AIC1523
500mA Power Distribution Switch
Analog Integrations Corporation 4F, 9 Industry E. 9th Rd, Science-Based Industrial Park, Hsinchu, Taiwan DS-1523-00 032502
TEL: 886-3-5772500 FAX: 886-3-5772510 www.analog.com.tw
1
n FEATURES
•120mΩ (5V Input) High-Side MOSFET Switch.
l 500mA Continuous Load Current.
l 80µA Typical On-State Supply Current.
l 1µA Typical Off-State Supply Current.
l Current-Limit / Short Circuit Protection.
l Thermal Limiting Protection under Overcurrent
Condition.
l Output can be Forced Higher than Input (Off-State).
l Active-High or Active-Low Enable.
n APPLICATIONS
l Power Management.
l PCI Cards With Wake-On- LAN
l Hot Plug-In Power Supplies.
l Power Distribution Switch.
n DESCRIPTION
The AIC1523 is an integrated high-side power
distribution switch for input power selection
applications that using in portable products or PCI
interface peripheral cards. The high-side switch is
a MOSFET with 120mΩ RDS(ON), low voltage drop
and low power consumption meet power saving
requirements. The switch ON/OFF is controlled by
CTL pin.
Output current is typically limited to 1.0A, well
below the 5A safety requirement, and thermal
shutdown function shuts the switch off to prevent
damage under overcurrent conditions.
Design easily and layout flexibility for getting
stable voltage in power transfer transition for power
selection application. Guaranteed minimum
output rise time limits inrush current during hot
plug-in, minimizing EMI and preventing the voltage
at upstream port from dropping excessively.
n TYPICAL APPLICATION CIRCUIT
33
µ
F
5.0V
V
CC OUT
IN
*
33µF
0
.
01
µ
F
0.1µF
VOUT
+
AIC1523-0
+
GNDCTL
*33µF, 16V Tantalum, or
100µF, 10V Electrolytic
Bold line indicate high-current traces
High-Side Power Distribution Switch
AIC1523
2
n ORDERING INFORMATION
PIN CONFIGURATION
MSOP8
TOP VIEW
NC
NC
OUT
GND
IN
CTL
NC
NC
SO-8
TOP VIEW
NC
NC
OUT
GND
IN
CTL
NC
NC
PACKING TYPE
TR: TAPE & REEL
TB: TUBE
PACKAGING TYPE
O: MSOP
S: SO8
CONTROL POLARITY
0: Active Low
1: Active High
AIC
152
3-
C
XX
Example: AIC1523-0COTR
àActive Low Version in MSOP
Package & Taping & Reel Packing
1
3
4
28
6
5
7
1
3
4
28
6
5
7
n ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VIN) 7.0V
Operating Temperature Range -40°C ~ 85°C
Storage Temperature Range -65°C ~ 150°C
n ELECTRICAL CHARACTERISTICS (VIN= 5V, TA=25°C, unless otherwise
specified.)
PARAMETERS
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supply Current Switch Off, OUT=Open
Switch On, OUT=Open 0.75
80 2
100 µA
Control Input Voltage VCTL =Logic “0”
VCTL =Logic “1”
2.4
0.8 V
Control Input Current VCTL =Logic “0”
VCTL =Logic “1” 0.01
0.01 1
1 µA
Output MOSFET Resistance IOUT = 500mA 120 180 mΩ
Output Turn-On Rise Delay RL = 10Ω 30 µS
Output Turn-On Rise Time RL = 10Ω 500 µS
Output Turn-Off Delay RL = 10Ω 0.2 10 µS
AIC1523
3
n ELECTRICAL CHARACTERISTICS (Continued)
PARAMETERS
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Output Turn-Off Fall Time RL = 10Ω 0.2 10 µS
Output Leakage Current 2 µA
Current Limit Threshold Vin = 5.0V 0.6 1.0 1.25 A
Current Limit Threshold Vin = 2.4V 0.6 A
Thermal Limit 110 °C
n TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current (µA)
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
50
55
60
65
70
75
80
85
90
Fig.
