APL5317 Datasheet, PDF (1/17 Pages) Anpec Electronics Coropration – Selectable Adjustable/Fixed Low Dropout 300mA Linear Regulator

APL5317
Selectable Adjustable/Fixed Low Dropout 300mA Linear Regulator
Features
• Wide Operating Voltage: 2.8~6V
• Low Dropout Voltage:
230mV(Typical) @ 300mA
• Guaranteed 300mA Output Current
• Two Modes for Setting Output Voltage
- Fixed Output Voltage: 1~5V
- Adjustable Output Voltage: 0.8~5.5V
• Current-Limit Protection with Foldback Current
• Internal Soft-Start
• 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
• Notebook and Personal Computers
Simplified Application Circuit
General Description
The APL5317 is a low dropout linear regulator which only
needs a single input voltage supply from 2.8 to 6V, and it
can deliver current up to 300mA to a set output voltage. It
can work with low ESR ceramic capacitors that make it
ideal for using in the battery-powered applications, such
as notebook computers and cellular phones. Its typical
dropout voltage is only 230mV at 300mA loading. The
APL5317 provides two output voltage operation modes,
the fixed output voltage mode and the adjustable output
voltage, controlled by the SET pin for setting the output
voltage. The fixed output voltage mode sets the output to
a preset voltage (only 1.2V available now) in the chip by
connecting SET pin to the ground, and the adjustable
output voltage mode needs two resistors as a voltage
divider connected to SET pin to define the output. The
current-limit with current foldback and thermal shutdown
functions protect the device against current over-loads
and over temperature. The APL5317 is available in a SOT-
23-5 package.
Pin Configuration
VIN 1
GND 2
SHDN 3
5 VOUT
4 SET
SOT-23-5
1. Fixed Output Voltage Mode
V_IN
C_IN
APL5317
1
VIN
5
VOUT
3 _SHDN
4
SET
GND
2
V_OUT
C_OUT
2. Adjustable Output Voltage Mode
V_IN
C_IN
APL5317
1
VIN
5
VOUT
3 _SHDN
4
SET
GND
2
V_OUT
C_OUT
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.
1
Rev. A.4 - Mar., 2009
www.anpec.com.tw