SNVS102C – JUNE 1998 – REVISED APRIL 2013
LP2957/LP2957A 5V Low-Dropout Regulator for µP Applications
Check for Samples: LP2957, LP2957A
•2 5V Output within 1.4% Over Temperature (A
• Easily Programmed for Snap-On/Snap-Off
• Ensured 250 mA Output Current
• Extremely Low Quiescent Current
• Low Input-Output Voltage Required for
• 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
• High-Efficiency Linear Regulator
• Battery-Powered Regulator
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
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
The accuracy of the 5V output is ensured at room
temperature and over the full operating temperature
The LP2957 is available in the five-lead TO-220 and
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
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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PRODUCTION DATA information is current as of publication date.
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