
APL5325
Adjustable Low Dropout 300mA Linear Regulator
Features
• Wide Operating Voltage: 3~6V
• Low Dropout Voltage:
300mV(Typical) @ 300mA
• Guaranteed 300mA Output Current
• Adjustable Output Voltage: 0.8~5.5V
• Current-Limit Protection with Foldback Current
• Over-Temperature Protection
• Stable with Low ESR Ceramic Capacitor
• SOT-23-5 Package
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
• Cellular Phones
• Portable and Battery-Powered Equipment
General Description
The APL5325 is a P-channel low dropout linear regulator
which needs only one input voltage from 3 to 6V, and
delivers current up to 300mA to set output voltage. It also
can work with low ESR ceramic capacitors and is ideal for
using in the battery-powered applications such as notebook computers and cellular phones. Typical dropout voltage is only 300mV at 300mA loading.
Current limit with current foldback and thermal shutdown
functions protect the device against c urrent over-loads
and over temperature. The APL5325 is available in a SOT23-5 package.
Pin Configuration
SHDN 1
GND 2
VIN 3
SOT-23-5
5 SET
4 VOUT
• Notebook and Personal Computers
Simplified Application Circuit
V
IN
C
IN
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright ANPEC Electronics Corp.
Rev. A.1 - Nov., 2008
3
1
APL5325
VIN
SHDN
GND
2
VOUT
SET
4
5
V
OUT
C
OUT
www.anpec.com.tw1

APL5325
Ordering and Marking Information
APL5325
Assembly Material
Handling Code
Temperature Range
Package Code
Package Code
B: SOT-23-5
Operating Ambient Temperature Range
I : -40 to 85 oC
Handling Code
TR : Tape & Reel
Assembly Material
L : Lead Free Device
G : Halogen and Lead Free Device
APL5325 B :
25RX XXXXXX - Date Code
Note: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte tin plate termination finish; which
are fully compliant with RoHS. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J-STD-020C for
MSL classification at lead-free peak reflow temperature. ANPEC defines “Green” to mean lead-free (RoHS compliant) and halogen
free (Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by
weight).
Absolute Maximum Ratings (Note 1)
Symbol Parameter Rating Unit
V
IN
V
SHDN
P
D
T
J
T
STG
T
SDR
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
VIN Supply Voltage (VIN to GND) -0.3 ~ 6.5 V
SHDN Input Voltage (SHDN to GND) -0.3 ~ 6.5 V
Power Dissipation Internally Limited W
Junction Temperature -40 ~ 150
Storage Temperature -65 ~ 150
Maximum Lead Soldering Temperature, 10 Seconds 260
o
C
o
C
o
C
Thermal Characteristics
Symbol Parameter Typical Value Unit
θJA
θJC
Thermal Resistance-Junction to Ambient
Thermal Resistance-Junction to Case
Note 2 : θJA is measured with the component mounted on a high effective thermal conductivity test board in free air.
(Note 2)
SOT-23-5
SOT-23-5
240
130
Recommended Operating Conditions
Symbol Parameter Range Unit
VIN VIN Supply Voltage 3 ~ 6 V
V
Output Voltage 0.8 ~ 5.5 V
OUT
I
VOUT Output Current 0 ~ 300 mA
OUT
CIN Input Capacitor 0.22 ~ 100
C
Output Capacitor 1.5 ~ 100
OUT
TJ Junction Temperature -40 ~ 125
Copyright ANPEC Electronics Corp.
Rev. A.1 - Nov., 2008
www.anpec.com.tw2
o
C/W
o
C/W
µF
µF
o
C

