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. 1.5 Nov 07, 2005
1/8
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: 1.5V/1.8V/2.0V/2.5V/2.8V/3.0V/
3.3V/3.5V; accuracy 2%
- Active low shutdown function (EN pin).
- Fast transient response
- Good load regulation
- Current limit and thermal shutdown protection
- Short circuit current fold-back
- SOT89-5L ,SOT23-5L and TSOT23-5L Pb-Free
Package
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/TSOT23-5L
3
2
5
4
1
IN
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
SOT-89 Packages
Not Recommended for New Design
SOT89 and TSSOT23-L Packages
Not Recommended for New Design
SOT89 and TSOT23-5L Packages
Not Recommended for New Design
AP131
300mA Low Dropout Linear Regulator with Shutdown
Anachip Corp.
www.anachip.com.tw Rev. 1.5 Nov 07, 2005
2/8
Ordering Information
AP131 XX X X
Y : SOT89-5L
W : SOT23-5L
Output voltage Package Packing
Blank:Tube
A : Taping
15 : 1.5V
18 : 1.8V
20 : 2.0V
25 : 2.5V
28 : 2.8V
30 : 3.0V
33 : 3.3V
35 : 3.5V
TW:TSOT23-5L
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 / TSOT23-5L +0.25 W
Package Thermal Resistance
SOT89-5L +100 ºC/W
ΘJA
SOT23-5L / TSOT23-5L +250 ºC/W
SOT-89 Packages
Not Recommended for New Design
SOT89 and TSSOT23-L Packages
Not Recommended for New Design
SOT89 and TSOT23-5L Packages
Not Recommended for New Design
AP131
300mA Low Dropout Linear Regulator with Shutdown
Anachip Corp.
www.anachip.com.tw Rev. 1.5 Nov 07, 2005
3/8
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
Ishort Short Circuit Current VOUT<1.05V - 150 300 mA
∆VLINE Line Regulation IL=1mA, VIN=5~7V - 0.1 0.3 %/V
∆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, C O=10uF,
IL=100mA
- 60 - dB
ISB Standby Current IL=0mA, VIN=5V, EN=0V - - 5 µA
IQ Quiescent Current IL=0mA, VIN=5V, EN=5V - 50 100 µA
IEN Enable Pin Current - - < 0.1 µA
VENON Output ON 1.5 - VIN V
VENOFF Enable Pin Voltage Output OFF 0 - 0.8 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
VIN
CIN
CBP
COUT
V
OUT
ON
OFF
1uF
0.1uF
10uF
SOT-89 Packages
Not Recommended for New Design
SOT89 and TSSOT23-L Packages
Not Recommended for New Design
SOT89 and TSOT23-5L Packages
Not Recommended for New Design
AP131
300mA Low Dropout Linear Regulator with Shutdown
Anachip Corp.
www.anachip.com.tw Rev. 1.5 Nov 07, 2005
4/8
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
SOT-89 Packages
Not Recommended for New Design
SOT89 and TSSOT23-L Packages
Not Recommended for New Design
SOT89 and TSOT23-5L Packages
Not Recommended for New Design
AP131
300mA Low Dropout Linear Regulator with Shutdown
Anachip Corp.
www.anachip.com.tw Rev. 1.5 Nov 07, 2005
5/8
Marking Information
XX : Identification code
(See Appendix)
Y : Year: 0-9
M : Month: A~L
SOT23-5L
XX Y M
7
123
45
SOT89-5L
1 32
X X
Y M
5 4
(Top View)
XX : Identification code
(See Appendix)
Y : Year: 0-9
M : Month: A~L
XX : Identification code
(See Appendix)
Y : Year: 0-9
M : Month: A~L
TSOT23-5L
XX Y M
7
123
45
Appendix
Part Number
SOT23-5/TSOT23-5 SOT89-5
Identification
code
AP131-15W AP131-15Y DA
AP131-18W AP131-18Y DD
AP131-20W AP131-20Y DF
AP131-25W AP131-25Y DK
AP131-28W AP131-28Y DN
AP131-30W AP131-30Y DP
AP131-33W AP131-33Y DS
AP131-35W AP131-35Y DU
SOT-89 Packages
Not Recommended for New Design
SOT89 and TSSOT23-L Packages
Not Recommended for New Design
SOT89 and TSOT23-5L Packages
Not Recommended for New Design
AP131
300mA Low Dropout Linear Regulator with Shutdown
Anachip Corp.
