High-performance low-dropout (LDO) linear regulators

with wide input range and low power consumption

A comprehensive range of industry-standard regulators

ST's high-performance low-dropout (LDO) linear regulators offer a combination of benefits to meet the stringent performance requirements of the industrial and automotive markets. ST offers an ever-expanding selection of high-performance LDO regulators for various environments, including automotive, industrial, and consumer electronics. These regulators feature low quiescent current, low noise, high PSRR (power supply ripple rejection), and come in compact packages to support the development of new solutions for various environments, including automotive, industrial, and consumer electronics.

Portable and wearable

Smoke detectors

Industrial

ADAS

Use cases and application examples

Decrease noise effect in wired and wireless communication systems

ST’s LDO ensures a stable and noise-free power source for sensitive analog circuits.

Ideal choice for analog or digital noise-sensitive applications

ST’s LDO features a high power-supply rejection ratio (PSRR) to effectively shield its load from the potentially noisy switching regulator source.

Use LDO for post regulation in automotive environments

Ultralow dropout voltage, low quiescent current, and low-noise characteristics make it an ideal choice for secondary regulation in automotive applications.

Discover our offer

STMicroelectronics is at the forefront of innovation, offering a comprehensive range of low-dropout regulators (LDOs) designed to meet the stringent requirements of modern applications. Our portfolio includes the LD56020, LD57100, ST730/ST732, LDQ40/LDL40/LDH40, LD39100/LD49100, and LDLN050. Each LDO is engineered to deliver exceptional performance across various environments, including automotive, industrial, and consumer electronics.

Industrial grade

LD56020

Ultralow input voltage, 200 mA, high PSRR.

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Industrial grade

LD57100

Ultralow dropout LDO, 1 A, with bias.

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Industrial grade

ST730/ST732

Low-dropout LDO, 300 mA, 28 V, very low IQ .

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Industrial and automotive grades

LDQ40/LDL40/LDH40

Very low IQ 2 µA, 250/200 mA, 40 V input.

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Industrial and automotive grades

LD39100/LD49100

Low quiescent current low dropout LDO, 1 A.

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Industrial grade

LDLN050

Low-dropout LDO, 500 mA, low noise.

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Key features and benefits

High accuracy: for post regulation down to 1 V.
Very low consumption: enhanced lifetime of battery-powered devices and reduced power dissipation.
High PSRR: keep the voltage constant under different load currents.
Ultralow noise: signal integrity in low noise applications.
Small packages: space saving in the application board.