LP5951 Datasheet, PDF (1/10 Pages) National Semiconductor (TI) – Micropower, 150mA Low-Dropout CMOS Voltage Regulator

June 2006
LP5951
Micropower, 150mA Low-Dropout CMOS Voltage
Regulator
General Description
The LP5951 regulator is designed to meet the requirements
of portable, battery-powered systems providing a regulated
output voltage and low quiescent current. When switched to
shutdown mode via a logic signal at the Enable pin, the
power consumption is reduced to virtually zero.
The LP5951 is designed to be stable with small 1µF/1.5µF
ceramic capacitors.
The LP5951 also features internal protection against short-
circuit currents and over-temperature conditions.
Performance is specified for a -40˚C to 125˚C temperature
range.
The device is currently available in SOT23-5 package and
will be available in SC70-5 package soon.
The device is available in fixed output voltages in the range
of 1.3V to 3.3V. For availability, please contact your local
NSC sales office.
Features
n Excellent line transient response: ±2mV typ.
n Excellent PSRR: -60dB at 1kHz typ.
n Low quiescent current of 29µA typ.
n 1.8 to 5.5V input voltage range
n Small SOT23-5 package
n Fast turn-on time of 30µs typ.
n Typ. < 1nA quiescent current in shutdown
n Guaranteed 150mA output current
n Output voltage range: 1.3V to 3.3V
n Logic controlled enable 0.4V/0.9V
n Good load transient response of 50mVpp typ.
n Thermal-overload and short-circuit protection
n -40˚C to +125˚C junction temperature range
Applications
n General purpose
Typical Application Circuit
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