LD3985M47R - STMicroelectronics

Manufacturer Part Number

LD3985M47R

Manufacturer

stmicroelectronics

Introduction

Low Dropout Voltage Regulator suitable for applications requiring low voltage power supply

Product Features and Performance

Low dropout voltage of 0.1V at 150mA load

Fixed output voltage of 4.7V

Single regulator design for simplicity

Low quiescent current of 150 µA

High PSRR of 60dB at 1kHz to 50dB at 10kHz ensuring good noise rejection

Over current and over temperature protection for safety and reliability

Wide operating temperature range from -40°C to 125°C

Product Advantages

Ultra low-dropout for efficient use in battery-powered devices

Stable output with low output voltage variability

Robust protection features increase product lifespan

High PSRR minimizes voltage fluctuations due to varying loads

Low quiescent current extends battery life in portable applications

Key Technical Parameters

Voltage Input (Max): 6V

Voltage Output (Min/Fixed): 4.7V

Current Output: 150mA

Voltage Dropout (Max): 0.1V @ 150mA

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

Operating Temperature: -40°C ~ 125°C

Quality and Safety Features

Protects against over current conditions

Thermal shutdown feature to prevent overheating

Compatibility

Control Feature: Enable

Output Configuration: Positive

Output Type: Fixed

Mounting Type: Surface Mount

Package/Case: SC-74A, SOT-753

Device Package: SOT-23-5

Application Areas

Battery-powered devices

Portable electronics

Microcontroller power supplies

Low power instrumentation

Product Lifecycle

Active status, not nearing discontinuation

Availability of replacements or upgrades not specified

Several Key Reasons to Choose This Product

Efficient power conversion for prolonged battery life

Minimal dropout allows for stable operation close to battery voltage

Broad compatibility with surface mount technology for easy integration

Reliable operation even in extreme temperature conditions

Excellent noise suppression capabilities suitable for sensitive applications