to outlines
2610.2009.03.1.4 3
www.analogictech.com
AAT2610
7-Channel PMU for Digital Still Cameras
PRODUCT DATASHEET Gill Sans MT Bold Italic
15/18, convert to outlines
2610.2009.03.1.4 3
www.analogictech.com
Step-
Up/
Bypass
Control
VSD1
2.5V, 200mA
VSD2
1.8V, 200mA
Step-
Down
Control
Step-
Down
Control
I/O, Control
Osc
(1.5MHz)
OT
FBSD2
LXSD2
PVSD2
FBSD1
LXSD1
PVSD1
/SEQ
LXM
PVM
LXSU
VIN
2.2µH
1. 8µH
2.5µH
4.7µF
0603
59.0kΩ
118kΩ
4.7µF
0603
187kΩ
59.0kΩ
FBM
PV
22µF
0805
FBSU
+VBATT
VMAIN
3.3V, 150mA
2.2µH
22µF
0805
267kΩ
59.0kΩ
SUSD
SCF
VSU
5V, 800mA
Step-
Up/
Down
Control
VAUX_L3
-7.5V, 20mA
PVL3
FBL3
4.7µ H
VREF3
4.7µF/10V
0603
59.0kΩ
732kΩ
Step-Up
Control
LXL3
4.7µH
LXL2
FBL2
VAUX_L2
15V, 20mA
59.0kΩ
1.42MΩ
+VBATT
Step-Up
Control
4.7µH
LXL1
CSL1
OVL1
VAUX_L1
16V, 30mA
59.0kΩ
1.54MΩ
Step-Up
Control
&
Current
Sink
2-4WLED
ENL3ENL2
ENL1
(Dimming)
ENSD2ENSD1ENSU ENM
PGSU
4. 7µF/25V
0805
432kΩ
59.0kΩ
PVSU
1µF
0603
PVL
PGMPGSD2PGSD1 PGLGND
4.7µF
1µF
1µF
1µF
2 Alk
Cell
(1.6-3.3V)
2.2µF
0402
+VBATT
VSU
2. Dual Cell Alkaline Battery Input, 5V Motor.
AAT2610
7-Channel PMU for Digital Still Cameras
PRODUCT DATASHEET Gill Sans MT Bold Italic
15/18, convert to outlines
4 2610.2009.03.1.4
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AAT2610
7-Channel PMU for Digital Still Cameras
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15/18, convert to outlines
4 2610.2009.03.1.4
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Pin Descriptions
Number Symbol Description
1 FBL2
Auxiliary 2 (AUX_L2) boost converter feedback pin. This pin is high impedance when the AUX2 controller
is disabled. Connect an external resistor divider between this pin and AUX2 output and GND to set the
AUX2 output voltage with 0.6V.
2 FBSD1
Step-down 1 (SD1) buck converter feedback pin. This pin is high impedance when the SD1 controller is
disabled. Connect an external resistor divider between this pin and SD1 output and GND to set the SD1
output voltage with 0.6V.
3 PVSD1 Step-down 1 (SD1) buck converter input pin. Bypass to GND plane with a 1µF ceramic capacitor.
4 LXSD1 Step-down 1 (SD1) buck converter switching node. Connect this pin to an external inductor. This pin is
high impedance when the SD1 converter is disabled.
5 PGSD1 Step-down 1 (SD1) buck converter power ground. Tie this pin to ground plane.
6 PGM Main (SUD) converter power ground. Tie this pin to ground plane.
7 LXM
If is SUSD pulled high, the Main is a boost (step-up) converter and the pin functions as the Main converter
switching node. In this case, connect this pin to the external inductor.
If SUSD is pulled low, the Main is a buck (step-down) converter and the pin functions as the Main converter
switching node. In this case, connect this pin to the external inductor.
In either case, LXM is high impedance when the Main converter is disabled.
8 PVM
If SUSD is pulled high, the Main is a boost (step-up) converter and this pin functions as the Main converter
output. In this case, connect a ceramic capacitor to GND plane from this pin.
If SUSD is pulled low, the Main is a buck (step-down) converter and this pin functions as the Main converter
input voltage. In this case, connect this pin to the external inductor.
9 FBM
Main (M) buck or boost converter feedback pin. This pin is high impedance when the Main controller is
disabled. Connect an external resistor divider between this pin and Main output and GND to set the Main
output voltage with 0.6V.
10 SEQ
Main (M) converter open-drain output sequencing pin. This pin is internally pulled low after both SD1 and
SD2 converters completed soft-start and achieved output regulation. This pin can provide gate drive to
external P-channel MOSFETs which disconnect the load during start-up. This pin is open-circuit during
shut-down, overload or during OT trip conditions.
11 SUSD
Main converter conguration pin. Tie this pin to high to congure the Main output as a boost (step-up)
converter, or tie this pin to low to congure the Main output as a buck (step-down) converter. This pin
cannot be toggled during operation.
12 ENL3
Auxiliary 3 (AUX_L3) buck-boost (inverting) converter active high enable pin. The AUX_L3 output remains
disabled until 2,048 clock cycles after Step-Up (SU) output has reached regulation. The pin has an inter-
nal 330kΩ pull-down resistor.
13 ENL2
Auxiliary 2 (AUX_L2) boost converter active high enable pin. The AUX_L2 output remains disabled until
2,048 clock cycles after Step-Up (SU) output has reached regulation. The pin has an internal 330kΩ pull-
down resistor.
14 ENL1
Auxiliary 1 (AUX_L1) boost converter active high enable pin. The Main output remains disabled until 2,048
clock cycles after Step-Up (SU) output has reached regulation. The pin has an internal 330kΩ pull-down
resistor. This pin also functions as PWM input for the LED dimming feature. The input PWM frequency is
logic level high and low within 1kHz to 30kHz frequency. PWM dimming input duty cycle (ON-time/TOTAL-
time) range is from 10% to 100%.
15 VIN Input voltage. Tie this pin to the input of step-up (SU).
16 GND Chip ground. Tie this pin to ground plane.
17 PV Power input for the PMIC. Connect this pin directly to the PVSU pin.
18 ENSD2
Step-down 2 (SD2) buck converter active high enable pin. The SD2 output remains disabled until 2,048
clock cycles after Step-Up (SU) output has reached regulation. This pin has an internal 330kΩ pull-down
resistor.
19 ENSD1
Step-down 1 (SD1) buck converter active high enable pin. The SD1 output remains disabled until 2,048
clock cycles after Step-Up (SU) output has reached regulation. This pin has an internal 330kΩ pull-down
resistor.
20 ENM
Main buck or boost converter active high enable pin. However, the Main output remains disabled until
2,048 clock cycles after Step-Up (SU) output has reached regulation. This pin has an internal 330kΩ pull-
down resistor.
21 ENSU Step-up (SU) boost converter active high enable pin. This pin has an internal 330kΩ pull-down resistor.
AAT2610
7-Channel PMU for Digital Still Cameras
PRODUCT DATASHEET Gill Sans MT Bold Italic
15/18, convert to outlines
AAT2610
7-Channel PMU for Digital Still Cameras
PRODUCT DATASHEET Gill Sans MT Bold Italic
15/18, convert to outlines
AAT2610
7-Channel PMU for Digital Still Cameras
PRODUCT DATASHEET Gill Sans MT Bold Italic
15/18, convert to outlines
2610.2009.03.1.4 5
www.analogictech.com
AAT2610
7-Channel PMU for Digital Still Cameras
PRODUCT DATASHEET Gill Sans MT Bold Italic
15/18, convert to outlines
2610.2009.03.1.4 5
www.analogictech.com
Pin Descriptions
Number Symbol Description
22 SCF
Open drain, active low, short circuit ag output. SCF goes open when overload protection or AUX_L1 open
circuit occur during abnormal operation or during startup. SCF can drive P-channel MOSFETs to disconnect
a given output from the load.
23 FBSU
Step-up (SU) boost converter feedback pin. This pin is high impedance when the SU controller is disabled.
Connect an external resistor divider between this pin and SU output and GND to set the SU output voltage
with 0.6V.
24 PVSU Step-up (SU) boost converter input.
25 LXSU Step-up (SU) boost converter switching node. Connect this pin to the external inductor and anode of the
Schottky rectifying diode. This pin is high impedance when the SU converter is disabled.
26 PGSU Step-up (SU) boost converter power ground. Tie this pin to ground plane.
27 PGSD2 Step-down 2 (SD2) buck converter power ground pin. Tie this pin to ground plane.
28 LXSD2 Step-down 2 (SD2) buck converter switching node. Connect this pin to an external inductor. This pin is
high impedance when the SD2 converter is disabled.
29 PVSD2 Step-down 2 (SD2) buck converter input pin. Bypass this pin to GND plane with a 1µF ceramic capacitor.
30 FBSD2
Step-down 2 (SD2) buck converter feedback pin. This pin is high impedance when the SD2 controller is
disabled. Connect an external resistor divider between this pin and SD2 output and GND to set the SD2
output voltage with 0.6V.
31 VREF3 Auxiliary 3 (AUX_L3) buck/boost (inverting) reference voltage pin. Bypass VREF3 to GND with a 1µF or
greater capacitor. Connect an external resistor divider between this pin and L3 output and FBL with 0.6V.
32 FBL3
Auxiliary 3 (AUX_L3) boost converter feedback pin. The pin is high impedance when the AUX_L3 control-
ler is disabled. Connect an external resistor divider between this pin and AUX_L3 output and VREF3 pin to
set the AUX_L3 negative buck/boost (inverting) output voltage with 0V.
33 PVL3 Auxiliary 3 (AUX_L3) buck/boost (inverting) input node. Connect this pin to the input ceramic capacitor.
34 LXL3 Auxiliary 3 (AUX_L3) buck/boost (inverting) switching node. Connect this pin to the cathode of the exter-
nal Schottky diode and buck/boost inductor.
