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. 0.2 Feb 10, 2004
1/7
Features
- Input voltage range is up to 7V
- Dropout voltage 400mV at 300mA output current
- Guaranteed 300mA output current.
- Internal Ron =1.5Ω PMOS draws no base current
- Low quiescent current 50µA
- 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 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.
Pin Assignments
(Top View)
SOT23-5L
3
2
5
4
1IN
GND
EN BP
OUT
SOT89-5L
(Top View)
3
2
15
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. 0.2 Feb 10, 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
VCC Input voltage -0.1 to +7 V
TOP Operating junction temperature range -40 to +125 ºC
TST Storage temperature range -65 to +150 ºC
Power dissipation, PD @TA=25ºC
SOT89-5L +0.5 W
PD
SOT23-5L +0.15 W
Package thermal resistance
SOT89-5L +100 ºC/W
ΘJA
SOT23-5L +250 ºC/W
AP131
300mA Low Dropout Linear Regulator with Shutdown
Anachip Corp.
www.anachip.com.tw Rev. 0.2 Feb 10, 2004
3/7
Electrical Characteristics
TA=25ºC, CIN=1µF, COUT=10µF, unless otherwise specified.
Symbol Parameter Conditions Min. Typ. Max. Unit
VDROP Dropout voltage (Note 1) IL=300mA - 400 500 mV
ILIMIT Current Limit (Note 2) VIN=5V, VOUT=0V 350 450 - mA
∆VLINE Line regulation IL=1mA, VIN=5~7V - 0.1 0.3 %
∆VLOAD Load regulation (Note 3) IL=1~300mA, VIN=5V - 30 35 mV
Output voltage accuracy IL=1mA, VIN=5V -2 - +2 %
∆VOUT Output voltage temperature
coefficient (Note 4) - 50 150 PPM/ºC
PSRR Ripple Rejection
F=100Hz,
CIN=1μF, CO=10uF,
IL=100mA
-- 60 -- dB
ISB Standby current IL=0, VIN=5V - 50 100
μA
IEN Enable pin current - - < 0.1 μA
VENON Output ON 1.15 - - V
VENOFF Enable pin voltage Output OFF - - 1.13 V
TDELAY Enable delay time CBP=0.1μF, COUT=1μF,
IOUT=30mA - 8 -
μS
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 VOUT inside target value ±2%. This test is skipped at the condition of VIN<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
AP131
300mA Low Dropout Linear Regulator with Shutdown
Anachip Corp.
www.anachip.com.tw Rev. 0.2 Feb 10, 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
Fre
q
uenc
y
(
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
00.511.522.533.544.555.56
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)
Dro
p
out
(
V
)
Dropout V.S. Load
AP131
300mA Low Dropout Linear Regulator with Shutdown
Anachip Corp.
www.anachip.com.tw Rev. 0.2 Feb 10, 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
AP131
300mA Low Dropout Linear Regulator with Shutdown
Anachip Corp.
www.anachip.com.tw Rev. 0.2 Feb 10, 2004
6/7
Package Information
(1) Package Type: SOT89-5L
D
C
A
I
H
G
EB
K
J
L
F
F
Dimensions In Millimeters Dimensions In Inches
Symbol Min. Nom. Max. Min. Nom. Max.
A 4.40 4.50 4.60 0.173 0.177 0.181
B 4.05 4.15 4.25 0.159 0.163 0.167
C 1.50 1.60 1.70 0.059 0.063 0.067
D 1.30 1.40 1.50 0.051 0.055 0.059
E 2.40 2.50 2.60 0.094 0.098 0.102
F 0.80 - - 0.031 - -
G 3.00 Ref. 0.118 Ref.
H 1.50 Ref. 0.059 Ref.
I 0.40 0.46 0.52 0.016 0.018 0.020
J 1.40 1.50 1.60 0.055 0.059 0.063
K 0.35 0.39 0.43 0.014 0.015 0.017
L 5o Typ. 5o Typ.
AP131
300mA Low Dropout Linear Regulator with Shutdown
Anachip Corp.
www.anachip.com.tw Rev. 0.2 Feb 10, 2004
7/7
Package Information (Continued)
(2) Package Type: SOT23-5L
θ
Gauge Plane
0.25 mm
L
L1
E1 E
e1
D
123
4
5
b
e
b1
b
CC1
Base
Metal
With
Plating
A2
A1
A
Seating Plane
0.10 C
5x
2(4x)
θ
1(4x)
θ
Dimensions In Millimeters Dimensions In Inches
Symbol Min. Nom. Max. Min. Nom. Max.
A 1.05 1.20 1.35 0.041 0.047 0.053
A1 0.05 0.10 0.15 0.002 0.004 0.006
A2 1.00 1.10 1.20 0.039 0.043 0.047
b 0.25 - 0.55 0.010 - 0.022
b1 0.25 0.40 0.45 0.010 0.016 0.018
c 0.08 - 0.20 0.003 - 0.008
c1 0.08 0.11 0.15 0.003 0.004 0.006
D 2.70 2.85 3.00 0.106 0.112 0.118
E 2.60 2.80 3.00 0.102 0.110 0.118
E1 1.50 1.60 1.70 0.059 0.063 0.067
L 0.35 0.45 0.55 0.014 0.018 0.022
L1 0.60 Ref. 0.024 Ref.
e 0.95 Bsc. 0.037 Bsc.
e1 1.90 Bsc. 0.075 Bsc.
θ 0o 5
o 10o 0
o 5
o 10o
θ1 3o 5
o 7
o 3
o 5
o 7
o
θ2 6o 8
o 10o 6
o 8
o 10o
