LD3985M30R - STMicroelectronics

Manufacturer Part Number

LD3985M30R

Manufacturer

stmicroelectronics

Introduction

The LD3985M30R is a linear low drop-out (LDO) regulator designed for power management, primarily in low-power applications.

Product Features and Performance

Low dropout voltage of 0.1V at 150mA load

Stable with low ESR capacitors

High power supply rejection ratio (PSRR) of 60dB to 50dB across 1kHz to 10kHz

Fixed output voltage of 3V

Output current capacity of 150mA

Low quiescent current of 150 µA

Maximum supply current of 250 µA

Product Advantages

High efficiency at low voltage levels

Minimal power loss due to low dropout

Robust thermal and current management

Suitable for battery-powered devices due to low quiescent current

Key Technical Parameters

Voltage Input (Max): 6V

Voltage Output (Min/Fixed): 3V

Current Output: 150mA

Current Quiescent (Iq): 150 µA

Current Supply (Max): 250 µA

Dropout Voltage: 0.1V @ 150mA

Operating Temperature: -40°C to 125°C

Quality and Safety Features

Over-current protection

Over-temperature protection

Supports safe operation in wide temperature ranges

Compatibility

Compatible with standard surface mount techniques (SOT-23-5 package)

Utilizes low ESR ceramic capacitors for stability

Application Areas

Mobile Phones

Portable Media Players

Handheld Devices

Wireless Communication Devices

Product Lifecycle

Currently in active production

Not nearing discontinuation

Future upgrades or replacements available to support prolonged lifecycle

Several Key Reasons to Choose This Product

High reliability and robust protection features ensure device safety under various conditions

Very low dropout enhances efficiency for battery-dependent applications

Ultra-low quiescent current beneficial for prolonging battery life in portable devices

High PSRR offers superior noise rejection in sensitive applications

Broad operating temperature range suitable for industrial applications

Simple external components requirements facilitate easy implementation and lower overall cost