LDS3985M33R - STMicroelectronics

Manufacturer Part Number

LDS3985M33R

Manufacturer

stmicroelectronics

Introduction

The LDS3985M33R is a low drop-out linear regulator designed for power management, providing a stable output voltage with minimal input-to-output voltage difference.

Product Features and Performance

Low dropout voltage: 0.25V at 300mA load

Fixed 3.3V output voltage

Up to 300mA output current

Quiescent current of 150 µA, maximizing battery life

Supply current of 300 µA

Excellent PSRR: 55dB ~ 50dB from 1kHz to 10kHz, ensuring stable output under varying load conditions

Shutdown feature for power saving

Over Current and Over Temperature protection for enhanced safety

Operates in a wide temperature range: -40°C to 125°C

Product Advantages

High efficiency with low dropout voltage

Minimal power loss

Extended battery life due to low quiescent current

Robust protection features

Suitable for battery-powered applications

Key Technical Parameters

Voltage - Input (Max): 6V

Voltage - Output (Min/Fixed): 3.3V

Current - Output: 300mA

Voltage Dropout (Max): 0.25V @ 300mA

Current - Quiescent (Iq): 150 µA

PSRR: 55dB ~ 50dB (1kHz ~ 10kHz)

Quality and Safety Features

Built-in Over Current and Over Temperature protection

Designed for high reliability and safety

Compatibility

Compatible with various digital and analog circuits due to its fixed 3.3V output

Mountable on Surface Mount boards with SC-74A, SOT-753 package

Application Areas

Ideal for portable devices, such as smartphones and tablets

Suitable for wireless communication systems

Useful in microcontroller power supply applications

Product Lifecycle

The LDS3985M33R remains active, suggesting ongoing production and support

No immediate discontinuation notice, ensuring product availability for new designs

Several Key Reasons to Choose This Product

Low dropout voltage enhances efficiency

Low quiescent current contributes to battery saving

Wide operating temperature range for reliability under varying conditions

Built-in safety features ensure circuit protection

Optimized for portable and battery-powered devices

Active product status indicates continued support and availability