35 PVL Power input for auxiliary (AUX_L1, AUX_L2, AUX_L3) channels’ power FET driver. Tie this pin to PVSU.
36 LXL2 Auxiliary 2 (AUX_L2) boost (step-up) switching node. Connect this pin to the anode of the external
Schottky diode and boost inductor.
37 PGL Power ground for auxiliary (AUX_L1, AUX_L2, AUX_L3) channels’ power FET driver. Tie this pin to ground
plane.
38 LXL1 Auxiliary 1 (AUX_L1) boost (step-up) switching node. Connect this pin to the anode of the external
Schottky diode and boost inductor.
39 CSL1
Auxiliary 1 (AUX_L1) boost converter current sink pin. The pin is high impedance when the AUX_L1 con-
troller is disabled. Connect this pin to the cathode of the bottom LED in the string to ensure DC current
ow. Current level is programmed by the internal RSET resistor from 1mA to 30mA.
40 OVL1 Auxiliary 1 (AUX_L1) boost (step-up) over-voltage protection pin. Connect an external resistor divider be-
tween this pin and AUX_L1 output voltage and GND to set the AUX_L1 over-voltage threshold with 0.6V.
EP Exposed pad (bottom). Connect to ground directly beneath the package for thermal dissipation.
AAT2610
7-Channel PMU for Digital Still Cameras
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15/18, convert to outlines
6 2610.2009.03.1.4
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AAT2610
7-Channel PMU for Digital Still Cameras
PRODUCT DATASHEET Gill Sans MT Bold Italic
15/18, convert to outlines
6 2610.2009.03.1.4
www.analogictech.com
Pin Configuration
1
3
2
5
4
6
1
3
2
5
4
6
FBL2
FBSD1
PVSD1
LXSD1
PGSD1
PGM
7
LXM
8
9
PVM
FBM
10
SEQ
30
28
29
26
27
25
FBSD2
PVSD2
LXSD2
PGSD2
PGSU
LXSU
24 PVSU
23
22
FBSU
SCF
21 ENSU
18
16
17
20
19
15
ENM
ENSD1
ENSD2
PV
GND
VIN
14 ENL1
13
12
ENL2
ENL3
11 SUSD
31
33
32
35
34
36
VREF3
FBL3
PVL3
LXL3
PVL
LXL2
37
PGL
38
39
LXL1
CSL1
40
OVL1
Absolute Maximum Ratings1
Symbol Description Value Units
All other pins to GND/PGND -0.3 to 6.0 V
Voltage from LXL1, LXL2 to GND/PGND -0.3 to 30.0 V
Voltage from LXL3 to GND/PGND -8.0 to 6.0 V
Operating Junction Temperature Range -40 to 150 °C
Maximum Soldering Temperature (at leads, 10 sec) 300 °C
Thermal Information2
Symbol Description Value Units
PDMaximum Power Dissipation32.0 W
θJA Maximum Thermal Resistance 25.0 °C/W
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions
specified is not implied. Only one Absolute Maximum Rating should be applied at any one time.
2. Mounted on 1.6mm thick FR4 circuit board.
3. Derate 40mW/°C above 2°C ambient temperature
AAT2610
7-Channel PMU for Digital Still Cameras
PRODUCT DATASHEET Gill Sans MT Bold Italic
15/18, convert to outlines
AAT2610
7-Channel PMU for Digital Still Cameras
PRODUCT DATASHEET Gill Sans MT Bold Italic
15/18, convert to outlines
AAT2610
7-Channel PMU for Digital Still Cameras
PRODUCT DATASHEET Gill Sans MT Bold Italic
15/18, convert to outlines
2610.2009.03.1.4 7
www.analogictech.com
AAT2610
7-Channel PMU for Digital Still Cameras
PRODUCT DATASHEET Gill Sans MT Bold Italic
15/18, convert to outlines
2610.2009.03.1.4 7
www.analogictech.com
Electrical Characteristics1
Unless otherwise noted VPVSU = VPVM= VPVSD1 = VPVSD2 = 3.6V, TA =-40°C to +85°C.
Symbol Description Conditions Min Typ Max Units
General
VIN Operating Input Voltage Range ILOAD ≤ Full Load (see Tables 1 and 2) 1.6 5.5 V
ISHDN Shutdown Supply Current EN_SU = EN_M = EN_SD1 = EN_SD2 = 0V,
EN_DL1 = EN_DL2 = EN_DL3 = 0V 0.01 10 µA
IQ
Quiescient Current into PV Pin
with SU Enabled
EN_SU = 3.6V, FBSU = 1.5V (does not include
switching losses) 300 450 µA
Quiescient Current into PV Pin
with SU/SD1/SD2 Enabled
EN_SU = EN_SD1 = EN_SD2 = 3.6V, FBSU =
FBSD1 = FBSD2 = 1.5V, EN_M = EN_DL1 = EN_
DL2 = EN_DL3 = 0V (does not include switching
losses)
600 900 µA
Quiescient Current into PV Pin
with SU/SUD Enabled
EN_SU = EN_M = 3.6V, FBSU = FBSUD = 1.5V,
EN_SD1 = EN_SD2 = EN_DL1 = EN_DL2 = EN_
DL3 = 0 (does not include switching losses)
450 700 µA
Quiescient Current into PV Pin
with
EN_SU = EN_DL1 = 3.6V, FBSU = FBL1 = 1.5V,
EN_M = EN_SD1 = EN_SD2 = EN_DL1 = EN_DL2
= EN_DL3 = 0(does not include switching losses)
400 650 µA
Oscillator
FOSC Oscillator Frequency Range 1.2 1.5 1.8 MHz
SU DC-DC Boost (Step-Up) Converter
VUVLO(SU) SU Under-Voltage Threshold Rising edge 1.6 1.8 2.0 V
VUVLO(SU),HYS
SU Under-Voltage Threshold
Hysteresis Falling edge 400 mV
VOUT(SU) Step-Up Output Voltage Range 3.0 5.5 V
VIN(BP-ENTER) Enter Bypass Mode VIN Rising edge 4.625 4.750 4.900 V
VIN-HYS(BP-EXIT) Exit Bypass Mode - Hysteresis VIN Falling edge 100 112 125 mV
tDELAY
Start-Up Delay of SUSD, SD1,
SD2, AUX_L1, AUX_L2, AUX_
L3 after VSU in Regulation
512 OSC
Cyc
VFBSU FBSU Reference Voltage TA = 25°C 0.585 0.600 0.615 V
IMODE(SU)
SU Light Load Mode Current
Threshold 200 mA
DMAX(SU) Step-Up Maximum Duty Cycle 1.6 ≤ VPVSU ≤ 5.0V, VFBSU = 0.60V 85 95 %
ILEAK(FBSU) FBSU Pin Leakage Current VFBSU = 0.60V -100 0.01 +100 nA
ILEAK(PVSU) PVSU Pin Leakage Current VLXSU = 0V, VPVSU = 5.5V 0.1 5 µA
ILEAK(LXSU) LXSU Pin Leakage Current VLXSU = VOUT(SU) = 5.5V 0.1 5 µA
RDSON
N-Channel 50 mΩ
P-Channel 130 mΩ
ILIMIT N-Channel Current Limit 4.1 5.5 A
IOFF P-Channel Turn-Off Current 20 mA
ISTARTUP Startup Current Limit VPVSU = 1.8V 1300 mA
TOFF(STARTUP) Startup Off-Time VPVSU = 1.8V 700 ns
FOSC(STARTUP) Startup Frequency VPVSU = 1.8V 200 kHz
1. The AAT2610 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-
tion with statistical process controls.
AAT2610
7-Channel PMU for Digital Still Cameras
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15/18, convert to outlines
8 2610.2009.03.1.4
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AAT2610
7-Channel PMU for Digital Still Cameras
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15/18, convert to outlines
8 2610.2009.03.1.4
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Electrical Characteristics1
Unless otherwise noted VPVSU=VPVM= VPVSD1= VPVSD2 =3.6V, TA=-40°C to +85°C.
