APL5501/2/3
Low IQ, Low Dropout 500mA Fixed Voltage Regulator
Features
Design with an internal P-channel MOSFET pass
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Low Noise : 50mVRMS (100Hz to 100kHz)
transistor, the APL5501/2/3 maintains a low supply
current, independent of the load current and dropout
voltage. Other features include reverse current
protection, thermal-shutdown protection, current limit
protection to ensure specified output current andcon-
trolled short-circuit current. The APL5501/2/3 regu-
lator comes in a miniature SOT-23-5, SOT-89, SOT-
89-5, SOT-223, SO-8, TO-252 and TO-252-5
packages.
Low Quiescent Current : 50mA (No load)
Low Dropout Voltage : 170mV (@500mA)
Very low Shutdown Current : < 0.5uA
Fixed Output Voltage : 1.3V ~ 3.4V
Stable with 4.7uF Output Capacitor
Stable with Aluminum, Tantalum or Ceramic
Capacitors
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Reverse Current Protection
No Protection DiodesNeeded
Pin Configuration
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Built in Thermal Protection
APL5501
Built in Current Limit Protection
Controlled Short Circuit Current : 150mA
Fast Transient Response
BP
GND
SHDN
T A B i s G N D
5
1
4
3
1
2
3
Short Setting Time
2
SOT-23-5, SOT-89, SOT-89-5, SOT-223, SO-8,
TO-252 and TO-252-5 Packages
V IN
VIN
G N D
V O U T
VOUT
GND
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Lead FreeAvailable (RoHSCompliant)
SOT-89 (Top View)
SOT-89-5(TopView)
Applications
IN
GND
GND
SHDN
1
2
3
4
8
7
6
5
OUT
GND
GND
BYP
VIN
1
5
4
VOUT
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Notebook Computer
GND
2
3
PDA or Portable Equipments
Noise-Sensitive Instrumentation Systems
SHDN
BP
General Description
SO-8 (Top View)
SOT-23-5(TopView)
The APL5501/2/3 is micropower, lownoise, low drop-
out linear regulator. Operate from 2.7V to 6V input
voltage and deliver up to 500mA. Typical output noise
GND
VOUT
BP
is just 50mVRMS with the addition of an external 0.1mF
bypass capacitor in BP pin and typical dropout volt-
age is only 170mV at 500mA loading . Designed for
use in battery-powered system, the low 50uA quies-
cent current makes it an ideal choice.
GND
SHDN
VIN
1
2
3
VIN
VOUT
TO-252(TopView)
TO-252-5(TopView)
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 ã ANPEC Electronics Corp.
1
www.anpec.com.tw
Rev. B.2 - May., 2005
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
