TPS54331-Q1中文资料具有 Eco-Mode™ 的汽车类 3.5V 至 28V、570kHz 固定频率 3A 降压转换器数据手册TI规格书

描述 Description

The TPS54331 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 divider programs the hysteresis of the input under-voltage lockout. An overvoltage transient protection circuit limits voltage overshoots during startup and transient conditions. A cycle by cycle current limit scheme, frequency fold back and thermal shutdown protect the device and the load in the event of an overload condition. The TPS54331 is available in an 8-pin SOIC package that has been internally optimized to improve thermal performance.

特性 Features

• Qualified for Automotive Applications
• Adjustable Output Voltage Down to 0.8V
• High Efficiency at Light Loads with Pulse Skipping Eco-mode™ Control
• Typical 1µA Shutdown Quiescent Current
• Programmable UVLO Threshold
• Cycle-by-Cycle Current Limit, Frequency Fold Back and Thermal Shutdown Protection
• Supported by SwitcherPro™ Software Tool (http://focus.ti.com/docs/toolsw/folders/print/switcherpro.html)
• APPLICATIONS
• Industrial and Car Audio Power Supplies
• 5-V, 12-V and 24-V Distributed Power Systems

SWIFT, Eco-mode, SwitcherPro, PowerPAD are trademarks of Texas Instruments.