Ultra-Low-Noise, High PSRR, Low-Dropout, 300mA Linear Regulator
Copyright  ANPEC Electronics Corp.
Rev. A.1 - Sep., 2005
APL5312
www.anpec.com.tw1
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.
Features General Description
The APL5312 is a ultra low noise, low dropout linear
regulator, which operate from 2.3V to 6V input voltage
and deliver up to 300mA. Typical dropout voltage is
only 290mV at 300mA loading. Designed for use in
RF applications, the high PSRR 74dB and low noise
36µVRMS makes it an ideal choice.
Design with an internal P-channel MOSET pass
element, the APL5312 maintain a low supply current,
independent of the load current and dropout voltage.
Other features include thermal-shutdown protection
and current limit protection to ensure specified output
current and controlled short-circuit current. The
APL5312 regulator come in a miniature SOT23-5 and
SC70-5 package.
Applications
• Wide Operating Voltage: 2.3V~6V
• Low Dropout Voltage: 290mV @ 3V/300mA
• Fixed Output Voltages: 1.5V~3.5V
with step 100mV, 2.85V
• Guaranteed 300mA Output Current
• High PSRR: 74dB before 10KHz
• Low Output Noise: 36µVRMS at 100Hz
to 100KHz
• Current Limit Protection
• Controlled Short Circuit Current: 50mA
• Over Temperature Protection
• Stable with 1µF Capacitor for Any Load
• Excellent Load/Line Transient
• SOT23-5 and SC70-5 Packages
• Lead Free Available (RoHS Compliant)
• Cellular Phones
• Portable and Battery-Powered Equipment
• Wireless LANs
• GPS
Pin Configuration
V IN
GND
SHDN
V OUT
BP
APL5312
1
2
3 4
5
SOT23-5/
SC70-5