TPS54229DDAR开关稳压器4.5-18Vin原装TI

1FEATURES DESCRIPTION

23• D-CAP2™ Mode Enables Fast Transient The TPS54229 is an adaptive on-time D-CAP2™

mode synchronous buck converter. TheTPS54229 Response enables system designers to complete the suite of • Low Output Ripple and Allows Ceramic Output various end equipment’s power bus regulators with a

Capacitor cost effective, low component count, low standby

• Wide VIN Input Voltage Range: 4.5 V to 18 V current solution. The main control loop for the

TPS54229 uses the D-CAP2™ mode control which • Output Voltage Range: 0.76 V to 7.0 V provides a fast transient response with no external

• Highly Efficient Integrated FETs Optimized compensation components. The TPS54229 also has

for Lower Duty Cycle Applications a proprietary circuit that enables the device to adopt

– 160 mΩ (High Side) and 110 mΩ (Low Side) to both low equivalent series resistance (ESR) output

capacitors, such as POSCAP or SP-CAP, and ultra- • High Efficiency, Less Than 10 μA at Shutdown

low ESR ceramic capacitors. The device operates • High Initial Bandgap Reference Accuracy from 4.5-V to 18-V VIN input. The output voltage can

• Adjustable Soft Start be programmed between 0.76 V and 7 V. The device

• Pre-Biased Soft Start also features an adjustable soft start time. The

TPS54229 is available in the 8-pin DDA package, • 650-kHz Switching Frequency (fSW)

and designed to operate from –40°C to 85°C.

• Cycle By Cycle Over Current Limit

APPLICATIONS

• Wide Range of Applications for Low Voltage

System

– Digital TV Power Supply

– High Definition Blu-ray Disc™ Players

– Networking Home Terminal

– Digital Set Top Box (STB)
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1功能描述

23•D-CAP2™模式使快速瞬态TPS54229是一个自适应准时D-CAP2™

模式同步降压转换器。TheTPS54229响应使系统设计人员能够完成一套•低输出纹波和陶瓷输出各种终端设备的电源母线调节器与a

电容器成本有效，元件计数低，待机率低

•宽VIN输入电压范围:4.5 V至18v电流解决方案。的主控制循环

TPS54229使用D-CAP2™模式控制•输出电压范围:0.76 V至7.0 V没有外部提供了一个快速的瞬态响应

•高效集成FETs优化补偿组件。TPS54229也有

对于低占空比应用，使设备能够采用的专用电路

- 160 mΩ(高压侧)和110 mΩ(偏低)都低等效串联电阻(ESR)输出

电容器,如POSCAP或SP-CAP和超效率高,不到10μA关闭

低ESR陶瓷电容器。该设备运行•高初始带隙参考精度从4.5 v到18 v VIN输入。输出电压罐

可调软启动程序设定在0.76 V到7v之间。该设备

•预偏软启动还具有可调软启动时间。的

TPS54229可在8引脚DDA包中使用，•650 khz开关频率(fSW)

操作和设计从-40°C到85°C。

•一个循环一个循环，超过当前极限

应用程序

•适用于低电压的广泛应用

系统

-数字电视电源

-高清蓝光光盘™的球员

-联网家庭终端

-数码机顶盒(STB)