Symbol Description Conditions Min Typ Max Units
Main DC-DC Buck (Step-Down) or Boost (Step-Up) Converter
VOUT(M)
Main Output Step-Up Voltage Range VSUSD = VPVSU 3.0 5.5 V
Main Output Step-Down Voltage Range VSUSD = GND; VPVM must be greater
than VOUT(M)
1.0 VIN V
VFBM FBM Reference Voltage TA = 25°C 0.585 0.60 0.615 V
ILIMIT(M)
Step-Up Mode Current Limit VSUSD = VPVSU 1.5 1.75 A
Step-Down Mode Current Limit VSUSD = GND 0.7 0.85 A
IMODE(M)
Step-Up Light Load Mode Current
Threshold VSUSD = VPVSU 350 mA
Step-Down Light Load Mode Current
Threshold VSUSD = GND 200 mA
DMAX(M)
Step-Up Maximum Duty Cycle 1.6 ≤ VIN ≤ 5.0V, VSUSD = VPVSU 80 95 %
Step-Down Maximum Duty Cycle 1.6 ≤ VIN ≤ 5.0V, VSUSD = GND 100
ILEAK(FBM) FBM Pin Leakage Current VFBSU = 0.6V -100 0.01 +100 nA
ILEAK(LXM) LXM Pin Leakage Current VLXSU = VOUT(M) = 5.5V 0.1 5 µA
RDSON
N-Channel 75 mΩ
P-Channel 120 mΩ
IOFF(M)
Step-Up Mode N-Channel Turn-Off
Current VSUSD = VPVSU 20
mA
Step-Down Mode N-Channel Turn-Off
Current VSUSD = GND 20
tSOFT-START Soft-Start Interval 2,048 OSC Cyc
TSEQ Sequencing Time Delay SD1/SD2 Regulation to VSEQ(L)
Transition 10,000 OSC Cyc
ILEAK(SEQ) SEQ Pin Leakage Current EN_SU = VPVSU, FBSU = 1.5V 0.1 1 µA
VSEQ(L) SEQ Low Output Voltage 0.1mA into SEQ pin 0.01 0.1 V
SD1/2 DC-DC Step-Down (Buck) Converters
VOUT(SD1/SD2)
SD1/SD2 Step-Down Output Voltage
Range 0.60 VIN V
VFB(SD1/SD2) FBSD1, FBSD2 Reference Voltage TA = 25°C 0.585 0.60 0.615 V
ILIMIT(SD1/SD2) P-Channel Current Limit 0.6 0.7 A
IMODE(SD1/SD2) SD1 Light Load Mode Current Threshold 100 mA
DMAX(SD1/SD2) Maximum Duty Cycle 1.6 ≤ VPVSU ≤ 5.0V, VSD1/2 = 0.60V 100 %
ILEAK(FBSD1/SD2) FBSD1, FBSD2 Pin Leakage Current VFBSD1/SD2 = 0.6V -100 0.01 +100 nA
ILEAK(LXSD1/SD2) LXSD1, LXSD2 Pin Leakage Current VLXSD1/SD2 = 0 to 3.6V 0.1 5 µA
RDSON(SD1)
N-Channel 500 mΩ
P-Channel 650 mΩ
RDSON(SD2)
N-Channel 250 mΩ
P-Channel 450 mΩ
IOFF N-Channel Turn-Off Current 20 mA
TSOFTSTART Soft-Start Interval 2,048 OSC Cyc
1. The AAT2610 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-
tion with statistical process controls.
AAT2610
7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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Electrical Characteristics1
Unless otherwise noted VPVSU=VPVM= VPVSD1= VPVSD2 =3.6V, TA=-40°C to +85°C.
Symbol Description Conditions Min Typ Max Units
AUX L1/L2 DC-DC Boost (Step-Up) Converters
VOUT(AUX_L1/L2)
AUX_L1/L2 Step-Up Output Voltage
Range25.0 20.0 V
ICSL1 CSL1 Current Sink Accuracy TA = 25°C 27.0 30.0 33.0 mA
VFBL2 FBL2 Reference Voltage TA = 25°C 0.585 0.60 0.615 V
VOVL1 OVL1 Reference Voltage TA = 25°C 0.585 0.60 0.615 V
ILIMIT(AUX_L1) N-Channel Current Limit 0.60 0.70 A
ILIMIT(AUX_L2) N -Channel Current Limit 0.60 0.70 A
IMODE(AUX_L1/L2)
AUX_L1/L2 Light Load Mode Current
Threshold 70 mA
DMAX(L1/L2) Maximum Duty Cycle 95 %
ILEAK(FBL2) FBL2 Pin Leakage Current -100 0.01 +100 nA
RDSON(AUX_L1) N-Channel 1000 mΩ
RDSON(AUX_L2) N-Channel 1000 mΩ
TSOFTSTART(AUX_L2) AUX_L2 Soft-Start Interval 2,048 OSC Cyc
AUX L3 DC-DC Buck/Boost (Inverter) Converters
VREF3 REF3 Reference Voltage TA = 25°C, IREF = 20µA 0.585 0.60 0.615 V
VFBL3 FBL3 Inverter Reference Voltage TA = 25°C -0.01 0.00 0.01 V
ILIMIT(AUX_L3) P-Channel Current Limit 1.5 A
IMODE(AUX_L3) SD1 Light Load Mode Current Threshold 100 mA
ILEAK(REF3,FBL3) REF3, FBL3 Pin Leakage Current -100 0.01 +100 nA
RDSON P-Channel 1000 mΩ
tSOFTSTART Soft-Start Interval 2,048 OSC Cyc
Overload Protection
tDELAY(SCF) Overload Fault Delay 100,000 OSC Cyc
ILEAK(SCF) SCF Pin Leakage Current EN_SU = VPVSU, FBSU = 1.5V 0.1 1 µA
VL(SCF) SCF Low Output Voltage 0.1mA into SCF pin 0.01 0.1 V
Thermal Protection
TSD Over-Temperature Shutdown 140 °C
THYS Over-Temperature Shutdown Hysteresis 15 °C
1. The AAT2610 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-
tion with statistical process controls.
2. The Step-Up converter operates in startup mode until this voltage is reached. Do not apply full load current during startup.
AAT2610
7-Channel PMU for Digital Still Cameras
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7-Channel PMU for Digital Still Cameras
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Electrical Characteristics1
Unless otherwise noted VPVSU=VPVM= VPVSD1= VPVSD2 =3.6V, TA=-40°C to +85°C.
Symbol Description Conditions Min Typ Max Units
Logic Inputs
VL(EN_SU) EN_SU Logic Low Threshold
1.1V < VPVSU < 1.8V 0.2 V
1.8V ≤ VPVSU < 2.5V 0.4 V
2.5V ≤ VPVSU < 5.5V 0.5 V
VH(EN_SU) EN_SU Logic High Threshold 1.1V < VPVSU < 1.8V (VPVSU - 0.2) V
1.8V < VPVSU < 5.5V 1.6 V
VEN_x(L), VSUSD(L) EN_x, SUSD Logic Low Threshold 2.7V < VPVSU < 5.5V 0.5 V
VEN_x(H), VSUSD(H) EN_x, SUSD Logic Low Threshold 2.7V < VPVSU < 5.5V 1.6 V
ILEAK(SUSD) SUSD Pin Leakage Current 0.1 1 µA
RENx ENx Input Impedance 330 kΩ
TEN_L1(L) Disable Low Time Dimming state: EN low to LED
Disable; 2.7V < VIN < 5V 2 3 4 µs
TEN_L1(H) Enable High Time Dimming state: EN high to LED
Regulation; 2.7V < VIN <5V 2 3 4 µs
TEN_L1(DIS-L) Disable Low Time
Disables Dimming state: Soft-
start enabled on subsequent EN
transition; 2.7V < VIN < 5V
1000 1200 µs
1. The AAT2610 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-
tion with statistical process controls.
AAT2610
7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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Typical Characteristics
SU Efficiency vs. Output Current
(VSU = 5V; L = 2.2µH; COUT = 22µF)
Output Current (mA)
Efficiency (%)
1000100101
50
55
60
65
70
75
80
85
90
95
100
VBAT = 2.0V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
MSD Efficiency vs. Output Current
(VPVM = VBAT; VMSD= 3.3V; L = 3.3µH; COUT = 4.7µF)
Output Current (mA)
Efficiency (%)
30
110 100 1000
35
40
45
50
55
60
65
70
75
80
85
90
95
100
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
MSU Efficiency vs. Output Current
(VMSU = 3.3V; L = 2.2µH; COUT = 10µF)
Output Current (mA)
Efficiency (%)
110 100 1000
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
VBAT = 2.0V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
SD1 Efficiency vs. Output Current
(VPVSD1 = VBAT; VSD1 = 2.5V; L = 2.2µH; COUT = 10µF)
Output Current (mA)
Efficiency (%)
110 100 1000
50
55
60
65
70
75
80
85
90
95
100
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
SD2 Efficiency vs. Output Current
(VPVSD2 = VBAT; VSD2 = 1.8V; L = 2.2µH; COUT = 4.7µF)
Output Current (mA)
Efficiency (%)
110 100 1000
50
55
60
65
70
75
80
85
90
95
100
VBAT = 2.0V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
SD2 Efficiency vs. Output Current
(VSD2 = 1.2V; L = 2.2µH; COUT = 4.7µF)
Output Current (mA)
Efficiency (%)
110 100 1000
50
55
60
65
70
75
80
85
90
95
VBAT = 2.0V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
AAT2610
7-Channel PMU for Digital Still Cameras
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7-Channel PMU for Digital Still Cameras
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Typical Characteristics
AUX1 Efficiency vs. PWM Duty Cycle
(4 WLEDs; L = 4.7µH; COUT = 1µF; 10kHz PWM Control)
LED Current (mA)
Efficiency (%)
0
10
20
30
40
50
60
70
80
90
0612 18 24 30
VBAT = 2.0V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.6V
VBAT = 4.2V
VBAT = 5.0V
AUX2 Efficiency vs. Output Current
(VAUX2 = +15V; L = 4.7µH; COUT = 4.7µF)
Output Current (mA)
Efficiency (%)
110 100
40
45
50
55
60
65
70
75
80
85
90
VBAT = 2.0V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.6V
VBAT = 4.2V
VBAT = 5.0V
AUX3 Efficiency vs. Output Current
(VAUX3 = -7.5V; L = 4.7µH; COUT = 4.7µF)
Load Current (mA)
Efficiency (%)
110 100
40
45
50
55
60
65
70
75
80
VBAT = 2.0V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.6V
VBAT = 4.2V
VBAT = 5.0V
AUX1 PWM Duty Cycle vs. LED Current
(4 WLEDs; L = 4.7µH; COUT = 1µF; 10kHz PWM Control)
Duty Cycle (%)
LED Current (mA)
020406080 100
0
5
10
15
20
25
30
VBAT = 2.0V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.6V
VBAT = 4.2V
VBAT = 5.0V
SU Load Regulation vs. Output Current
(VSU = 5V; L = 2.2µH; COUT = 22µF)
Load Current (mA)
Load Regulation (%)
0200 400 600 800 1000 1200 1400 1600
-0.050
-0.045
-0.040
-0.035
-0.030
-0.025
-0.020
-0.015
