AP131
300mA LOW DROPOUT LINEAR REGULATOR WITH SHUTDOWN
Description
The AP131 is a 300mA, fixed outp
ut 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 the EN pin is set to logic high level.
The charact eris tics of low dropout voltage an
d less qui escent current
make it good for s ome critical current appli cat ions, f or example, some
battery powered devices. The typical quiescent current is
approximately 50µA from zero to maximum load. Due to the internal
flexible design, it results in exten
sively fixed output voltage versions
and makes 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.
Features
• Input Voltage Range is from 2.7V to 5.5V
• 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/
• 2.9V/3.0V/3.3V/ 3 .5 V; Accuracy 2%
• Active Low Shutdown Functi on (EN pin)
• Fast Transient Respons e
• Good Load Regulation
• Current Limit and Thermal Shutdown Protection
• Short-Circuit Current Fold-Back
• Lead Free package: SOT25
• SOT25: Available in “Green” Molding Compound
(No Br, Sb)
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
Pin As signm ents
( Top View )
SOT25
3
2
5
4
1IN
EN BP
OUT
GND
Applications
• Battery Pow ered Device
• Wireless Communic ation
• CD-ROM, DVD, an d LAN Card
• PC Peripheral
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and
Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Typical Applicat ions C ircuit
IN OUT
GND
AP131
BP
EN
EN
VIN CIN
CBP
COUT
VOUT
ON
OFF
1uF
0.1uF 10uF
NOT RECOMMENDED FOR NEW DESIGN
USE AP7343
AP131
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AP131
Pin Descriptions
Functional Block Diagram
Current
Limit
Thermal
Shutdown
-
+
IN OUT
GND
1.08V
Error
Amp
Bandgap
Enable
BP
EN
Absolute Ma ximum Ratings (@TA = +25°C, unless otherwise specified. )
Parameter
Rating
Unit
Input Voltage
+6
V
Operating Junction Temperature Range -40 to +125 °C
Storage Temperature Range
-65 to +150
°C
Power Dissipation, PD @ TA = 25°C
SOT25
250
mW
Recommended Operating Conditions (@TA = +25°C, unless otherwise s pecified.)
Symbol
Parameter
Min
Max
Unit
VIN
Input Voltage
2.7
5.5
V
IOUT
Output Current 0 300 mA
TA
Operating Ambient Temperature
-40
85
°C
Pin Name
Description
IN Input Voltage
GND Ground
EN Enable Pin
BP Band-Gap
OUT Output Voltage
AP131
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AP131
Electrical Characteristics (@TA = +25°C, unless otherwise specified.)
TA = 25ºC, CIN = 1µ F, COUT = 10µF, unless otherwi se specified.
Symbol Parameter Conditions Min Typ. Max Unit
VDROP Dropout Voltage (Note 4) IL = 300mA — 400 500 mV
ILIMIT Current Limit (Note 5) VIN = 5V, VOUT = 0V 350 450 — mA
Ishort Short Circuit Current VOUT < 1.05V — 150 300 mA
ΔVLINE Line Regulation IOUT = 1mA,
VIN =( VOUT +1V ) to 5.5V
— 0.1 0.3 %/V
ΔVLOAD Load Regulation (Not e 6) IL = 1~300mA, VIN = 5V — 30 35 mV
ΔVOUT Output Voltage Accuracy IL = 1mA, VIN = 5 V -2 — +2 %
Output Voltage Temperature
Coefficient (Note 7)
— — 50 150 PPM/°C
PSRR Ri ppl e Rejection
F = 100Hz,
CIN = 1μF, CO = 10µF,
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 Enable Pin Voltage Output ON 1.5 — VIN V
VENOFF Out put OFF 0 — 0.8 V
TDELAY Enable Delay Time CBP = 0.1μF, COUT = 1μF,
IOUT = 30mA
— 8 — µS
ϴJA Thermal Resistance
Junction-to-Ambient SOT25 (Note 8) — 163 — °C/W
ϴJC Thermal Resistanc e
Junction-to-Case
SOT25 (Note 8) — 53 — °C/W
Notes: 4. 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 tar get v alu e ± 2%. This test is skipped at the condition of VIN<3V.
5. Current limit is measured at constant junction temperature by using pulsed testing with a low ON time.
6. Regulation is measured at constant junction temperature by using pulsed testing with a lo w ON time.
7. Guaranteed by design.
8. Test conditions for SOT25: Device mounted on FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout.
AP131
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AP131
Typical Characteristics
AP131 PSRR vs. 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)
AP131 Vout vs. 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
030 60 90 120 150 180 210 240 270 300 330
Load Current (uA)
V
out
AP131 GND Current vs. Input Voltage
0
5
10
15
20
25
30
35
40
45
50
55
00.5 11.5 22.5 33.5 44.5 55.5 6
Input Voltage (V)
GND Current (uA)
AP131 Dropout vs . Loa d
0
50
100
150
200
250
300
350
400
450
050 100 150 200 250 300
Load (Io) (mA)
Dropout (V)
V
OUT
=3.3V
AP131
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AP131
Lead-free
Ordering Information
Output Voltage Package Packing
W : SOT25
Lead Free
G : Green
7 : Tape & Reel
L : Lead Free
AP131 - XX W X - 7
15 :1.5V
18
:1.8V
20 :2.0V
25
:2.5V
28 :2.8V
29
:2.9V
30 :3.0V
33
:3.3V
35 :3.5V
Device Package Code Packaging
(Note 2)
7” Tape and Reel
Quantity
Part Number Suffix
AP131-XXWL-7 W SOT25
3000/Tape & Reel
-7
AP131-XXWG-7
W SOT25
3000/Tape & Reel
-7
Marking Information
(1) SOT25
123
5
7
4
XX YW X
XX : Identification code
W : Week : A~Z : 1~26 week;
X : a~z : Lead Free
( Top View )
Y : Year 0~9
a~z : 27~52 week; z represents
52 and 53 week
A~Z : Green
Part Number Package Identification Code
AP131-15W
SOT25
DA
AP131-18W
SOT25
DD
AP131-20W
SOT25
DF
AP131-25W
SOT25
DK
AP131-28W
SOT25
DN
AP131-29W
SOT25
DO
AP131-30W
SOT25
DP
AP131-33W
SOT25
DS
AP131-35W
SOT25
DU
AP131
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AP131
Package Ou t lin e Dim en sio ns
Please see http://www.diodes.com/package-outlines.html for the latest version.
SOT25
SOT25
Dim
Min
Max
Typ
A
0.35
0.50
0.38
B
1.50
1.70
1.60
C
2.70
3.00
2.80
D
-
-
0.95
H
2.90
3.10
3.00
J
0.013
0.10
0.05
K
1.00
1.30
1.10
L
0.35
0.55
0.40
M
0.10
0.20
0.15
N
0.70
0.80
0.75
α
0°
8°
-
All Dimensions in mm
Suggested Pad Layout
Please see http://www.diodes.com/package-outlines.html for the latest version.
SOT25
Dimensions
Value
Z
3.20
G
1.60
X
0.55
Y
0.80
C1
2.40
C2
0.95
A
M
JL
D
B C
H
KN
X
Z
Y
C1
C2
C2
G
AP131
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AP131
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final and determinative f orm at released by Diodes I ncorporat ed.
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representati ves against any dam ages arising out of the use of Diodes Incorporat ed products i n such safety-critical, life support devices or systems.
Copyright © 2019, Diodes Incorporated
www.diodes.com
AP131
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