AP131
300mA Low Dropout Linear Regulator with Shutdown
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. 1.2 Oct 28, 2004
1/7
Features
- Input voltage range is up to 7V
- Dropout voltage 400mV at 300mA output current
- Guaranteed 300mA output current.
- Internal R
on
=1.5 PMOS draws no base current
- Low quiescent current 50
A
- Output voltage 2% accuracy, and 1.5V to 5V with
0.1V step
- Active low shutdown function (EN pin).
- Fast transient response
- Good load regulation
- Current limit and thermal shutdown protection
- SOT89-5L and SOT23-5L packages
Applications
- Wireless Communication
- Battery Powered device
- CD-ROM, DVD, and LAN Card
- PC peripheral
General Descriptions
The AP131 is a 300mA, fixed output voltage, low
dropout linear regulator. The Device included pass
element, error amplifier, band-gap, current limit and
thermal shutdown circuitry. The device is ON when
EN pin is set to logic high level.
The characteristics of low dropout voltage and less
quiescent current make it good for some critical
current application, for example, some battery
powered devices. The typical quiescent current is
approximately 50A from zero to maximum load.
Due to internal flexible design, result in extensively
fixed output voltage versions and make it
convenient to use for applications. Built-in
current-limit and thermal-shutdown functions
prevent any fault condition from IC damage. An
external capacitor can be connected to the BP pin
and reduce the output noise.
Pin Assignments
(Top View)
SOT23-5L
3
2
5
4
1
IN
GND
EN
BP
OUT
SOT89-5L
(Top View)
3
2
1
5
4
IN
GND
EN
BP
OUT
Pin Descriptions
Name
Description
IN Input
voltage
GND Ground
EN Enable
pin
BP Bandgap
OUT Output
voltage
AP131
300mA Low Dropout Linear Regulator with Shutdown
Anachip Corp.
www.anachip.com.tw Rev. 1.2 Oct 28, 2004
2/7
Ordering Information
15: 1.5V
25: 2.5V
50: 5.0V
AP131 XX X X X
Y : SOT89-5L
W: SOT23-5L
Output voltage
~
Package
Packing
Blank:Tube
A : Taping
~
Blank : Normal
L : Lead Free Package
Lead Free
Block Diagram
Current
Limit
Thermal
Shutdown
- +
IN
OUT
GND
1.08V
Error
Amp
Bandgap
Enable
BP
EN
Absolute Maximum Ratings
Symbol
Parameter
Rating
Unit
V
CC
Input voltage
-0.1 to +7
V
T
OP
Operating junction temperature range
-40 to +125
C
T
ST
Storage temperature range
-65 to +150
C
Power dissipation, P
D
@T
A
=25C
SOT89-5L +0.5
W
P
D
SOT23-5L
+0.25
W
Package thermal resistance
SOT89-5L
+100
C/W
JA
SOT23-5L +250
C/W
AP131
300mA Low Dropout Linear Regulator with Shutdown
Anachip Corp.
www.anachip.com.tw Rev. 1.2 Oct 28, 2004
3/7
Electrical Characteristics
T
A
=25C, C
IN
=1F, C
OUT
=10F, unless otherwise specified.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
DROP
Dropout voltage (Note 1)
I
L
=300mA -
400
500
mV
I
LIMIT
Current Limit (Note 2)
V
IN
=5V, V
OUT
=0V 350
450
-
mA
V
LINE
Line
regulation
I
L
=1mA, V
IN
=5~7V -
0.1
0.3
%/V
V
LOAD
Load regulation (Note 3)
I
L
=1~300mA, V
IN
=5V -
30
35
mV
Output voltage accuracy
I
L
=1mA, V
IN
=5V -2
-
+2
%
V
OUT
Output voltage temperature
coefficient (Note 4)
-
50
150
PPM/C
PSRR Ripple
Rejection
F=100Hz,
C
IN
=1F, C
O
=10uF,
I
L
=100mA
- 60 - dB
I
SB
Standby
current
I
L
=0mA, V
IN
=5V, EN=0V
-
-
5
A
I
Q
Quiescent
current
I
L
=0mA, V
IN
=5V, EN=5V
-
50
100
A
I
EN
Enable pin current
-
-
< 0.1
A
V
ENON
Output
ON
1.5
-
V
IN
V
V
ENOFF
Enable pin voltage
Output OFF
0
-
0.8
V
T
DELAY
Enable delay time
C
BP
=0.1F, C
OUT
=1F,
I
OUT
=30mA
- 8 - S
Note 1. Dropout voltage is defined as the input to output differential voltage. Dropout is measured at constant junction temperature by
using pulsed ON time, and the criterion is V
OUT
inside target value 2%. This test is skipped at the condition of V
IN
<3V.
