AP131
300mA LOW DROPOUT LINEAR REGULATOR WITH
SHUTDOWN
Features
•
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•
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•
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Input Voltage Range is from 2.7 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/ 3.5V; 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
Lead Free package: SOT25
SOT25: Available in “Green” Molding Compound
(No Br, Sb)
Lead Free Finish/RoHS Compliant (Note 1)
General Description
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 the 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 applications, for
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 extensively 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.
Applications
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Battery Powered Device
Wireless Communication
CD-ROM, DVD, and LAN Card
PC Peripheral
Ordering Information
AP131 - XX W X - 7
Output Voltage
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
Package
W : SOT25
Lead Free
L : Lead Free
G : Green
Packing
7 : Tape & Reel
Device
Lead-free
Package
Code
W
W
AP131-XXWL-7
AP131-XXWG-7
Notes:
Packaging
(Note 2)
SOT25
SOT25
7” Tape and Reel
Quantity
Part Number Suffix
3000/Tape & Reel
-7
3000/Tape & Reel
-7
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
AP131 Rev. 7
1 of 7
www.diodes.com
FEBRUARY 2009
©
Diodes Incorporated
AP131
300mA LOW DROPOUT LINEAR REGULATOR WITH
SHUTDOWN
Electrical Characteristics
T
A
= 25ºC, C
IN
= 1µF, C
OUT
= 10µF, unless otherwise specified.
Symbol
Parameter
Conditions
V
DROP
I
LIMIT
I
short
ΔV
LINE
ΔV
LOAD
ΔV
OUT
Dropout Voltage (Note 3)
Current Limit (Note 4)
Short Circuit Current
Line Regulation
Load Regulation (Note 5)
Output Voltage Accuracy
Output Voltage Temperature
Coefficient (Note 6)
Ripple Rejection
Standby Current
Quiescent Current
Enable Pin Current
Enable Pin Voltage
Enable Delay Time
Thermal Resistance
Junction-to-Ambient
Thermal Resistance
Junction-to-Case
Min
-
350
-
-
-
-2
-
Typ.
400
450
150
0.1
30
-
50
60
-
50
-
-
-
8
163
53
Max
500
-
300
0.3
35
+2
150
-
5
100
< 0.1
V
IN
0.8
-
Unit
mV
mA
mA
%/V
mV
%
PPM/
ºC
dB
μA
μA
μA
V
V
μS
O
I
L
= 300mA
V
IN
= 5V, V
OUT
= 0V
V
OUT
< 1.05V
I
OUT
=1mA, V
IN
=( V
OUT
+1V )
to 5.5V
I
L
= 1~300mA, V
IN
= 5V
I
L
= 1mA, V
IN
= 5V
PSRR
I
SB
I
Q
I
EN
V
ENON
V
ENOFF
T
DELAY
θ
JA
θ
JC
Notes:
F = 100Hz,
C
IN
= 1μF, C
O
= 10uF,
I
L
= 100mA
I
L
= 0mA, V
IN
= 5V, EN = 0V
I
L
= 0mA, V
IN
= 5V, EN = 5V
Output ON
Output OFF
C
BP
= 0.1μF, C
OUT
= 1μF,
I
OUT
= 30mA
SOT25 (Note 7)
SOT25 (Note 7)
-
-
-
-
1.5
0
-
C/W
C/W
O
3. 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.
4. Current limit is measured at constant junction temperature by using pulsed testing with a low ON time.
5. Regulation is measured at constant junction temperature by using pulsed testing with a low ON time.
6. Guaranteed by design.
7. Test conditions for SOT25: Device mounted on FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout.
AP131 Rev. 7
4 of 7
www.diodes.com
FEBRUARY 2009
©
Diodes Incorporated
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