Micropower, 150mA Low-Dropout CMOS Voltage Regulator
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The LP5951 regulator is designed to meet the requirements of portable, battery-powered systems providing a regulated output voltage and low quiescent current. When switched to shutdown mode via a logic signal at the Enable pin, the power consumption is reduced to virtually zero.

The LP5951 is designed to be stable with small 1 microF/1.5microF ceramic capacitors.

The LP5951 also features internal protection against short-circuit currents and over-temperature conditions.

Performance is specified for a -40°C to 125°temperature range. The device is available in SOT23-5 and SC70-5 package.

The LP5951 evaluation board is designed to enable independent evaluation of the LP5951 electrical performance. Each board is pre-assembled and tested in the factory. The evaluation kits are available in two options: LP5951MF-1.8EV and LP5951MF-2.5EV. For other voltage and package options, the device can be ordered from the LP5951 product folder on TI's website. The board offers two different assembly options: SC70-5 package (MG) on top side (TOP) or SOT23-5 package on bottom side (BOT) of the board. Only one side will be assembled at a time.

  • Excellent line transient response: plus or minus 2mV typ.
  • Excellent PSRR: -60dB at 1kHz typ.
  • Low quiescent current of 29 microA typ.
  • 1.8 to 5.5V input voltage range
  • Small SC70-5 and SOT23-5 packages
  • Fast turn-on time of 30 mcro seconds typ.
  • Typ. < 1nA quiescent current in shutdown
  • Guaranteed 150mA output current
  • Output voltage range: 1.3V to 3.3V
  • Logic controlled enable 0.4V/0.9V
  • Good load transient response of 50mVpp typ.
  • Thermal-overload and short-circuit protection
  • -40°C to +125°C junction temperature range


  • General Purpose


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Micropower, 150mA Low-Dropout CMOS Voltage Regulator


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Technical documentation
User guides (1)
Title Type Size (KB) Date
PDF 132 30 Apr 2013
More literature (1)
Title Type Size (KB) Date
PDF 38 02 Jan 2019

TI Devices (1)

Part Number Name Product Family
LP5951  150-mA, low-IQ, low-dropout voltage regulator with enable  Power management 

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