-0.010
-0.005
0.000
0.005
0.010
0.015
0.020
Bypass mode
VBAT = 2.0V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
Main SD Load Regulation vs. Output Current
(VPVM = VBAT; VMSD = 3.3V; L = 3.3µH; COUT = 4.7µF)
Load Current (mA)
Load Regulation (%)
050 100 150 200 250 300 350 400
-0.05
-0.04
-0.03
-0.02
-0.01
0.00
0.01
0.02
0.03
0.04
0.05
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
Dropout Mode
AAT2610
7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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Typical Characteristics
Main SU Load Regulation vs. Output Current
(VMSU = 3.3V; L = 2.2µH; COUT = 10µF)
Load Current (mA)
Load Regulation (%)
050 100 150 200 250 300 350 400
-0.05
-0.04
-0.03
-0.02
-0.01
0.00
0.01
0.02
0.03
0.04
0.05
VBAT = 2.0V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
SD1 Load Regulation vs. Output Current
(VPVSD1 = VBAT; VSD1 = 2.5V: L = 2.2µH; COUT = 10µF)
Load Current (mA)
Load Regulation (%)
050 100 150 200 250 300 350 400
-0.010
-0.008
-0.006
-0.004
-0.002
0.000
0.002
0.004
0.006
0.008
0.010
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
SD2 Load Regulation vs. Output Current
(VPVSD2 = VBAT; VSD2 = 1.8V: L = 2.2µH; COUT = 4.7µF)
Load Current (mA)
Load Regulation (%)
050 100 150 200 250 300 350 400
-0.010
-0.008
-0.006
-0.004
-0.002
0.000
0.002
0.004
0.006
0.008
0.010
VBAT = 2.4V
VBAT = 3.0V
VBAT = 3.6V
VBAT = 4.2V
VBAT = 5.0V
SD2 Load Regulation vs. Output Current
(VSD2 = 1.2V: L = 2.2µH; COUT = 4.7µF)
Load Current (mA)
Load Regulation (%)
050 100 150 200 250 300 350 400
-0.010
-0.008
-0.006
-0.004
-0.002
0.000
0.002
0.004
0.006
0.008
0.010
VBAT = 2.4V
VBAT = 3.0V
VBAT = 3.6V
VBAT = 4.2V
VBAT = 5.0V
AUX2 Load Regulation vs. Output Current
(VAUX2 = +15V; L = 4.7µH; COUT = 4.7µF)
Load Current (mA)
Load Regulation (%)
0102030405060708090 100
-0.010
-0.008
-0.006
-0.004
-0.002
0.000
0.002
0.004
0.006
0.008
0.010 VBAT = 2.0V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.6V
VBAT = 4.2V
VBAT = 5.0V
AUX3 Load Regulation vs. Output Current
(VAUX3 = -7.5V; L = 4.7µH; COUT = 4.7µF)
Load Current (mA)
Load Regulation (%)
010 100
-2.0
-3.0
-1.0
0.0
1.0
2.0
3.0 VBAT = 2.0V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.6V
VBAT = 4.2V
VBAT = 5.0V
AAT2610
7-Channel PMU for Digital Still Cameras
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7-Channel PMU for Digital Still Cameras
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Typical Characteristics
SU Output Ripple
(VBAT = 3.6V; VSU = 5V; COUT = 22µF; 10mA Load)
Time (10µs/div)
LXSU
(5V/div)
IINDUCTOR
(500mA/div)
VSU (AC)
(50mV/div)
0
0
0
SU Output Ripple
(VBAT = 3.6V; VSU = 5V; L = 2.2µH;
COUT = 22µF; 200mA Load)
Time (400ns/div)
LXSU
(5V/div)
IINDUCTOR
(200mA/div)
VSU (AC)
(10mV/div)
0
0
0
Main SU Output Ripple
(VBAT = 2.4V; VMSU = 3.3V; L = 2.2µH;
COUT = 10µF; 10mA Load)
Time (4µs/div)
LXM
(2V/div)
IINDUCTOR
(500mA/div)
VMSU (AC)
(20mV/div)
0
0
0
Main SU Output Ripple
(VBAT = 2.4V; VMSU = 3.3V; L = 2.2µH;
COUT = 10µF; 200mA Load)
Time (400ns/div)
LXM
(5V/div)
IINDUCTOR
(200mA/div)
VMSU
(20mV/div)
0
0
0
Main SD Output Ripple
(VPVM = VBAT = 4.2V; VMSD = 3.3V; L = 3.3µH;
COUT = 4.7µF; 10mA Load)
Time (4µs/div)
LXM
(2V/div)
IINDUCTOR
(200mA/div)
VMSD (AC)
(20mV/div)
0
0
0
Main SD Output Ripple
(VPVM = VBAT = 4.2V; VMSD = 3.3V; L = 3.3µH;
COUT = 4.7µF; 200mA Load)
Time (4µs/div)
LXM
(2V/div)
IINDUCTOR
(200mA/div)
VMSD (AC)
(10mV/div)
0
0
0
AAT2610
7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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Typical Characteristics
SD Output Ripple
(VPSD2 = VBAT = 3.6V; VSD2 = 1.8V; L = 2.2µH;
COUT = 4.7µF; 10mA Load)
Time (2µs/div)
LX
(2V/div)
IINDUCTOR
(200mA/div)
VSD2 (AC)
(20mV/div)
0
0
0
SD Output Ripple
(VPVSD2 = VBAT = 3.6V; VSD2 = 1.8V; L = 2.2µH;
COUT = 4.7µF; 200mA Load)
Time (800ns/div)
LXSD2
(2V/div)
IINDUCTOR
(200mA/div)
VSD2 (AC)
(20mV/div)
0
0
0
AUX1 Output Ripple
(VBAT = 3.6V; COUT = 1µF; L = 4.7µH;
4 WLED with 30mA LED Current)
Time (400ns/div)
LXL1
(10V/div)
IINDUCTOR
(200mA/div)
VAUX1 (AC)
(100mV/div)
0
0
0
AUX2 Output Ripple
(VBAT = 3.6V;
VAUX2 = 15V;
COUT = 4.7µF/25V;
L = 4.7µH; 20mA Load)
Time (400ns/div)
LXL2
(10V/div)
IINDUCTOR
(200mA/div)
VAUX2 (AC)
(20mV/div)
0
0
0
AUX3 Output Ripple
(VBAT = 3.6V;
VAUX3 = -7.5V;
COUT = 4.7µF/10V;
L = 4.7µH; 20mA Load)
Time (400ns/div)
LXL3
(10V/div)
IINDUCTOR
(100mA/div)
VAUX3 (AC)
(10mV/div)
0
0
0
SU Channel Load Transient Response
(VBAT = 3.6V; VSU = 5V; L = 2.2µH; COUT = 22µF;
Transient Slew Rate 0.1A/µs)
Time (40µs/div)
IOUT
(200mA/div)
VSU (AC)
(200mV/div)
200mA
500mA
AAT2610
7-Channel PMU for Digital Still Cameras
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7-Channel PMU for Digital Still Cameras
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Typical Characteristics
Main SD Load Transient Response
(VBAT = VPVM = 3.6V; VMSD = 3.3V; L = 3.3µH;
COUT = 4.7µF; Transient Slew Rate = 0.1A/µs)
Time (40µs/div)
IOUT
(100mA/div)
VMSD
(50mV/div)
100mA
200mA
SD1 Load Transient Response
(VBAT = VPVSD1 = 3.6V; VSD1 = 2.5V; L = 2.2µH;
COUT = 10µF; Transient Slew Rate = 0.1A/µs)
Time (40µs/div)
IOUT
(100mA/div)
VMSD
(50mV/div)
100mA
200mA
SD2 Load Transient Response
(VBAT = VPVSD2 = 3.6V; VSD2 = 1.8V; L = 2.2µH;
COUT = 4.7µF; Transient Slew Rate = 0.1A/µs)
Time (40µs/div)
IOUT
(100mA/div)
VSD2
(50mV/div)
100mA
200mA
AUX2 Load Transient Response
(VBAT = 3.6V; VAUX2 = 15V; L = 4.7µH;
COUT = 4.7µF/25V; Transient Slew Rate = 0.1A/µs)
Time (40µs/div)
IOUT
(10mA/div)
VAUX2
(200mV/div)
1mA
20mA
AUX3 Load Transient Response
(VBAT = VPVL3 = 3.6V; VAUX3 = -7.5V; L = 4.7µH;
COUT = 4.7µF/10V; Transient Slew Rate = 0.1A/µs)
Time (40µs/div)
IOUT
(10mA/div)
VAUX3
(200mV/div)
1mA
20mA
Mininum Start-up Voltage vs. Load Current
(VSU = 5V)
Battery Voltage (V)
SU Load Current (mA)
2.42.22.01.83.23.02.82.63.63.4
400
600
800
1000
1200
1400
1600
1800
2000
AAT2610
7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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7-Channel PMU for Digital Still Cameras
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Typical Characteristics
SU Start-up
(VBAT = 3.6V; VSU = 5V; COUT = 22µF; 1A Load)
Time (200µs/div)
IIN
(2A/div)
EN
(5V/div)
VSU
(5V/div)
LXSU
(5V/div) 0
0
0
0
Line Transient Response
(VBAT = 3.6V to 4.2V; VSU = 5V; L = 2.2µH;
COUT = 22µF; 200mA Load)
Time (1ms/div)
VSU
(100mV/div)
VBAT
(2V/div)
0
0
SU Start-up Sequence
(VBAT = 3.6V; All Seven Channels Enabled;
VSU = 5V; SU = 10mA Load)
Time (200µs/div)
IIN
(1A/div)
EN
(5V/div)
VSU
(5V/div)
LX
(5V/div)
0
0
0
0
AUX1, AUX2, AUX3 Start-up Sequence
(VBAT = 3.6V; AUX1 = 4 WLEDs; VSU = 5V; VAUX2 = 15V;
VAUX3 = -7.5V; AUX2, AUX3 = 10mA Load)
Time (400µs/div)
EN
(5V/div)
VAUX1
(5V/div)
VAUX2
(5V/div)
VAUX3
(5V/div)
0
0
0
0
MSD, SD1, SD2 Startup Sequence
(VBAT = 3.6V; VSU = 5V; VMSD = 3.3V;
VSD2 = 1.8V; 10mA Load)
EN
(5V/div)
VSD1
(2V/div)
VMSD
(2V/div)
VSD2
(2V/div) 0
0
0
0
Time (400µs/div)
MSU, SD1, SD2 Startup Sequence
(VBAT = 1.8V; VSU = 5V; VMSU = 3.3V; VSD1 = 2.5V;
PVSD1 = PVSD2 = PVSU; 10mA Load)
Time (400µs/div)
EN
(2V/div)
VMSU
(2V/div)
VSD1
(2V/div)
VSD2
(2V/div)
0
0
0
0
AAT2610
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Typical Characteristics
Reference Voltage vs. Temperature
Temperature (°C)
Reference Voltage (V)
1.82.2 2.63.0 3.43.8 4.24.6 5.0
0.596
0.597
0.598
0.599
0.600
0.601
0.602
0.603
0.604
-40°C
25°C
85°C
Switching Frequency vs. Temperature
Temperature (°C)
Frequency (MHz)
1.30
1.34
1.38
1.42
1.46
1.50
1.54
1.58
1.62
1.66
1.70
-40020 40 60 80-20
Shutdown Current vs. Input Voltage
Input Voltage (V)
Shutdown Current (uA)
1.82.2 2.63.0 3.43.8 4.24.6 5.0
1.82.6 3.03.4 3.84.2 4.65.0 5.42.2
0.00
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
0.18
0.20
-40°C
25°C
85°C
Input Current vs. Input Voltage
(Only SU Enabled, VSU = 5V, L = 2.2μH, COUT = 22μF)
Battery Voltage (V)
Input Current (mA)
1.02.0 2.53.0 3.54.0 4.55.0 5.51.5
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
-40°C
25°C
85°C
AAT2610
7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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Functional Block Diagram
