LD3985M27R - STMicroelectronics

Manufacturer Part Number

LD3985M27R

Manufacturer

STMicroelectronics

Introduction

The LD3985M27R is a low drop-out (LDO) linear voltage regulator designed for power-sensitive applications, delivering a fixed 2.7V output from an input up to 6V.

Product Features and Performance

Low dropout voltage: 0.1V @ 150mA

Fixed output voltage: 2.7V

Maximum output current: 150mA

Quiescent current: 150 µA

Supply current (max): 250 µA

Power supply rejection ratio (PSRR): 60dB to 50dB (1kHz to 10kHz)

Enable control feature for power-saving

Overcurrent and overtemperature protection for safety and reliability

Product Advantages

High efficiency at low dropout voltages

Low power consumption with low quiescent current

High PSRR for better noise rejection in sensitive applications

Small form factor (SOT-23-5 package) for space-constrained applications

Key Technical Parameters

Input voltage (max): 6V

Output voltage: 2.7V fixed

Dropout voltage (max): 0.1V @ 150mA

Output current: 150mA

Quiescent current: 150 µA

PSRR: 60dB ~ 50dB (1kHz ~ 10kHz)

Protection: Overcurrent, Overtemperature

Quality and Safety Features

Overcurrent protection to prevent damage under excessive load conditions

Overtemperature protection for operation in harsh environments

High reliability and robustness in various operating conditions

Compatibility

Designed for surface mount technology (SMT), compatible with automated assembly processes

Suitable for use in designs requiring the SOT-23-5 package format

Application Areas

Battery-powered devices

Portable electronics

Microcontroller power supply

IoT devices

Wireless communication modules

Product Lifecycle

Status: Active

The LD3985M27R is currently in active production with no immediate discontinuation planned. Replacements or upgrades will be announced in accordance with STMicroelectronics' product lifecycle management.

Several Key Reasons to Choose This Product

Optimized for low power consumption, ideal for battery-operated devices

High noise immunity with excellent PSRR ratings, enhancing device reliability in noise-sensitive applications

Compact package size for high-density PCB designs

Easy power management with enable control feature

Broad operating temperature range (-40°C to 125°C) suitable for various environments

Comprehensive protection features increasing system reliability