ST1S31PUR - STMicroelectronics

Manufacturer Part Number

ST1S31PUR

Manufacturer

stmicroelectronics

Introduction

The ST1S31PUR is a high-efficiency, adjustable step-down (buck) DC-DC switching regulator capable of delivering up to 3A of output current.

Product Features and Performance

High efficiency step-down regulator

Adjustable output voltage from 0.8V to 5.5V

Capable of delivering 3A output current

Input voltage range from 2.8V to 5.5V

Synchronous rectification for improved efficiency

Operating frequency of 1.5MHz allows for small external components

High temperature operation from -40°C to 150°C

Product Advantages

Optimized for portable applications with its wide input voltage range

Low dropout performance enhances battery life

Compact 8-QFN (3x3) package saves board space

Thermal shutdown and short-circuit protection enhance reliability

Key Technical Parameters

Topology: Buck

Number of Outputs: 1

Voltage - Input (Min): 2.8V

Voltage - Input (Max): 5.5V

Voltage - Output (Min/Fixed): 0.8V

Voltage - Output (Max): 5.5V

Current - Output: 3A

Frequency - Switching: 1.5MHz

Quality and Safety Features

Thermal shutdown protection

Overcurrent protection

Synchronous rectification for efficient operation

Compatibility

Compatible with a wide range of input voltages

Designed for surface mount technology (SMT)

Application Areas

Portable devices

Power management solutions

Consumer electronics

Industrial power supplies

Product Lifecycle

Product Status: Active

Not nearing discontinuation

Availability of replacements or upgrades is maintained by stmicroelectronics

Several Key Reasons to Choose This Product

Delivers high efficiency which is crucial for battery-powered devices

Supports a broad range of input and output voltages for flexible designs

Offers thermal and current protections increasing system reliability

The compact design facilitates integration into size-constrained applications

High switching frequency enables the use of smaller passive components

Suitable for industrial-grade applications with its wide operating temperature range