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LP2957, LP2957A
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SNVS102C –JUNE 1998–REVISED APRIL 2013
LP2957/LP2957A 5V Low-Dropout Regulator for µP Applications
Check for Samples: LP2957, LP2957A
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FEATURES
DESCRIPTION
The LP2957 is a 5V micropower voltage regulator
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• 5V Output within 1.4% Over Temperature (A
with electronic shutdown, error flag, very low
Grade)
quiescent current (150 µA typical at 1 mA load), and
• Easily Programmed for Snap-On/Snap-Off
very low dropout voltage (470 mV typical at 250 mA
Output
load current).
• Ensured 250 mA Output Current
Output can be wired for snap-on/snap-off operation to
• Extremely Low Quiescent Current
eliminate transition voltage states where µP operation
may be unpredictable.
• Low Input-Output Voltage Required for
Regulation
Output crowbar (50 mA typical pull-down current) will
• Reverse Battery Protection
bring down the output quickly when the regulator
snaps off or when the shutdown function is activated.
• Extremely Tight Line and Load Regulation
The part has tight line and load regulation (0.04%
• Very Low Temperature Coefficient
typical) and low output temperature coefficient (20
• Current and Thermal Limiting
ppm/°C typical).
• Error Flag Signals when Output is out of
The accuracy of the 5V output is ensured at room
Regulation
temperature and over the full operating temperature
range.
APPLICATIONS
The LP2957 is available in the five-lead TO-220 and
• High-Efficiency Linear Regulator
DDPAK/TO-263 packages.
• Battery-Powered Regulator
Package Outline
Top View Top View
Figure 1. Bent, Staggered Leads Figure 2. Plastic Surface Mount Package
5-Lead TO-220 Package 5-Lead DDPAK/TO-263 Package
See Package Number NDH0005D See Package Number KTT0005B
Side View
Figure 3. See Package Number KTT0005B
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
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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.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 1998–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
