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LMS5258MF-1.2-LMS5258MFX-1.2
150mA, µCap, Low Dropout Voltage Regulator with Power Good
LMS5258
150mA, µCap, Low Dropout Voltage Regulator with
Power Good
General DescriptionThe LMS5258isa µCap, precise CMOS voltage regulator
with power good output. providesupto 150mA and consumesa typicalof 10nAin
shutdown mode. The LMS5258 output stageis designed
witha push pull outputfor faster transient response.
The LMS5258is optimizedto work with low value, low cost
ceramic capacitors. The output typically require only 1µFof
output capacitancefor stability. The enablepin canbe tiedto
VINfor easy device layout.
The LMS5258is designedfor portable, battery powered
equipment applications with small space requirements.
The LMS5258is availableina 5-pin SOT-23 package. Per-
formanceis specifiedfor the −40˚Cto +125˚C temperature
range andis availableina fixed 1.2V. For other output
voltage options, please contact National Semiconductor.
Features Power good indicator Stability with low ESR capacitors Low ground current: 120µA 150mA output current "Zero" shutdown mode current Fast transient response Auto Discharge Thermal shutdown Current limiting TTL-Logic-controlled enable input Pin-to-pin replacementfor Mic™ 5258
Applications Processor power-up sequencing Laptop, notebook and palm top computer PCMCIA VCC and VPP regulation switching
Typical ApplicationPin Description
Pin Number Pin Name Pin Function
1VIN Input Voltage GND Ground EN Enable Input Logic,
Logic High= Enabled
Logic Low= Shutdown
(Donot leave open) PG Power Good Output
5VOUT Output Voltage
February 2003
LMS5258
150mA,
µCap,
Low
Dropout
oltage
Regulator
with
Power
Good