Step-
Up/
Bypass
Control
Step-
Down
Control
Step-
Down
Control
I/O, Control
Osc
(1.5MHz)
OT
FBSD2
LXSD2
PVSD2
FBSD1
LXSD1
PVSD1
SEQ
LXM
PVM
LXSU
VIN
FBM
PV
FBSU
SUSD
SCF
Step-
Up/
Down
Control
PVL3
FBL3
VREF3
Step-Up
Control
LXL3
LXL2
FBL2
Step-Up
Control
LXL1
CSL1
OVL1
Step-Up
Control
&
Current
Sink
PVSU
PVL
PGSU PGMPGSD2PGSD1PGL GND
ENL3ENL2
ENL1
(Dimming)
ENSD2ENSD1ENSU ENM
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Functional Description
The AAT2610 PMIC is targeted for single cell Li-ion bat-
tery or dual cell Alkaline battery applications. It includes
seven integrated step-up and step-down converters,
including one synchronous step-up converter (SU), two
synchronous step-down converters (SD1, SD2), one
synchronous step-up or step-down converter (Main), two
non-synchronous step-up converters (AUX1, AUX2) and
one non-synchronous buck-boost (inverting) converter
(AUX3).
The SU converter is the key channel. Its output powers
all internal control and reference circuits when the out-
put voltage is above 2.7V. The AUX1 converter is spe-
cially designed for 1 to 6 white LED serial backlight
applications. Its current sink pin (CSL1) is suitable to
control WLED current to up to 30mA. AUX3 is a transfor-
merless inverting converter which controls the internal
P-channel MOSFET to regulate negative voltage.
The AAT2610 uses a fixed-frequency peak current control
architecture. Light load mode is used to enhance light
load efficiency. Compensation is integrated to reduce the
number of external components and achieve excellent
transient response and load and line regulation.
The ideal 1.5MHz switching frequency allows the use of
smaller output filter components for improved power
density, reduced external component size, and optimized
output voltage ripple. The output voltages can be pro-
grammed by an external divider.
The AAT2610 has seven separate enable pins to control
each converter's startup. A 1.4ms startup delay is
employed to guarantee that the key SU converter is
already in regulation and the internal control and the
reference have been normally biased before the other six
converters start up.
Synchronous Step-Up DC to DC Converter
The AAT2610 has one synchronous step-up DC-DC con-
verter. It utilizes internal power MOSFETs to achieve high
efficiency over the full load current range. The external
feedback can program the output voltage between 3.0V
to 5.5V. Its “bypass” mode automatically connects the
input to the output when the input voltage is higher than
the bypass mode threshold. In shutdown, the enable pin
(ENSU) is pulled low, the SU converter output is equal to
the input voltage minus a voltage drop across the para-
sitical body diode, and all other channels are shut down
regardless of their enable setting.
Start-Up
The AAT2610's major control circuitries adopt power
from the SU converter output and do not function at less
than 2.7V. To ensure the PMIC can start up at VIN as low
as 1.8V, the step-up converter employs a startup oscilla-
tor with a typical 200kHz frequency. The startup oscilla-
tor drives the internal N-channel MOSFET at LXSU until
the SU converter output voltage reaches 2.7V, at which
point the current-mode PWM circuitry takes over. A
startup current limit (750mA) and NMOSFET off time
(700ns) decrease the startup inrush current. At low input
voltages, the AAT2610 may have difficulty starting up
with heavy loads.
Under-Voltage Lockout
Independent UVLO (Under-Voltage Lockout) circuitry
guarantees the sufficient input power and proper opera-
tion of all internal circuitry. When input voltage at VIN
rises above 1.8V, the AAT2610 leaves UVLO status and
enters the startup process. Once in regulation, the VIN
power can be as low as 1.6V before the AAT2610 enters
UVLO status.
Bypass Mode
When the SU converter input voltage increases above the
bypass mode threshold (typically 4.75V), the step-up
converter enters “bypass” mode, which automatically
connects the input to the output. In this mode, P-channel
synchronous MOSFET is always ON and N-channel
MOSFET is always off. The output voltage follows input
voltage in the mode and overload protection is disabled.
Synchronous Step-Up /
Step-Down DC to DC Converter
The AAT2610 has one synchronous step-up/step-down
DC-DC converter which is ideally designed for 2AA/Li-ion
applications. The SUSD pin is used to set the operation
mode. When SUSD is set to logic high, the step-up con-
verter setting is selected. N-channel switch transistor
current is sensed for current loop control to regulate the
output over the complete load range; when SUSD is
pulled low, the step-down converter type is set and the
P-channel switch transistor current is sampled for the
current control loop. In both converter types, soft-start
is employed to suppress the startup inrush current and
eliminate the output voltage overshoot.
In shutdown with the enable pin (ENM) pulled low, if the
step-down converter is selected, the converter is forced
into a non-switching state and the output voltage drops
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to zero. When the step-up converter is selected, the out-
put voltage is equal to the input voltage minus a voltage
drop across the parasitical body diode. If true load dis-
connection is required, an external PMOSFET controlled
by SEQ can be adopted.
Synchronous Step-Down
DC to DC Converter
The AAT2610 has two synchronous step-down DC-DC
converters. Their output voltages can be programmed
from 0.6V to VIN by an external resistor divider.
At dropout, the converter’s duty cycle equals 100% and
the output voltage tracks the input voltage minus the
voltage drop across the P-channel MOSFET. At low input
supply voltage, the RDS(ON) of the P-channel MOSFET
increases, and the efficiency of the converter decreases.
The two step-down converters adopt soft-start to elimi-
nate output voltage overshoot when the enable or input
voltage is applied. When the ENSD1 and ENSD2 are
pulled low, the outputs of the two SD converters are
down to zero and its shutdown current is below 1µA.
Non-Synchronous Step-Up and Buck/
Boost (Inverting) DC to DC Converters
Two non-synchronous step-up converters are targeted
for LCD backlight and CCD positive loads. The controllers
regulate the output voltage by modulating the pulse
width of the internal NMOSFET. External schottky diode
and power inductor are required to set up the boost. The
output voltage can be programmed from 5V to 20V by
external divider.
Auxiliary 1 is ideally designed for driving typical 4 serial
white LEDs. The maximum current flowing through the
WLED string is sensed at CSL1 and set to 30mA by the
internal ballast resistor with ±10% accuracy. The industry
standard PWM (Pulse Width Modulation) controlling tech-
nology is adopted to program the WLED current. Applying
a 10% ~100% duty cycle PWM signal with the frequency
range 1kHz to 30kHz at ENL1 can get 2mA to 30mA
WLED current. If an open circuit occurs, the internal
over-voltage protection circuit prevents damage to the
converter within 67ms, then shuts down all channels.
Auxiliary 2 is designed for +15V CCD bias. Soft-start is
adopted to eliminate the output voltage overshoot and
decrease the effect on the input voltage.
Auxiliary 3 is non-synchronous buck-boost (inverting)
DC to DC converter which is targeted for negative CCD
loads with low noise. Soft-start is adopted to limit the
inrush current at startup.
Light Load Mode and
Normal PWM Control
The AAT2610 uses light load mode to enhance the effi-
ciency at light load. In light load mode, if the error
amplifier output signal is lower than a given level at a
certain clock point, the switch pulse is skipped to reduce
dominant switching losses.
In normal PWM mode to the buck converter, the current
through the P-channel (high side) is sensed for current
loop control. The P-channel current limit is used to pre-
vent internal power PMOSFET overstress or damage by
the high power. To the boost converter, the current though
the N-channel (low side) is sensed for the control loop and
its current limit also protects the main MOSFET.
