L5991A -

Manufacturer Part Number

L5991A

Manufacturer

stmicroelectronics

Introduction

The L5991A is a high-performance, high-efficiency, and highly integrated step-up/step-down DC-DC switching controller from STMicroelectronics. It is designed to provide a regulated output voltage from an unregulated input voltage source, making it suitable for a wide range of power supply applications.

Product Features and Performance

Operates from an input voltage range of 7.6V to 20V

Provides up to 1MHz switching frequency

Supports a maximum duty cycle of 93%

Includes a synchronous rectifier for improved efficiency

No clock synchronization required

Offers current limiting, frequency control, and soft-start features

Operates over a wide temperature range of -40°C to 150°C (junction temperature)

Available in a 16-pin DIP package

Product Advantages

High efficiency and power density

Wide input voltage range

Flexible topologies (step-up, step-down, and isolation-capable)

Advanced control features for enhanced performance and reliability

Robust thermal management capabilities

Key Reasons to Choose the L5991A

Exceptional power conversion efficiency

Versatile design for various power supply applications

Reliable operation across a broad temperature range

Comprehensive protection and control features

Space-saving through-hole package

Quality and Safety Features

Robust design for industrial and automotive environments

Thermal protection and current limiting for safe operation

Compliance with relevant safety and EMC standards

Compatibility

The L5991A is a general-purpose DC-DC switching controller suitable for a wide range of power supply designs, including industrial, automotive, and consumer electronics applications.

Application Areas

Industrial automation and control systems

Automotive electronics and power management

Telecommunications and networking equipment

Consumer electronics and household appliances

Product Lifecycle

The L5991A is an obsolete product, meaning it is no longer in active production. However, there may be equivalent or alternative models available from STMicroelectronics or other manufacturers. Customers are advised to contact our website's sales team for more information on current product offerings and suitable replacement options.