PAM3101
300mA High PSRR Low Dropout CMOS Linear Regulator
Features
n
Low Dropout Voltage: 180mV@300mA
(V
O
=3.3V)
n
Voltage Accuracy within ±2%
Output
n
voltage range: 2.5V to 5.5V
Supply
n
Quiescent Current:65μA Typ.
n
High PSRR: 70dB@1kHz
n
Excellent Line and Load Regulation
n
Fast Discharge
n
Limiting
Current
n
Circuit Protection
Short
n
Low Temperature Coefficient
n
Shutdown Current:0.5μA
n
Shutdown
Thermal
n
Saving Packages: SOT-23 , SOT-89,
Space
SC70 and DFN1.6x1.6
n
Package
Pb-Free
General Description
The PAM3101 series of positive voltage linear
regulators feature low quiescent current (65μA
Typ.) and low dropout voltage, making them ideal
for battery powered applications. Their high
PSRR make them useful in applications where
AC noise on the input power supply must be
suppressed. Space-saving SOT-23, SOT-89,
SC70 and DFN1.6x1.6-6L packages are
attractive for portable and handheld applications.
They have both thermal shutdown and current
limit features to prevent device failure from
extreme operating conditions. They are stable
with an output capacitor of 2.2μF or greater.
Applications
n
Phones
Cellular
n
Bluetooth Earphones
n
Cameras
Digital
n
Portable Electronics
n
WLANs
n
Players
MP3
Typical Application
IN
Block Diagram
OUT
VIN
VOUT
PAM3101
EN
C
IN
1μF
VIN
VOUT
GND
BYP
C
BYP
10nF
C
O
2.2μF
OverCurrent
Shutdown
EN
BYP
IN
Thermal
Protection
Amp
GND
VIN
VOUT
PAM3101
GND
C
IN
1μF
OUT
Bandgap
C
O
2.2μF
Power Analog Microelectronics, Inc
www.poweranalog.com
11/2010 Rev 2.5
1