LP2957_15 Datasheet, PDF (1/24 Pages) Texas Instruments – 5V Low-Dropout Regulator for μP Applications

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