LM5155QDSSRQ1 - Texas Instruments

Manufacturer Part Number

LM5155QDSSRQ1

Manufacturer

Texas Instruments

Introduction

The LM5155QDSSRQ1 is an automotive-qualified DC-DC switching controller designed for power management applications.

Product Features and Performance

Step-up, step-up/step-down functionality for versatile power conversion

Capable of boost, flyback, and SEPIC topologies

Single output with one phase

Adjustable switching frequency from 100kHz to 2.2MHz

Maximum duty cycle of 93%

Supports clock synchronization

Incorporates soft start control feature

High-temperature operational range from -40°C to 150°C

Product Advantages

High flexibility in topology selection for diverse applications

Supports a broad input voltage range suitable for automotive power systems

High-frequency operation enables the use of smaller external components

Can drive high-efficiency power conversion without a synchronous rectifier

Automotive qualification ensures reliability and robustness in vehicular environments

Key Technical Parameters

Voltage supply (Vcc/Vdd) range: 2.97V to 45V

Output type: Transistor Driver

Topology options: Boost, Flyback, SEPIC

Output configuration: Positive

Number of outputs: 1

Frequency Switching: 100kHz to 2.2MHz

Quality and Safety Features

Automotive-grade product with AEC-Q100 qualification

Overtemperature protection with an operational range up to 150°C

Compatibility

Mounting type compatible with surface mount technology, specifically wettable flanks

Designed for use with 12-WFDFN exposed pad package

Application Areas

Automotive power systems

Power supply modules

LED drivers

Portable and battery-operated devices

Product Lifecycle

Current product status is active

Not indicated as nearing discontinuation

Availability of replacements or upgrades not specified

Several Key Reasons to Choose This Product

Versatile for multiple DC-DC conversion methods in a single chip

Enables compact and efficient power supply designs

Suitable for harsh automotive environments

High switching frequency facilitates the use of small external components, minimizing space

Texas Instruments' reputation for quality and support in the automotive industry