www.anachip.com.tw Rev. 1.5 Nov 07, 2005
6/8
Package Information
(1) Package Type: SOT89-5L
D
C
A
I
H
G
E
B
FF
K
J
L
0.5
1.1
1.5
4.6
1.2
0.55
Land Pattern Recommendation (Unit: mm)
1.7
0.4
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.
SOT-89 Packages
Not Recommended for New Design
SOT89 and TSSOT23-L Packages
Not Recommended for New Design
SOT89 and TSOT23-5L Packages
Not Recommended for New Design
AP131
300mA Low Dropout Linear Regulator with Shutdown
Anachip Corp.
www.anachip.com.tw Rev. 1.5 Nov 07, 2005
7/8
Package Information (Continued)
(2) Package Type: SOT23-5L
L
e
E
HE
D
A2
A1
b(5x)
A
VIEW C
L1
1(4x)
2(4x)
e1
GAUGE PLANE
C
SEE VIEW C
θ
θ
θ
Dimensions In Millimeters Dimensions In Inches
Symbol Min. Nom. Max. Min. Nom. Max.
A 1.05 - 1.35 0.041 - 0.053
A1 0.05 - 0.15 0.002 - 0.006
A2 1.00 1.10 1.20 0.039 0.043 0.047
b 0.25 - 0.50 0.010 - 0.020
C 0.08 - 0.20 0.003 - 0.008
D 2.70 2.90 3.00 0.106 0.114 0.118
E 1.50 1.60 1.70 0.059 0.063 0.067
HE 2.60 2.80 3.00 0.102 0.110 0.118
L 0.30 - 0.60 0.012 - 0.024
L1 0.50 0.60 0.70 0.020 0.024 0.028
e 1.80 1.90 2.00 0.071 0.075 0.079
e1 0.85 0.95 1.05 0.033 0.037 0.041
θ 0
o 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
SOT-89 Packages
Not Recommended for New Design
SOT89 and TSSOT23-L Packages
Not Recommended for New Design
SOT89 and TSOT23-5L Packages
Not Recommended for New Design
AP131
300mA Low Dropout Linear Regulator with Shutdown
Anachip Corp.
www.anachip.com.tw Rev. 1.5 Nov 07, 2005
8/8
Package Information (Continued)
(3) Package Type: TSOT23-5L
E1
E
e
e1
b
D
A
A1
A2
y
2
4x 1
L1
R
L
C
L2
GAUGE PLANE
θ
θ
θ
Dimensions In Millimeters Dimensions In Inches
Symbol Min. Nom. Max. Min. Nom. Max.
A 0.75 - 0.90 0.030 - 0.035
A1 0.00 - 0.10 0.000 - 0.004
A2 0.70 0.75 0.80 0.028 0.030 0.031
b 0.35 - 0.51 0.014 - 0.020
C 0.10 - 0.25 0.004 - 0.010
D 2.80 2.90 3.00 0.110 0.114 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
e 0.95 BSC. 0.037
e1 1.90 BSC. 0.075
L 0.37 - - 0.015 - -
L1 0.60 REF. 0.024
L2 0.25 BSC. 0.010
y - - 0.10 - - 0.004
R 0.10 - - 0.004 - -
θ 0
o - 8o 0
o - 8o
θ1 7o NOM. 7o NOM.
θ2 5o NOM. 5o NOM.
SOT-89 Packages
Not Recommended for New Design
SOT89 and TSSOT23-L Packages
Not Recommended for New Design
SOT89 and TSOT23-5L Packages
Not Recommended for New Design
