TPPM0303 Datasheet, PDF (1/10 Pages) Texas Instruments – 250-mA LOW-DROPOUT REGULATOR WITH AUXILIARY POWER MANAGEMENT

D Automatic Input Voltage Source Selection
D Glitch-Free Regulated Output
D 5-V Input Voltage Source Detector With
Hysteresis
D 250-mA Load Current Capability With 5-V or
3.3-V Input Source
D Low r_DS(on) Auxiliary Switch
TPPM0303
250-mA LOW-DROPOUT REGULATOR
WITH AUXILIARY POWER MANAGEMENT
SLVS364 – FEBRUARY 2001
D PACKAGE
(TOP VIEW)
5VAUX
1
5VCC
2
3.3VOUT
3
3.3VAUX
4
8 NC
7 GND
6 NC
5 NC
description
The TPPM0303 is a low-dropout regulator with auxiliary power management that provides a constant 3.3-V
supply at the output capable of driving a 250-mA load.
The TPPM0303 provides a regulated power output for systems that have multiple input sources and require a
constant voltage source with a low-dropout voltage. This is a single output, multiple input, intelligent power
source selection device with a low-dropout regulator for either 5VCC or 5VAUX inputs, and a low-resistance
bypass switch for the 3.3VAUX input.
Transitions may occur from one input supply to another without generating a glitch outside of the specification
range on the 3.3-V output. The device has an incorporated reverse-blocking scheme to prevent excess leakage
from the input terminals in the event that the output voltage is greater than the input voltage.
The input voltage is prioritized in the following order: 5VCC, 5VAUX, and 3.3VAUX.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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Copyright © 2001, Texas Instruments Incorporated
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