APL5325
Electrical Characteristics
Unless otherwise specified, these specifications apply over VIN = V
Typical values are at TA = 25oC.
OUT
+1V, I
=0~300mA, CIN = 1µF, C
OUT
= 2.2µF, TA = -40 to 85oC.
OUT
Symbol
Parameter Test Conditions
APL5325
Min. Typ. Max.
VIN Input Voltage 3 - 6 V
V
Output Voltage Range 0.8 - 5.5 V
OUT
IQ Quiescent Current I
V
Reference Voltage Measured on SET, VIN=3V, I
REF
Output Voltage Accuracy I
REG
REG
V
LINE
LOAD
DROP
Line Regulation
Load Regulation
Dropout Voltage
PSRR Power Supply Ripple Rejection Ratio f = 10kHz, I
Noise f = 80Hz to 100kHz, I
I
Current Limit 450 550 - mA
LIMIT
I
SHORT
Foldback Current V
=10mA ~300mA - 135 160
OUT
=10mA
OUT
=10mA -2 - +2 %
OUT
∆V
%/∆VIN, I
OUT
∆V
%/∆I
OUT
V
= 2.5V, I
OUT
V
= 3.3V, I
OUT
= 0V - 80 - mA
OUT
=10mA
OUT
OUT
= 300mA - 500 650
OUT
= 300mA - 300 400
OUT
= 300mA - 45 - dB
OUT
= 300mA - 160 -
OUT
- 0.8 - V
-0.06
- +0.06 %/V
-0.2 - +0.2 %/A
SHDN Input Voltage High 1.6 - SHDN Input Voltage Low
- - 0.4
Unit
µA
mV
µV
RMS
V
V
Shutdown VIN Supply Current SHDN = Low, V
Discharge MOSFET R
OUT
SHDN = Low - 60 -
DS(ON)
= 6V - 0.1 1
IN
SHDN Pull Low Resistance - 3 Over Temperature Threshold - 160 -
Over Temperature Hysteresis
SET Input Bias Current
- 40 V
=0.8V -100 - 100 nA
SET
Copyright ANPEC Electronics Corp.
Rev. A.1 - Nov., 2008
Ω
µA
MΩ
o
C
o
C
www.anpec.com.tw3

APL5325
Typical Operating Characteristics
Quiescent Current vs. Supply Voltage Quiescent Current vs. Junction Temperature
160
I
OUT
= 0mV
(µA)
140
120
Q
100
138
136
(µA)
Q
134
80
60
40
Quiescent Current, I
20
0
0 1 2 3 4 5 6 7
Supply Voltage, VIN (V)
PSRR vs. Frequency
0
VIN=3.3V, V
-10
C
=2.2µF,I
OUT
-20
-30
-40
-50
PSRR(dB)
-60
-70
-80
1000 10000 100000
=1.2V,
OUT
=300mA
OUT
Frequency(Hz)
132
130
Quiescent Current, I
128
126
-50 -25 0 25 50 75 100 125
Junction Temperature, TJ (oC)
Dropout Voltage vs. Output Current
400
V
=3.3V
350
(mV)
300
DROP
250
200
150
100
Dropout Voltage, V
OUT
TJ=125oC
TJ=75oC
50
TJ=25oC
0
0 100 200 300
Output Current, I
OUT
TJ=-50oC
(mA)
Dropout Voltage vs. Output Current
700
V
=2.5V
600
(mV)
500
DROP
400
300
200
Dropout Voltage, V
100
Copyright ANPEC Electronics Corp.
Rev. A.1 - Nov., 2008
OUT
TJ=75oC
TJ=125oC
TJ=25oC
0
0 100 200 300
Output Current, I
OUT
TJ=-50oC
(mA)
Current Limit vs. Junction Temperature
600
VIN=5V
550
(mA)
LIMIT
500
VIN=3.3V
450
Current Limit, I
400
-50 -25 0 25 50 75 100 125
Junction Temperature, TJ(oC)
www.anpec.com.tw4

APL5325
Typical Operating Characteristics (Cont.)
Loop Gain vs. Frequency
50
40
30
20
10
0
-10
Loop Gain (dB)
-20
-30
-40
VIN=3.3V, V
CIN=1µF, C
I
=300mA
OUT
OUT
OUT
=1.2V,
=2.2µF
I
OUT
1000 10000 100000 1000000
Frequency (Hz)
=100mA
Phase vs. Frequency
160
140
120
100
80
60
Phase (degree)
40
20
0
VIN=3.3V, V
CIN=1µF, C
I
OUT
OUT
OUT
=1.2V,
=2.2µF
=100mA
I
OUT
=300mA
1000 10000 100000 1000000
Frequency (Hz)
Copyright ANPEC Electronics Corp.
Rev. A.1 - Nov., 2008
www.anpec.com.tw5