AP1120
Dual 1A Low Dropout Positive Regulator
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. 0.2 Feb.10, 2004
1/5
Features
• 1.3V maximum dropout at full load current
• Fast transient response
• Output current limiting for each channel.
• Built-in thermal shutdown each channel.
• Good noise rejection
• Dual output ch1=3.3V, ch2=2.5V
(1.8V for B version)
• Packages: SOP-8L
Applications
• PC peripheral
• Communication
General Description
AP1120 series are low dropout positive regulator
with minimum of 1A output current capability. The
product is specifically designed to provide
well-regulated supply for low voltage IC applications
such as high-speed bus termination and low current
3.3V/2.5V or 3.3V/1.8V logic supply. AP1120 series
are guaranteed to have <1.3V dropout at full load
current making it ideal to provide well regulated
outputs dual channels with up to 18V input supply.
Connection Diagram
AP1120
7
5
4
3
2
1
6
GND2
VIN1
3.3VGND1
VIN2
(Top View)
2.5V (1.8V)
8
3.3V
2.5V (1.8V)
Pin Descriptions
NAME FUNCTION
GND1/2 Ground
3.3V(Vout1)
2.5V/1.8V
(Vout2)
The output of the regulator. A
minimum of 10uF capacitor
must be connected from this
pin to ground to insure
stability.
VIN1/2
The input pin of regulator.
Typically a large storage
capacitor is connected from
this pin to ground.
Ordering Information
AP 1120 X X X X
Package Vout
S : SOP-8L
Packing
Blank : Tube
A : Taping
Blank : CH1=3.3V
CH2=2.5V
B : CH1=3.3V
CH2=1.8V
Lead Free
Blank : Normal
L : Lead Free Package
AP1120
Dual 1A Low Dropout Positive Regulator
Anachip Corp.
www.anachip.com.tw Rev. 0.2 Feb.10, 2004
2/5
Typical Circuit
5V
3.3V/1A
(
3.3V/2.5V Dual output
)
C2
100uF
Vin1
3.3V
GND1
GND2
Vin2
3.3V
2.5V
2.5V
C1
100uF
C3
100uF
2.5V/1A
Absolute Maximum Ratings
Symbol Parameter Rating Unit
VIN DC Supply Voltage -0.3 to 18 V V
PD Power Dissipation Internally Limited
TST Storage Temperature -65 to +150 oC
TOP Operating Junction Temperature Range 0 to +150 oC
Block Diagram
2
Thermal
Shutdown
7,8
Vout 1
1.25V +
+
CURRENT
LIMIT
Vin 1
-
+-
+
1
GND 1
4
Thermal
Shutdown
5,6
Vout 2
1.25V +
+
CURRENT
LIMIT
Vin 2
-
+-
+
3
GND 2
AP1120
Dual 1A Low Dropout Positive Regulator
Anachip Corp.
www.anachip.com.tw Rev. 0.2 Jan.28, 2004
3/6
Electrical Characteristics (Under Operating Conditions)
PARAMETER CONDITIONS MIN TYP MAX UNIT
AP1120(B) - VOUT1 IOUT = 10mA, TJ = 25oC,
4.8V≦VIN≦12V 3.235 3.300 3.365 V
AP1120 - VOUT2 IOUT = 10mA, TJ = 25oC,
4V≦VIN≦12V 2.450 2.500 2.550 V
Output Voltage
AP1120B - VOUT2 IOUT = 10mA, TJ = 25oC,
4V≦VIN≦12V 1.764 1.800 1.836 V
Line Regulation IO=10mA,VOUT+1.5V<VIN<12V, TJ=25oC 0.2 %
AP1120 series
VOUT1
VIN = 5V, 0≦IOUT≦1A,
TJ=25oC (Note 1,2) 26 33 mV
Load Regulation AP1120 series
VOUT2
VIN=4V, 0mA<Io<1A,
TJ=25oC (Note 1,2) 20 25 mV
Dropout Voltage
(VIN-VOUT) IOUT = 1A,∆VOUT=0.1%VOUT 1.3 1.4 V
Current Limit (VIN-VOUT) = 5V 1. 1 A
Minimum Load Current 0oC≦Tj≦125oC (Note 3) 5 10 mA
Thermal Regulation TA=25 oC, 30ms pulse 0.008 0.04 %/W
Ripple Rejection F=120Hz,COUT=25uF Tantalum, IOUT=1A 60 70 dB
Temperature Stability IO=10mA 0.5 %
JA
θ
Thermal Resistance
Junction-to-Ambient
(No heat sink; No air
flow)
SOP8: Control Circuitry/Power Transistor
(Note4)
CH1 or CH2 only
CH1 & CH2 and PD1=PD2
50
45
OC/W
JC
θ
Thermal Resistance
Junction-to-Case
SOP8: Control Circuitry/Power Transistor
(Note 4)
CH1 or CH2 only
CH1 & CH2 and PD1=PD2
20
12
OC/W
Note1: See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are
measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead =
1/18” from the package.
