LMS5258 Datasheet, PDF (1/9 Pages) National Semiconductor (TI) – 150mA, Cap, Low Dropout Voltage Regulator with Power Good

February 2003
LMS5258
150mA, µCap, Low Dropout Voltage Regulator with
Power Good
General Description
The LMS5258 is a µCap, precise CMOS voltage regulator
with power good output.
It provides up to 150mA and consumes a typical of 10nA in
shutdown mode. The LMS5258 output stage is designed
with a push pull output for faster transient response.
The LMS5258 is optimized to work with low value, low cost
ceramic capacitors. The output typically require only 1µF of
output capacitance for stability. The enable pin can be tied to
V_IN for easy device layout.
The LMS5258 is designed for portable, battery powered
equipment applications with small space requirements.
The LMS5258 is available in a 5-pin SOT-23 package. Per-
formance is specified for the −40˚C to +125˚C temperature
range and is available in a fixed 1.2V. For other output
voltage options, please contact National Semiconductor.
Features
n Power good indicator
n Stability with low ESR capacitors
n Low ground current: 120µA
n 150mA output current
n "Zero" shutdown mode current
n Fast transient response
n Auto Discharge
n Thermal shutdown
n Current limiting
n TTL-Logic-controlled enable input
n Pin-to-pin replacement for Mic™ 5258
Applications
n Processor power-up sequencing
n Laptop, notebook and palm top computer
n PCMCIA V_CC and V_PP regulation switching
Typical Application
Pin Description
Pin Number
1
2
3
Pin Name
V_IN
GND
EN
4
PG
5
V_OUT
© 2003 National Semiconductor Corporation DS200424
20042419
Pin Function
Input Voltage
Ground
Enable Input Logic,
Logic High = Enabled
Logic Low = Shutdown
(Do not leave open)
Power Good Output
Output Voltage
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