STMicroelectronics – Low-power LDO ideal for use in battery-powered applications


The STLQ020 from STMicroelectronics is a Low-Dropout (LDO) voltage regulator which features low power consumption in stand-by and shut-down modes, to help extend run-time between charges in battery-powered applications.

The STLQ020 linear regulator, which operates from an input voltage ranging from 2V to 5.5V, supplies a maximum output current of 200mA. The typical dropout voltage at the maximum load is 160mV.

The power performance of the STLQ020 is particularly impressive when the host application is in stand-by mode. Quiescent current is just 0.3μA at no load. The STLQ020 may be put in shut-down mode via an Enable pin, reducing total current to 1nA.

The low power consumption of the STLQ020 LDO does not compromise its ability to provide a stable, accurate output. It offers a fast response to transient loads, and has a good Power Supply Rejection Ratio (PSRR) thanks to its adaptive biasing circuit.


  • Output-voltage accuracy:
    - ±2% at room temperature
    - ±3% across full operating-temperature range
  • Fixed output voltage versions across range from 0.8V to 4.5V in 50mV steps
  • Adjustable-output version also available
  • Over-current and thermal protection functions
  • Operating-temperature range: -40°C to 125°C


  • Image sensors
  • Wearable accessories
  • Healthcare devices
  • Metering equipment

Evaluate the STLQ020 LDO voltage regulator alongside three other LDOs: the LDBL20, LD39130S, and LDLN025.

Orderable Part Number: STEVAL-LDO001V1