The error amplifier programs the current mode loop for
the necessary peak switch current to force a constant
output voltage for all load and line conditions. The inter-
nal fixed slope compensation is employed to eliminate
the sub-harmonic oscillation and keep regulation stable
when the duty cycle is over 50%.
Fault Protection
Short-Circuit and Overload Protection
When any of the converters’ output voltage is lower than
the programmed value for a certain period of time
(100,000 clock cycles, typically 66.7ms), the central
control circuits treat it as an overload situation; all seven
channels will be turned off and SCF will be pulled low
until the IC is restarted either by SU enable pin (ENSU)
reset or re-application of the input voltage. During over-
load period, the peak current limit prevents the main
switch (NMOSFET of step-up converter and PMOSFET of
step-down converter) from overstress and damage, and
also avoids saturation of the external inductor. For syn-
chronous step-up (SU) channels, overload protection
function is disabled in “bypass” mode.
Over-Temperature Protection
Thermal protection completely disables power MOSFET
switching when internal power dissipation becomes
excessive. Only reference and internal clock are still
active in this condition. Once the over-temperature con-
dition is removed, the output voltages automatically
recover. The junction over-temperature threshold is
140°C with 15°C of hysteresis.
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Application Information
Setting the Output Voltage
Step-Down Converter
An external resistor divider is used to program the step-
down converter's output voltage from 0.6V to VIN.
Resistors R1 and R2 in Figure 1 program the output to
regulate at voltages higher than 0.6V. To limit the bias
current required for the external feedback resistor string
while maintaining good noise immunity, the suggested
value for R2 is 59kΩ. Although a larger value will further
reduce quiescent current, it will also increase the imped-
ance of the feedback node, making it more sensitive to
external noise and interference. Table 1 summarizes the
resistor values for various output voltages with R2 set to
59kΩ.
The AAT2610 has 3 step-down converters: SD1, SD2
and Main SD. The external resistor sets the output volt-
age according to the following equations:
VOUT = 0.6V · 1 +
R1
R2
Table 1 shows the resistor selection for different output
voltage settings. 1% accuracy metal-film resistors are
strongly recommended to get accurate output voltages.
VOUT (V)
R2 = 59kΩ
R1 (kΩ)
1.2 59
1.5 88.7
1.8 118
2.5 187
3.0 237
3.3 267
Table 1: Resistor Select for Step-Down Converter
Output Voltage Setting.
Step-Up Converter
Similar to the step-down converter, the step-up regula-
tors also use an external resistor divider to program the
output voltage. The AAT2610 has 4 step-up converters:
SU, Main SU, AUX1 and AUX2. The equation for external
resistors setting the output voltage is same as for the
step-down converter. Figure 2 shows the synchronous
(SU and Main SU) and non-synchronous (AUX1 and
AUX2) step-up converter application connections. Table
2 shows resistor selection for different output voltage
settings. 1% accuracy metal-film resistors are strongly
recommended to get accurate output voltages.
PG
LX
PV
FB
AAT2610
Step-Down Converter
C1
VIN
L1
C2
R1
187kΩ
R2
59kΩ
VOUT
2.5V
Figure 1: Step-Down Converter with Output Voltage Programmed by External Resistor Divider.
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VOUT (V)
R2 = 59kΩ
R1 (kΩ)
3.3 267
3.8 316
4.2 357
5.0 432
15 1420
Table 2: Resistor Select for Step-up Converter
Output Voltage Setting.
Buck-Boost (Inverting) Converter
The AAT2610 has one inverting converter, AUX3. Figure
3 shows an AUX3 application circuit. Its programmed
output voltage can be set by the following equations:
VOUT = · R1
-0.6V
R2
R1 = · R2
VOUT
-0.6V
REF
LXL3
FBL3
AAT2610
Inverting converter
C2
R1
732kΩ
R2
59kΩ
VOUT
-7.5V
L1
D1
C3
PVL3
C1
VIN
Figure 3: Buck/Boost (Inverting) Converter with
Output Voltage Programmed by External Resistor
Divider.
Inductor Selection
The AAT2610 can utilize small surface mount inductors
due to its fast 1.5MHz switching frequency. Optimized
inductor values for each channel keeps the seven chan-
nels stable, and achieves reduced output voltage ripple
at smaller output capacitor size. See Table 3 for recom-
mended inductors for each channel. A greater inductance
value will allow greater output current capability by
reducing inductor ripple current. Increasing the induc-
tance above 4.7µH will increase size to get enough satu-
ration current rating. The following equations show the
minimum saturation current of the selected inductors.
C2
C1
PG
PV
LX
FB
AAT2610
Synchronous Step-Up Converter
V
IN
R1
432kΩ
R2
59kΩ
V
OUT
5V
L1
C1
PG
LX
FB
AAT2610
Non-Synchronous
Step-Up Converter
C2
R1
1.43MΩ
R2
59kΩ
V
OUT
15V
L1
D1
V
IN
(a) Synchronous step-up converter (b) Non-synchronous step-up converter
Figure 2: Step-Up Converter with Output Voltage Programmed by External Resistor Divider.
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To step-up converter,
IL_SAT >+
IOUT_MAX
1 - D
VIN · D
2 · f · L
Among it,
D = 1 -
VIN
VOUT
To step-down converter,
IL_SAT > IOUT_MAX + (VIN - VOUT) · D
2 · f · L
Among it,
D =
VOUT
VIN
Input and Output Capacitor Selection
Low ESR (equivalent series resistance) capacitors should
be used to minimize output voltage ripple. Multilayer
ceramic capacitors are an excellent choice as they have
extremely low ESR and are available in small footprints.
The following equations show the minimum capacitance
under the required output voltage ripple for step-up and
step-down converters. In actual application, capacitance
usually decreases a lot as its DC bias increases. So when
selected output capacitors, not only calculating the out-
put capacitor minimum values are necessary according
to the equations, but the actual capacitance must be
carefully considered to get expected output voltage rip-
ple. X5R and X7R dielectric materials of ceramic capaci-
tors are preferred for their ability to maintain capaci-
tance over wide voltage and temperature ranges.
To step-up converter,
COUT ≥ D · IOUT
∆VOUT · f
To step-down converter,
COUT ≥ · (1 - D)
VOUT
8 · f2 · L · ∆VOUT
For example, to step-up converter, when VIN = 3.6V, IOUT
= 900mA, and f = 1.5MHz, output ripple requires below
30mV. According to the equation above, the calculated
COUT should be higher than 5.6µF. If use Sumida 22µF/6.3V
0805 ceramic capacitor, its capacitance at 5V DC bias is
8.0µF which can meet the ripple requirements.
Input capacitors for input decoupling should be located
as close as possible to the device to get better input
power filtering effect. Select 1
µ
F to 4.7
µ
F X5R or X7R
ceramic capacitors for the inputs. Table 4 shows sug-
gested capacitor part numbers.
Manufacturer Part Number
Inductance
(µH)
Max DC
Current
(A)
DCR
(mΩ)
Size (mm)
LxWxH Type
Suit for
Channel
Sumida
CDRH4D22/HP 2.2 3.2 35.4 4.5x4.5x2.4 shielded SU
CDRH8D28 2.5 4.5 12 8.3x8.3x3 shielded SU
CDRH2D09
2.5 0.53 120 3.2x3.2x1.0 shielded Main SD, SD1, SD2
2.2 0.60 115 3.2x3.2x1.0 shielded Main SD, SD1, SD2
1.8 0.65 105 3.2x3.2x1.0 shielded SD2
CDRH2D09C 3.3 0.50 139 3.2x3.2x1.0 shielded Main SU
CDRH2D14 4.7 1.0 135 3.2x3.2x1.55 shielded AUX1, AUX2, AUX3
CDRH2D11/HP 4.7 0.75 190 3.2x3.2x1.2 shielded
CDRH2D18/HP 2.2 1.6 48 3.2x3.2x2.0 shielded Main SD, SD1, SD2
CDRH2D18/HP 4.7 1.2 110 3.2x3.2x2.0 shielded AUX1, AUX2, AUX3
Cooper
SD3110 2.2 1.0 149 3.1x3.1x1.0 shielded Main SD, SD1, SD2
SD3110 3.3 0.81 195 3.1x3.1x1.0 shielded Main SU, SD1, SD2
SD3112 4.7 0.80 246 3.1x3.1x1.2 shielded AUX1, AUX2, AUX3
Murata
LQH32PN2R2NN0 2.2 1.6 76 3.2x2.5x1.55 unshielded Main SD, SD1, SD2
LQH32PN3R3NN0 3.3 1.2 120 3.2x2.5x1.55 unshielded Main SU, SD1, SD2
LQH32PN4R7NN0 4.7 1.0 180 3.2x2.5x1.55 unshielded AUX1, AUX2, AUX3
Table 3: Suggested Inductor Selection Information.
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Manufacturer Value (µF) Voltage (V) Case Size Part Number
Channel / Capacitor
Position
Murata
1 25 0603 GRM188R61E105K AUX1 / output
1 10 0603 GRM185R61A105K SD1, SD2, AUX1, AUX2,
AUX3 / input
3.3 10 0603 GRM188R61A335K AUX3 / output
4.7 25 0805 GRM21BR61E475K AUX2 / output
4.7 6.3 0603 GRM188R60J475K SU, Main / input
Main SD, SD1, SD2 / output
10 6.3 0805 GRM219R60J106KE19 Main SU, SD1, SD2
22 6.3 0805 GRM21BR60J226M SU, Main SU / output
Table 4: Suggested Input and Output Capacitor Selection Information.
Output Diode
A Schottky diode is suitable in the three non-synchronous
step-up channels for its low forward voltage and fast
recovery time. 20V rated Schottky diodes are recom-
mended for outputs less than 10V, while 30V rated
Schottky diodes are recommended for outputs greater
than 10V. Table 5 shows suggested diode part numbers.
