PAM3103 Datasheet, PDF (1/10 Pages) Power Analog Micoelectronics – 300mAAdjustable High PSRR CMOS Linear Regulator

PAM3103
300mA Adjustable High PSRR CMOS Linear Regulator
Features
n Low Dropout Voltage: 180mV@ 300mA
(V_O=3.3V)
n Accuracy within ±2%
n Quiescent Current: 65μA Typ.
n High PSRR: 67dB@100Hz
n Excellent Line/Load Regulation
n Fast Response
n Current Limiting
n Short Circuit Protection
n Low Temperature Coefficient
n Shutdown Current: 0.5μA
n Thermal Shutdown
n Space Saving Packages SOT23-5 and
SC70-5
n Pb-Free Package
Applications
n Cordless Phone
n Cellular Phone
n Bluetooth Earphone
n Digital Camera
n Portable Electronics
n WLAN
n MP3 Player
General Description
The PAM3103 is a positive, adjustable linear
regulator. It features low quiescent current (65μA
Typ.) and low dropout voltage, making it ideal for
battery powered applications. The output voltage
is adjustable from 1.2V through 5V. Its high PSRR
makes it useful in applications that require AC
noise suppression on the input power supply.
Space-saving SOT23-5 and SC70-5 packages
are attractive for portable and handheld
applications. It has both thermal shutdown and a
current limit features to prevent device failure
under extreme operating conditions. It is stable
with an output capacitor of 2.2μF or greater.
Typical Application
Block Diagram
IN
1 _VIN
5
VOUT
OUT
PAM3103
EN
3
C_IN
1μF
GND
2
ADJ 4
R1 _CC
100pF
C_O
2.2μF
R2
VIN
EN
OverCurrent
Shutdown
Thermal
Protection
V_O= V * _REF ( R1+ R2) /R2
Reference
Error Amp
VOUT
ADJ
GND
Power Analog Microelectronics,Inc
www.poweranalog.com
1
09/2008 Rev 1.2