PAM3103
300mA Adjustable High PSRR CMOS Linear Regulator
Features
n
Low Dropout Voltage: 180mV@ 300mA
( V
O
= 3.3V)
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Accuracy within ±2%
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Quiescent Current: 65 μ A Typ.
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High PSRR: 67dB@100Hz
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Excellent Line/Load Regulation
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Fast Response
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Current Limiting
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Short Circuit Protection
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Low Temperature Coefficient
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Shutdown Current: 0.5 μ A
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Thermal Shutdown
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Space Saving Packages SOT2 3-5 and
SC70-5
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Pb-Free Package
General Description
The PAM3103 is a positive, adjustable linear
regulator. It features low quiescent current (65 μ A
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 2.2 μ F or greater.
Applications
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n
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Cordless Phone
Cellular Phone
Bluetooth Earphone
Digital Camera
Portable Electronics
WLAN
M P 3 Player
Typical Application
IN
1
5
Block Diagram
VIN
OUT
VOUT
VIN
EN
GND
2
VOUT
PAM3103
3
ADJ 4
R1
C
C
100pF
OverCurrent
Shutdown
C
IN
1μF
R2
C
O
2.2 μ F
EN
Thermal
Protection
ADJ
Error Amp
V
O
=
V
REF
*
(
R1
+
R2
)
/R2
Reference
GND
Power Analog Microelectronics
,
Inc
www.poweranalog.com
09/2008 Rev 1.2
1
PAM [ POWER ANALOG MICOELECTRONICS ]
