TPS54332DDAR开关稳压器DC/DC原装TI

1特征3描述

TPS54332是一个28-V, 3.5-A非同步1•3.5-V到28-V的输入电压范围

汇聚了低rds (on)高端的buck转换器

输出电压可调至0.8 V MOSFET。为了提高轻负载时的效率

•集成80 - mΩ高端MOSFET支持pulse-skipping经济型特性是自动

可激活3.5-A连续输出电流。此外,1-μA关闭供应

电流允许该设备用于电池-•高效率轻负载与脉冲电源

应用程序。电流模式控制跳过经济型™内部斜率补偿简化了外部

固定1-MHz开关频率补偿计算和减少组件

•典型1-μA关闭静态电流计算,同时允许使用陶瓷的输出

•可调慢启动限制涌流电容。一个电阻分压器程序的滞后

输入欠压锁定。一个过电压

可编程UVLO阈值瞬态保护电路限制电压过冲

•启动和瞬态条件下的过电压瞬态保护。一个周期•

循环逐周期电流限制，频率折回电流限制方案，频率折回和

热停堆保护热停堆保护装置和负载

过载条件的事件。TPS54332是

•在热增强有SOIC可用在一个有SOIC PowerPAD™包。

消费者应用程序，如机顶盒，

CPE设备，液晶显示器，外设，和

电池充电器

•工业和汽车音频电源

•5-V、12-V和24-V分布式电源系统

1 Features 3 Description

The TPS54332 is a 28-V, 3.5-A non-synchronous 1• 3.5-V to 28-V Input Voltage Range

buck converter that integrates a low-RDS(on) high-side

• Adjustable Output Voltage Down to 0.8 V MOSFET. To increase efficiency at light loads, a

• Integrated 80-mΩ High-Side MOSFET Supports pulse-skipping Eco-Mode feature is automatically

up to 3.5-A Continuous Output Current activated. Furthermore, the 1-μA shutdown supply

current allows the device to be used in battery- • High Efficiency at Light Loads With a Pulsepowered

applications. Current mode control with Skipping Eco-Mode™ internal slope compensation simplifies the external

• Fixed 1-MHz Switching Frequency compensation calculations and reduces component

• Typical 1-μA Shutdown Quiescent Current count while allowing the use of ceramic output

• Adjustable Slow-Start Limits Inrush Currents capacitors. A resistor divider programs the hysteresis

of the input undervoltage lockout. An overvoltage

• Programmable UVLO Threshold transient protection circuit limits voltage overshoots

• Overvoltage Transient Protection during start-up and transient conditions. A cycle-by•

Cycle-by-Cycle Current Limit, Frequency Foldback cycle current limit scheme, frequency foldback and

and Thermal Shutdown Protection thermal shutdown protect the device and the load in

the event of an overload condition. The TPS54332 is

• Available in Thermally Enhanced 8-Pin SOIC available in an 8-pin SOIC PowerPAD™ package.

Consumer Applications such as Set-Top Boxes,

CPE Equipment, LCD Displays, Peripherals, and

Battery Chargers

• Industrial and Car Audio Power Supplies

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

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