Note2: Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the
input/output differentially and the output current. Guaranteed maximum power dissipation will not be available over the full
input/output range.
Note3: Quiescent current is defined as the minimum output current that requires maintaining regulation. At 12V input/output differential
the device is guaranteed to regulate if the output current is greater than 10mA.
Note4: Vout1 and Vout2 are connected to the PCB cupper area 5.5mm*5.5mm separately. If you need large PD or lower Tc & Tj,
please connect to the large cupper area >> 5.5mm*5.5mm (like 10mm*10mm).
AP1120
Dual 1A Low Dropout Positive Regulator
Anachip Corp.
www.anachip.com.tw Rev. 0.2 Feb.10, 2004
4/5
Typical Performance Characteristics
Temperature (
o
C)
Percent Change in Output Voltage vs Temperature
Output Voltage Change (%)
-50 -25 0 25 50 75 100 125 150
- 2
-1.5
- 1
-0.5
0
0. 5
1
1.5
2
Input Voltage (V)
Line Regulation
Output Voltage Deviation (%)
0
0.2
0.4
0.6
0.8
1
24
6 8 10 12
TIME (us)
Line Transient Res
p
onse
Output Voltage Deviation (mV) Input Voltage (V)
-40
-20
0
20
40
5.5
6.5
7.5
Cin=1uF
Cout=10uF Tantalum
0 20 40 60 80 100 120 140 160 180 200
TIME (us)
Load Transient Res
p
onse
Load Current (A) Output Voltage Deviation (mV)
010
20 30 40 50 60 70 80 90 100
-1
0
1
2
-20
-10
0
10
20
30 C in = 1uF
C out = 10 uF Tantalum
Preload = 100mA
Output Current (mA)
Dropout Voltage vs Output Current
Dropout Voltage (V)
0
0. 2
0. 4
0. 6
0. 8
1. 0
1. 2
1. 4
1. 6
1. 8
2. 0
0200 400 600 800
Tj = 125
o
C
Tj = 25
o
C
Temperature (
o
C)
Load Regulation vs Temperature
Output Voltage Deviation (%)
-25 0 25 50 75 100 125
- 1
-0.80
-0.40
-0.20
0
0.20
I load=800mA
AP1120
Dual 1A Low Dropout Positive Regulator
Anachip Corp.
www.anachip.com.tw Rev. 0.2 Feb.10, 2004
5/5
Marking Information
SOP-8L
( Top View )
Logo Blank : 3.3V/2.5V version
B : 3.3V/1.8V version
ID code: internal
Year: "01" =2001
"02" =2002
Xth week: 01~52
~
1
8 5
AC
AP1120 X
YY WW X X
Blank: normal
L: Lead Free Package
4
Package Information
VIEW "A"
L
C
VIEW "A"
H
E
A
A2
A1
B
e
D
7(4X) 0.015x45 7(4X)
y
Dimensions In Millimeters Dimensions In Inches
Symbol Min. Nom. Max. Min. Nom. Max.
A 1.40 1.60 1.75 0.055 0.063 0.069
A1 0.10 - 0.25 0.040 - 0.100
A2 1.30 1.45 1.50 0.051 0.057 0.059
B 0.33 0.41 0.51 0.013 0.016 0.020
C 0.19 0.20 0.25 0.0075 0.008 0.010
D 4.80 5.05 5.30 0.189 0.199 0.209
E 3.70 3.90 4.10 0.146 0.154 0.161
e - 1.27 - - 0.050 -
H 5.79 5.99 6.20 0.228 0.236 0.244
L 0.38 0.71 1.27 0.015 0.028 0.050
y - - 0.10 - - 0.004
θ 0O - 8O 0
O - 8O
