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 50µA 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.
Applications
- Wireless Communication
- Battery Powered device
- CD-ROM, DVD, and LAN Card
- PC peripheral
Pin Assignments
(Top View)
EN
GND
IN
1
2
3
4 OUT
5
BP
Pin Descriptions
Name
IN
GND
EN
BP
OUT
Description
Input voltage
Ground
Enable pin
Bandgap
Output voltage
SOT89-5L
(Top View)
IN
GND
EN
1
2
3
4
BP
5
OUT
SOT23-5L
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
1/7
AP131
300mA Low Dropout Linear Regulator with Shutdown
Ordering Information
AP131 XX X X X
Output voltage
15: 1.5V
25: 2.5V
50: 5.0V
~
~
Package
Y : SOT89-5L
W: SOT23-5L
Lead Free
Blank : Normal
L : Lead Free Package
Packing
Blank:Tube
A : Taping
Block Diagram
IN
Error
Amp
OUT
Current
Limit
EN
Enable
-
+
Bandgap 1.08V
Thermal
Shutdown
BP
GND
Absolute Maximum Ratings
Symbol
V
CC
T
OP
T
ST
Input voltage
Operating junction temperature range
Storage temperature range
Power dissipation, P
D
@T
A
=25ºC
P
D
SOT89-5L
SOT23-5L
Package thermal resistance
Θ
JA
SOT89-5L
SOT23-5L
+100
+250
ºC/W
ºC/W
+0.5
+0.15
W
W
Parameter
Rating
-0.1 to +7
-40 to +125
-65 to +150
Unit
V
ºC
ºC
Anachip Corp.
www.anachip.com.tw
2/7
Rev. 0.2
Feb 10, 2004
AP131
300mA Low Dropout Linear Regulator with Shutdown
Electrical Characteristics
T
A
=25ºC, C
IN
=1µF, C
OUT
=10µF, unless otherwise specified.
Symbol
V
DROP
I
LIMIT
∆V
LINE
∆V
LOAD
∆V
OUT
Parameter
Dropout voltage (Note 1)
Current Limit (Note 2)
Line regulation
Load regulation (Note 3)
Output voltage accuracy
Output voltage temperature
coefficient (Note 4)
Ripple Rejection
Standby current
Enable pin current
Enable pin voltage
Enable delay time
Conditions
I
L
=300mA
V
IN
=5V, V
OUT
=0V
I
L
=1mA, V
IN
=5~7V
I
L
=1~300mA, V
IN
=5V
I
L
=1mA, V
IN
=5V
Min.
-
350
-
-
-2
-
Typ.
400
450
0.1
30
-
50
60
50
-
-
-
8
Max.
500
-
0.3
35
+2
150
--
100
< 0.1
-
1.13
-
Unit
mV
mA
%
mV
%
PPM/ºC
dB
μA
μA
V
V
μS
PSRR
I
SB
I
EN
V
ENON
V
ENOFF
T
DELAY
F=100Hz,
C
IN
=1μF, C
O
=10uF,
I
L
=100mA
I
L
=0, V
IN
=5V
Output ON
Output OFF
C
BP
=0.1μF, C
OUT
=1μF,
I
OUT
=30mA
--
-
-
1.15
-
-
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.