Using SEQ for Power Sequence
Power sequence delay is designed to connect the loads
to Main channel output after its normal startup. Use the
SEQ output signal to control an external PMOSFET con-
nected between Main output and loads. The SEQ output
is high impedance lasted for 10ms when startup, then
pulled low after both the SD1 and SD2 converters com-
pleted soft-start and achieved output regulation. When
SD1 and SD2 are disabled, SEQ is also pulled low after
10ms when Main channel achieves regulation.
Using SCF for Full-Load Startup
SCF goes high (high impedance, open drain) when over-
load protection occurs. Under normal operation, SCF
pulls low. It can be used to drive a P-channel MOSFET
switch that turns off the load of a selected supply in the
event of an overload. Or, it can remove the load until the
supply reaches regulation, effectively allowing full load
startup.
Thermal Considerations
Thermal design is an important aspect of power manage-
ment IC applications and PCB layout. The AAT2610
TQFN55-40L package can provide up to 2W of power dis-
sipation when it is properly soldered onto a printed circuit
board with thermal vias. The package has a maximum
thermal resistance of 25°C/W. The maximum power dis-
sipation in a given ambient condition can be calculated:
(T
J(MAX) -
T
A
)
P
D(MAX)
= θ
JA
Where:
PD(MAX) = Maximum Power Dissipation (W)
θJA = Package Thermal Resistance (°C/W)
TJ(MAX) = Maximum Device Junction Temperature (°C)
[150°C]
TA = Ambient Temperature (°C)
The power dissipation for the synchronous buck channel
in CCM (Continuous Conduction Mode) can be calculated
by the following equation:
PSyn-BUCK = IOUTBUCK2 · RDS(ON)P · + RDS(ON)N · 1 -
VINBUCK
VOUTBUCK
VINBUCK
VOUTBUCK
Where:
PSyn-BUCK = Synchronous Buck Channel Power Dissipation
IOUTBUCK = Synchronous Buck Channel Output Current
VOUTBUCK = Synchronous Buck Channel Output Voltage
VINBUCK = Synchronous Buck Channel Input Voltage
RDS(ON)x = Synchronous Buck Channel PMOS or NMOS
Drain-Source On Resistance
AAT2610
7-Channel PMU for Digital Still Cameras
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The power dissipation for the synchronous boost channel
in CCM can be calculated by the following equation:
PSyn-BOOST = IINBOOST2 · RDS(ON)P · + RDS(ON)N · 1 -
VINBOOST
VOUTBOOST
VINBOOST
VOUTBOOST
Where:
PSyn-BOOST = Synchronous Boost Channel Power
Dissipation
IINBOOST = Synchronous Boost Channel Input Current
VOUTBOOST = Synchronous Boost Channel Output Voltage
VINBOOST = Synchronous Boost Channel Input Voltage
RDS(ON)x = Synchronous Boost Channel PMOS or NMOS
Drain-Source On Resistance
The power dissipation for the non-synchronous boost
channel can be calculated by the following equation:
PNonsyn-BOOST = IINBOOST2 · RDS(ON)N · 1 - VINBOOST
VOUTBOOST
Where:
PNonsyn-BOOST = Non-Synchronous Boost Channel Power
Dissipation
IINBOOST = Non-Synchronous Boost Channel Input
Current
VOUTBOOST = Non-Synchronous Boost Channel Output
Voltage
VINBOOST = Non-Synchronous Boost Channel Input
Voltage
RDS(ON)N = Non-Synchronous Boost Channel internal
NMOS Drain-Source On Resistance
The power dissipation for the inverting channel in CCM
can be calculated by the following equation:
PNonsyn-BUCKBOOST = IIN-BUCKBOOST2 · RDS(ON)P · VOUT-BUCKBOOST
VIN-BUCKBOOST - VOUT-BUCKBOOST
Where:
PNonsyn-BUCKBOOST = Non-Synchronous Buck/Boost Channel
Power Dissipation
IIN-BUCKBOOST = Non-Synchronous Buck/Boost Channel
Input Current
VOUT-BUCKBOOST = Non-Synchronous Buck/Boost Channel
Output Voltage
VIN-BUCKBOOST = Non-Synchronous Buck/Boost Channel
Input Voltage
RDS(ON)P = Non-Synchronous Buck/Boost Channel inter-
nal PMOS Drain-Source On Resistance
Layout Guidance
When laying out the PC board, the following layout
guideline should be followed to ensure proper operation
of the AAT2610:
1. The exposed pad (EP) must be reliably soldered to
the GND plane for better power dissipation. A PGND
pad below EP is required.
2. The power traces, including the GND trace, the LX
trace and the IN trace should be kept short, direct
and wide to allow large current flow. Each inductor
of the seven channels should be connected to the LX
pins as short as possible. Use several VIA pads when
routing between layers to decrease the conduction
resistance.
3. The input filter capacitor of each channel should con-
nect as closely as possible to IN (Pins 3, 8, 15, 29,
33 and 35) and GND (Pins 5, 6, 26, 27 and 37) to
get good power filtering.
4. Keep the switching node, LX (Pins 4, 7, 25, 29, 34,
36 and 38), away from the sensitive FB node.
5. The feedback trace should be separate from any
power trace and connect as closely as possible to the
load point. Sensing along a high-current load trace
will degrade DC load regulation. The external feed-
back resistors should be placed as closely as possible
to the FB pin (Pin 1, 2, 9, 23, 30, 32 and 40) to
minimize the length of the high impedance feedback
trace.
6. It is recommended to connect the external feedback
resistor divider to the signal ground (Pin 16). The
signal ground and power ground should be con-
nected at a single point to alleviate the power
ground noise affecting the feedback voltage.
7. The resistance of the trace from the load return to
PGND should be kept to a minimum. This will help to
minimize any error in DC regulation due to differ-
ences in the potential of the internal signal ground
and the power ground.
Figure 4 and 5 show the AAT2610 evaluation board lay-
out with 4 layers.
AAT2610
7-Channel PMU for Digital Still Cameras
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7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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Manufacturer Part Number
Rated
Forward
Current (A)
Non-
Repetitive
Peak Surge
Current (A)
Rated
Voltage (V)
Thermal
Resistance
(RθJA, °C/W) Package
ON Semi MBR0530T 0.5 5.5 30 206 SOD-123
MBR0520LT 0.5 5.5 20 206 SOD-123
Diodes BAT42W 0.2 4 30 500 SOD-123
Zetex ZHCS350 0.35 4.2 40 330 SOD-523
Central Semi CMDSH2-3 0.2 1.0 30 500 SOD-323
Table 5: Suggested Schottky Diode Selection Information.
VBAT
VBAT
VBAT
187k
R301
59k
R302
2.2uH
L3
10uF
C302 +2.5 V
VSD1
4.7uH
L6
22uF
C103A
4.7uF
C601
MBR0530
D6
1.42M
R601
59k
R602
4.7uH
L5
4.7uF
C501
VBAT
MBR0530
D5
1uF/25 V
C502
D501
D502
D503
D504
VAUX1
LXL1
JENSU
JENM
JENSD1
JENSD2
JENL1
PVSU
GND
GND
GND
GND
M1
M2
M3
GND
GND
M4
4.7uF
C301
LXSU
GND
4.7uH
L7
MBR0530
D7
PVSU
FBL3
10uF/16V
C702B
732k
R701
59k
R702
VREF3
-7.5V
VAUX3
FBL3
432k
R101
59k
R102
4.7uF
C101
2.2uH
L1
VSU=(1+R101/R102)*0.6
PVSU
+5V
VSU
3.3uH
L2SD
22uF
C202
267k
R201
59k
R202
+3.3V
VM
22uF for
MSU only
C201B
2.2uH
L2SU
VM=(1+R3/R4)*0.6
VM
VBAT
VBAT
VSD1=(1+R301 /R302 )*0.6
VBAT
118k
R4012.2uH
L4
4.7uF
C402
VSD2
+1.8V
4.7uF
C401
VSD2=(1+R401 /R402 )*0.6
OVL1 =(1+R501/R502)*0.6
VAUX3=-0.6*(R701/R702)
WLED-
4.7uF
C701
Main Channel Step-up: place C 204, L2SU, R2U1, C201AB, R2U2 , R2U3
59k
R402
OVL1
+15V
VAUX2
10uF/16V
C602A
10uF
C
Main Channel Step-down: place R2D1, C201A, L2SD, C202, R2D2
R104
SCF
SCF
AAT2610
CSL1
39
FBL2
1
ENSD2
18
LXSD14
PVSD13
ENM
20
LXL3
34
LXL1
38
LXL2
36
PV 17
OVL1
40
FBSU 23
ENSU
21
FBM9
ENSD1
19
LXSD228
VIN15
LXSU 25
FBSD12
PVSD229
FBSD230
PVSU 24
LXM7
PVM8
ENL1
14
FBL3
32
PVL3
33
PGM
6PGSU
26
PGSD1
5
GND
16 PGL
37
EP
41
SCF22
PGSD2
27
SEQ10
VREF3
31
PVL
35
ENL3
12 ENL2
13
SUSD
11
U1
1.54M
R501
59k
R502
CSL1
CSL1
PVSU
AUX1
AUX3VREF3
JENL2
JENL3
0
R2U3
0
R2D2
PVSU
1uF
C703
1uF
C102
SUSD=PVSU: Ma in channel is set to boost
SUSD=GND: Main channel is set to buck
4.7uF
C204
4.7uF
C503
VAUX2=1+R601 /R602 )*0.6
SGND
PGND
SGND
0
R2D1
0
R2U1
0
R303
0
R403
0
R2U2
0
R503
3.9pF for Li-ion
/1.5pF for 2AA
C704
PVSU 0
R505
0
R506
D505
2 1
D506 0
R504
VBAT
PVSU 0
R603
0
R604
56pF for Li-ion
/6.8 pF for 2A A
C603
0R704
10uF/16V
C702A
10uF /16V
C602B
56pF for MSD/82pF for MSU
C203
VBAT 0
R703
22uF
C103B
27pF
C104
PVL3
/SEQ
R507
22uF for
MSU /4.7uF
for MSD
C201A
0
R304 PVSU
0
R404 PVSU
Figure 4: AAT2610 Evaluation Board Schematic.
