TPPM0125 Datasheet, PDF (1/13 Pages) Texas Instruments – 150-mA LOW DROPOUT REGULATOR WITH POK

TPPM0125
150ĆmA LOW DROPOUT REGULATOR WITH POK
features
D Low Dropout Voltage Regulator, 1.2-V
D 150-mA Load Current Capability
D Power Okay (POK) Function
D Load Independent, Low Ground
Current,150-µA
D Current Limiting
D Thermal Shutdown
D Low Sleep State Current (Off Mode)
D Fast Transient Response
D Low Variation Due to Load and Line
Regulation
D Output Stable With Low ESR Capacitors
D TTL Logic Controlled Enable Input
SLVS388 − JULY 2001
DBV PACKAGE
(TOP VIEW)
V_I
1
5
V_O
GND 2
EN
3
4
POK
applications
D Processor Powerup Sequencing
D Palmtop Computers, Laptops, and
Notebooks
description
The TPPM0125 is a low dropout voltage regulator with an output tolerance of ±2% over the operating range.
The device is optimized for low noise applications and has a low quiescent current (enable <0.8 V). The device
has a low dropout voltage at full load (150 mA). The power okay function monitors the output voltage and
indicates when an error occurs in the system (active low). In the event of an output fault such as overcurrent,
thermal shutdown, or dropout, the power okay output is pulled low (open drain).
The TPPM0125 has a fast transient response recovery capability in the event of load transition from heavy load
to light load. The device also minimizes overshoot during this condition. During power down, the output
capacitor and load are de-energized through the internal active shutdown clamp, which is turned on when the
device is disabled.
The TPPM0125 requires a small output capacitor for stability with low ESR. An input capacitor is not required
unless the bulk ac capacitor is placed away from the device or the power supply is a battery. In this situation,
a 1-µF capacitor is recommended for the application. Low ESR ceramic capacitors may be used with the device
to reduce board space in power applications, a key concern in hand-held wireless devices.
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright  2001, Texas Instruments Incorporated
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