1
On-State Supply Current vs. Supply Voltage
Supply Voltage (V) -40 -20 0 20 40 60 80 100
65
70
75
80
85
Fig. 2 On-State Supply Current vs. Temperature
Supply Current (µA)
Temperature (
°
C)
Fig. 3 Off-State Supply Current vs. Supply Voltage
Supply Voltage (V)
Supply Current (nA)
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
-40
-20
0
20
40
60
80
100
0
2
4
6
8
10
12
14
16
18
20
Fig. 4 Off-State Supply Current vs. Temperature
Supply Current (nA)
nt (
nA)
Temperature (°C)
AIC1523
4
n TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Supply Voltage
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
100
105
110
115
120
125
130
Fig. 5 Output On Resistance vs. Supply Voltage
Switch_ON Risistance (mΩ)
Switch On Resistance (m
Ω
)
Temperature (°C)
-40
-20
0
20
40
60
80
100
80
90
100
110
120
130
140
150
Fig. 6 Output On Resistance vs. Temperature
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
400
500
600
700
800
900
1000
Supply Voltage (V)
Fig. 7 Current Limit vs. Supply Voltage
Current Limit (mA)
Output Rise Time (
µ
S)
Temperature (°C)
Fig. 8 Output Rise Time vs. temperature
-40
-20
0
20
40
60
80
100
350
400
450
500
550
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
CTL rising
CTL falling
Fig. 9 CTL Threshold Voltage vs. Supply Voltage
Supply Voltage (V) Temperature (°C)
Fig. 10 Output Fall Time vs. Temperature
Output Fall Time (nS)
-40
-20
0
20
40
60
80
100
50
100
150
200
250
300
AIC1523
5
n TYPICAL PERFORMANCE CHARACTERISTICS (Continued )
Fig. 11 Turn On Rising Time (10Ω loading)
CTL
IOUT
VOUT
200mA/DIV
426µS
Fig. 12 Turn On Characteristic (35Ω, Loading)
100µF
No Cap
IOUT, 200mA/DIV
220
µ
F
CTL
Fig. 13 Turn Off Falling Time (10Ω Loading)
CTL
IOUT
VOUT
107nS
200mA/DIV
CTL
IOUT
VOUT
500mA/DIV
Fig. 14 Turn On Characteristic (35Ω, 100µF Loading)
CTL
IOUT
VOUT
500mA/DIV
Fig. 15 Turn Off Falling Time (35Ω, 100uF Loading)
AIC1523
6
n TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
IOUT 500mA/DIV
VOUT
1A
1.2A
Fig. 16 Current Limit Threshold
Thermal limit (2Ω) loading)
IOUT 500mA/DIV
VOUT
Fig. 17 Thermal Limiting Transient Response
Thermal Oscillation
IOUT 500mA/DIV
VOUT
Fig. 18 Short Circuit Testing
I
OUT
1A/DIV
Short
VOUT
Fig. 19 Short Circuit Response Time
n BLOCK DIAGRAM
GATE
NMOS
RS
Limit
Current
Gate Control
Charge
Pump
Thermal
Protection
OSC.
GND
OUT
IN
CTL
AIC1523
7
n PIN DESCRIPTION
PIN 1/4/6/8: NC:
PIN 2: CTL -TTL compatible control input. It
controls the power switch turn-
on/turn-off. Active High for
AIC1523-1 and active low for
AIC1523-0.
PIN 3: IN- Power supply input.
PIN 5: GND- Chip power ground.
PN 7: OUT- MOSFET switch output.
n APPLICATION INFORMATIONS
Current Limit
The current limit threshold is preset internally. It
protects the output MOSFET switches from
damage due to undesirable short circuit conditions
or excess inrush current often encountered during
hot plug-in. The AIC1523 allows minimum 500mA
continuous load current per Channel.
Thermal Protection
When the chip temperature exceeds 110°C, the
thermal protection function works.
Supply Filtering
A 0.1uF to 1uF bypass capacitor from IN to GND,
located near the device, is strongly recommended
to control supply transients. Without a bypass
capacitor, an output short may cause sufficient
ringing on the input (from supply lead inductance)
to damage internal control circuitry.
Transient Droop Requirements
A current surge is caused by the input capacitance
of device. Ferrite beads are recommended in series
with all power and ground connector pins. Ferrite
beads reduce EMI and limit the inrush current
during hot-attachment by filtering high-frequency
signals.
Short Circuit Transient
Bulk capacitance provides the short-term transient
current needed during a hot-attachment event.
With a 33uF, 16V tantalum or 100uF, 10V
electrolytic capacitor mounted close to
downstream connector should provide transient
drop protection.
Printed Circuit Layout
The power circuitry of printed circuit boards
requires a customized layout to maximize thermal
dissipation and to minimize voltage drop and EMI.
AIC1523
8
■ PHYSICAL DIMENSIONS
l MSOP 8 (unit: mm)
SYMBOL MIN MAX
A0.76 0.97
A1 -- 0.20
B0.28 0.38
C0.13 0.23
D2.90 3.10
E2.90 3.10
e0.65
H4.80 5.00
L0.40 0.66
D
H
e
A
B
A1
C
E
L
l 8 LEAD PLASTIC SO (unit: mm)
SYMBOL MIN MAX
A1.35 1.75
A1 0.10 0.25
B0.33 0.51
C0.19 0.25
D4.80 5.00
E3.80 4.00
e1.27(TYP)
H5.80 6.20
L0.40 1.27
D
H
e
A
B
A1
C
E
L