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5V Low-Dropout Regulator for micro-P Application


Package | PIN: KTT | 5
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $3.47
10-24 $3.12
25-99 $2.91
100-249 $2.55
250-499 $2.39
500-749 $2.03
750-999 $1.71
1000+ $1.64


  • 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

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Texas Instruments  LP2957AISX/NOPB

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.