描述

The TPS54331 device is a 28-V, 3-A non-synchronous buck converter that integrates a low RDS(on) high-side MOSFET. To increase efficiency at light loads, a pulse skipping Eco-mode feature is automatically activated. Furthermore, the 1-µA shutdown supply-current allows the device to be used in battery-powered applications. Current mode control with internal slope compensation simplifies the external compensation calculations and reduces component count while allowing the use of ceramic output capacitors. A resistor pider programs the hysteresis of the input undervoltage lockout. An overvoltage transient protection circuit limits voltage overshoots during startup and transient conditions. A cycle-by-cycle current-limit scheme, frequency foldback and thermal shutdown protect the device and the load in the event of an overload condition. The TPS54331 device is available in an 8-pin SOIC package and 8-pin SO PowerPAD package that have been internally optimized to improve thermal performance.

特性

·         3.5 to 28-V Input Voltage Range

·         Adjustable Output Voltage Down to 0.8 V

·         Integrated 80-mΩ High-Side MOSFET 
Supports up to 3-A Continuous Output 
Current

·         High Efficiency at Light Loads With a 
Pulse Skipping Eco-mode™

·         Fixed 570 kHz Switching Frequency

·         Typical 1-µA Shutdown Quiescent 
Current

·         Adjustable Slow-Start Limits Inrush 
Currents

·         Programmable UVLO Threshold

·         Overvoltage Transient Protection

·         Cycle-by-Cycle Current Limit, Frequency Fold 
Back, and Thermal Shutdown Protection

·         Available in Easy-to-Use SOIC8 Package or 
Thermally Enhanced SOIC8 PowerPAD™ Package

·         Supported by WEBENCH® Software Tool 
(www.TI.com/WEBENCH)

·         APPLICATIONS

o    Consumer Applications such as Set-Top Boxes, 
CPE Equipment, LCD Displays, Peripherals, and 
Battery Chargers

o    Industrial and Car-Audio Power Supplies

o    5-V, 12-V, and 24-V Distributed Power Systems

封装：SOIC (D)