Note 2. Current limit is measured at constant junction temperature by using pulsed testing with a low ON time.
Note 3. Regulation is measured at constant junction temperature by using pulsed testing with a low ON time.
Note 4. Guaranteed by design.
Typical Application Circuit
IN
OUT
GND
AP131
BP
EN
EN
V
IN
C
IN
C
BP
C
OUT
V
OUT
ON
OFF
1uF
0.1uF
10uF
AP131
300mA Low Dropout Linear Regulator with Shutdown
Anachip Corp.
www.anachip.com.tw Rev. 1.2 Oct 28, 2004
4/7
Typical Characteristics
AP131 PSRR V.S. Frequency
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
10
100
1K
10K
100K
1M
Frequency (Hz)
PSRR (dB)
PSRR V.S. Frequency
AP131 Vout V.S. Load Current
3.02
3.025
3.03
3.035
3.04
3.045
3.05
3.055
3.06
3.065
3.07
3.075
3.08
3.085
3.09
3.095
0
30 60 90 120 150 180 210 240 270 300 330
Load Current (uA)
Vout
(V)
Vout V.S. Load Current
AP131 GND Current V.S. Input Voltage
0
5
10
15
20
25
30
35
40
45
50
55
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
Input Voltage (V)
GND Current (uA)
GND Current V.S. Input Voltage
AP131 Dropout V.S. Load
0
0.05
0.1
0.15
0.2
0.25
0.3
0
50
100
150
200
250
300
350
Load (Io) (mA)
Dr
o
p
out
(
V
)
Dropout V.S. Load
AP131
300mA Low Dropout Linear Regulator with Shutdown
Anachip Corp.
www.anachip.com.tw Rev. 1.2 Oct 28, 2004
5/7
Marking Information
1
3
Year:0~9
Month: A~L
Identification code
(See appendix)
4
XX Y M X
2
5
(Top View)
SOT89-5L
1
3
Year: 0~9
Month: A~L
Identification code
(See appendix)
2
X X
Y M X
5
4
(Top View)
SOT23-5L
Blank: normal
L: Lead Free Package
Blank: normal
L: Lead Free Package
Appendix
Part Number
Part Number
SOT23
SOT89
Identification
code
SOT23
SOT89
Identification
code
AP131-15W AP131-15Y
DA
AP131-33W AP131-33Y
DS
AP131-16W AP131-16Y
DB
AP131-34W AP131-34Y
DT
AP131-17W AP131-17Y
DC
AP131-35W AP131-35Y
DU
AP131-18W AP131-18Y
DD
AP131-36W AP131-36Y
DV
AP131-19W AP131-19Y
DE
AP131-37W AP131-37Y
DW
AP131-20W AP131-20Y
DF
AP131-38W AP131-38Y
DX
AP131-21W AP131-21Y
DG
AP131-39W AP131-39Y
DY
AP131-22W AP131-22Y
DH
AP131-40W AP131-40Y
DZ
AP131-23W AP131-23Y
DI
AP131-41W AP131-41Y
D0
AP131-24W AP131-24Y
DJ
AP131-42W AP131-42Y
D1
AP131-25W AP131-25Y
DK
AP131-43W AP131-43Y
D2
AP131-26W AP131-26Y
DL
AP131-44W AP131-44Y
D3
AP131-27W AP131-27Y
DM
AP131-45W AP131-45Y
D4
AP131-28W AP131-28Y
DN
AP131-46W AP131-46Y
D5
AP131-29W AP131-29Y
DO
AP131-47W AP131-47Y
D6
AP131-30W AP131-30Y
DP
AP131-48W AP131-48Y
D7
AP131-31W AP131-31Y
DQ
AP131-49W AP131-49Y
D8
AP131-32W AP131-32Y
DR
AP131-50W AP131-50Y
D9
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