AAT2610
7-Channel PMU for Digital Still Cameras
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(a) Top Layer (b) Internal GND Layer
(c) Internal Signal Layer (d) Bottom Layer
Figure 5: AAT2610 Evaluation Board PCB Layout.
AAT2610
7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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7-Channel PMU for Digital Still Cameras
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Designation Part Number Description Manufacturer
IC Device
U1 AAT2610IIC Seven-Channel High Efciency Power
Management Unit AnalogicTech
Capacitor
C T494B106M010AS CAP TAN 10μF B 10V 20% KEMET
C101 GRM21BR61C475K CAP Ceramic 4.7μF 0805 X5R 16V 10%
Murata
C102, C703 GRM185R61A105K CAP Ceramic 1μF 0603 X5R 10V 10%
C103A, C103B, C202 GRM21BR60J226M CAP Ceramic 22μF 0805 X5R 6.3V 20%
C104 GRM1885C1H270J CAP Ceramic 27pF 0603 C0G 50V 5%
C201A, C301, C401, C402,
C501, C503, C601, C701 GRM188R60J475K CAP Ceramic 4.7μF 0603 X5R 6.3V 10%
C203, C603 GRM1885C1H560J CAP Ceramic 56pF 0603 C0G 50V 5%
C302 GRM188R60J106M CAP Ceramic 10μF 0603 X5R 6.3V 20%
C303, C403 GRM1885C1H100J CAP Ceramic 10pF 0603 C0G 50V 5%
C502 GRM188R61E105K CAP Ceramic 1μF 0603 X5R 25V 10%
C602A, C602B, C702A, C702B GRM21BR61C106K CAP Ceramic 10μF 0805 X5R 16V 10%
C704 GRM1885C1H3R9D CAP Ceramic 3.9pF 0603 C0G 50V ±0.5pF
Inductor
L1 CDRH4D22/HP-2R2NC Power Inductor 2.2μH 3.2A SMD
Sumida
L2SD CDRH2D14-3R3NC Power Inductor 3.3μH 1.2A SMD
L3, L4 CDRH2D18/HPNP-2R2NC Power Inductor 2.2μH 1.6A SMD
L5, L6, L7 CDRH2D14 NP-4R7NC Power Inductor 4.7μH 1.0A SMD
Resistor
R2D1, R2D2, R303 R403, R503,
R504, R506, R604, R703 RC0603FR-070RL RES 0Ω 1/10W 1% 0603 SMD
Yageo
R101 RC0603FR-07432KL RES 432KΩ 1/10W 1% 0603 SMD
R102, R202, R302 R402, R502,
R602, R702 RC0603FR-0759KL RES 59KΩ 1/10W 1% 0603 SMD
R201 RC0603FR-07267KL RES 267KΩ 1/10W 1% 0603 SMD
R301 RC0603FR-07187KL RES 187KΩ 1/10W 1% 0603 SMD
R401 RC0603FR-07118KL RES 118KΩ 1/10W 1% 0603 SMD
R501 RC0603FR-071M54L RES 1.54MΩ 1/10W 1% 0603 SMD
R601 RC0402FR-071M42L RES 1.42MΩ 1/16W 1% 0402 SMD
R701 RC0603FR-07732KL RES 732KΩ 1/10W 1% 0603 SMD
Other
D501, D502, D503, D504 RS-0805 30mA White LED 0805 Realstar
D5, D6, D7 MBR0530 Diode Schottky 0.5A 30V SOD-123 International
Rectier
Table 6: AAT2610 Li-ion Application Demo Board Bill of Materials (BOM).
AAT2610
7-Channel PMU for Digital Still Cameras
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Designation Part Number Description Manufacturer
IC Device
U1 AAT2610IIC Seven-Channel High Efciency Power
Management Unit AnalogicTech
Capacitor
C T494B106M010AS CAP TAN 10μF B 10V 20% KEMET
C101 GRM21BR61C475K CAP Ceramic 4.7μF 0805 X5R 16V 10%
Murata
C102, C703 GRM185R61A105K CAP Ceramic 1μF 0603 X5R 10V 10%
C103A, C201A, C201B, C302 GRM21BR60J226M CAP Ceramic 22μF 0805 X5R 6.3V 20%
C203 GRM1885C1H820J CAP Ceramic 82pF 0603 C0G 50V 5%
C204, C301, C401, C402,
C501, C503, C601, C701 GRM188R60J475K CAP Ceramic 4.7μF 0603 X5R 6.3V 10%
C303 GRM1885C1H150J CAP Ceramic 15pF 0603 C0G 50V 5%
C403 GRM1885C1H5R6D CAP Ceramic 5.6pF 0603 C0G 50V ±0.5pF
C502 GRM21BR61E475KA CAP Ceramic 4.7μF 0805 X5R 25V 10%
C602A,C602B, C702A, C702B GRM21BR61C106K CAP Ceramic 10μF 0805 X5R 16V 10%
C603 GRM1885C1H6R8D CAP Ceramic 6.8pF 0603 C0G 50V ±0.5pF
C704 GRM1885C1H1R5D CAP Ceramic 1.5pF 0603 C0G 50V ±0.5pF
Inductor
L1 CDRH4D22/HP-2R2NC Power Inductor 2.2μH 3.2A SMD
Sumida
L2SU, L3, L4 CDRH2D18/HPNP-2R2NC Power Inductor 2.2μH 1.6A SMD
L5, CDRH2D14 NP-4R7NC Power Inductor 4.7μH 1.0A SMD
L6, L7 CDRH2D18/HP-100 Power Inductor 10μH 0.85A SMD
Resistor
R2U1, R2U2, R2U3 R303,
R404, R503, R504, R506,
R604, R704
RC0603FR-070RL RES 0Ω 1/10W 1% 0603 SMD
Yageo
R101 RC0603FR-07432KL RES 432KΩ1/10W 1% 0603 SMD
R102, R202, R301, R302,
R402, R502, R602 RC0603FR-0759KL RES 59KΩ1/10W 1% 0603 SMD
R201 RC0603FR-07267KL RES 267KΩ1/10W 1% 0603 SMD
R401 RC0603FR-07187KL RES 187KΩ 1/10W 1% 0603 SMD
R501 RC0603FR-071M54L RES 1.54MΩ 1/10W 1% 0603 SMD
R601 RC0603FR-071M2L RES 1.2MΩ 1/10W 1% 0603 SMD
R701 RC0603FR-07732KL RES 732KΩ 1/10W 1% 0603 SMD
R702 RC0603FR-0751KL RES 51KΩ 1/10W 1% 0603 SMD
Other
D501, D502, D503, D504 RS-0805 30mA White LED 0805 Realstar
D5, D6, D7 MBR0530 Diode Schottky 0.5A 30V SOD-123 International
Rectier
Table 7: AAT2610 2AA Application Demo Board Bill of Material (BOM).
AAT2610
7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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7-Channel PMU for Digital Still Cameras
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7-Channel PMU for Digital Still Cameras
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Ordering Information
Output Voltage Package Marking1Part Number(Tape & Reel)2
Adj. 0.6V TQFN55-40L 3GXYY AAT2610IIC-T1
All AnalogicTech products are offered in Pb-free packaging. The term “Pb-free” means semiconductor
products that are in compliance with current RoHS standards, including the requirement that lead not exceed
0.1% by weight in homogeneous materials. For more information, please visit our website at
http://www.analogictech.com/about/quality.aspx.
Package Information
TQFN55-40L3
Top View
Side View
Bottom View
5.000 ± 0.050
5.000 ± 0.050
Pin 1 Dot
by Marking
Pin 1 Identification
Chamfer 0.300 x 45°
3.600 ± 0.050
3.600 ± 0.050
0.450 ± 0.050
0.380 ± 0.050
0.200 ± 0.0500.400 BSC
0.750 ± 0.050
0.000 + 0.100
- 0.000
0.203 REF
All dimensions in millimeters.
1. XYY = assembly and date code.
2. Sample stock is generally held on part numbers listed in BOLD.
3. The leadless package family, which includes QFN, TQFN, DFN, TDFN and STDFN, has exposed copper (unplated) at the end of the lead terminals due to the manufacturing
process. A solder fillet at the exposed copper edge cannot be guaranteed and is not required to ensure a proper bottom solder connection.
AAT2610
7-Channel PMU for Digital Still Cameras
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AAT2610
7-Channel PMU for Digital Still Cameras
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Advanced Analogic Technologies, Inc.
3230 Scott Boulevard, Santa Clara, CA 95054
Phone (408) 737-4600
Fax (408) 737-4611
© Advanced Analogic Technologies, Inc.
AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual
property rights are implied. AnalogicTech reserves the right to make changes to their products or specications or to discontinue any product or service without notice. Except as provided in AnalogicTech’s terms and
conditions of sale, AnalogicTech assumes no liability whatsoever, and AnalogicTech disclaims any express or implied warranty relating to the sale and/or use of AnalogicTech products including liability or warranties
relating to tness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. In order to minimize risks associated with the customer’s applications, adequate
design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. Testing and other quality control techniques are utilized to the extent AnalogicTech deems necessary to
support this warranty. Specic testing of all parameters of each device is not necessarily performed. AnalogicTech and the AnalogicTech logo are trademarks of Advanced Analogic Technologies Incorporated. All other
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