LDS3985M18R - STMicroelectronics

Manufacturer Part Number

LDS3985M18R

Manufacturer

STMicroelectronics

Introduction

Low Drop Out (LDO) linear voltage regulator

Product Features and Performance

Single LDO regulator

Positive fixed output

Up to 300mA output current

Tape & Reel packaging for automated assembly

55dB to 50dB Power Supply Rejection Ratio (PSRR) from 1kHz to 10kHz

Low dropout voltage of 0.25V at 300mA load

Product Advantages

High PSRR for noise suppression

Low quiescent current of 150 µA for power saving

Shutdown control feature for system power management

Thermal and over-current protection

Key Technical Parameters

Input Voltage (Max): 6V

Output Voltage (Fixed): 1.8V

Dropout Voltage (Max): 0.25V

Output Current: 300mA

Quiescent Current (Iq): 150 µA

Supply Current (Max): 300 µA

Operating Temperature Range: -40°C to 125°C

PSRR: 55dB at 1kHz and 50dB at 10kHz

Shutdown Control Feature

Protection Features: Over Current, Over Temperature

Quality and Safety Features

Protection against over-current and over-temperature conditions

Compatibility

Compatible with SC-74A, SOT-753 mounting footprint

Application Areas

Power management in consumer electronics, medical devices, and industrial control systems

Product Lifecycle

Status: Active, not nearing discontinuation

Ongoing availability with potential for future replacements or upgrades

Several Key Reasons to Choose This Product

Stable voltage supply with low dropout performance

Energy-efficient due to low Iq

Robust protection features ensure device longevity

High PSRR reduces power supply noise

Wide operating temperature range making it suitable for harsh environments

Active product status ensures long-term availability and support