TPS54227DDAR开关稳压器4.5-18Vin原装TI

1 Features 3 Description

The TPS54227 device is an adaptive ON-time D1•

D-CAP2™ Mode Enables Fast Transient

CAP2 mode synchronous buck converter. The Response TPS54227 enables system designers to complete the

• Low Output Ripple and Allows Ceramic Output bus regulators for a suite of various end equipment

Capacitor with a cost-effective, low component count, low

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

the TPS54227 uses the D-CAP2 mode control which • Output Voltage Range: 0.76 V to 7 V

provides a fast transient response with no external

• Highly-Efficient Integrated FETs Optimized compensation components. The TPS54227 also has

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

– 155 mΩ (High-Side) and 108 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

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

TPS54227 is available in the 8-pin HSOP package

• 700-kHz Switching Frequency (fSW)

and 10-pin VSON, and is designed to operate from

• Cycle-By-Cycle Overcurrent Limit –40°C to 85°C.

TPS54227DDARTPS54227DDARTPS54227DDARTPS54227DDAR

1特征3描述

TPS54227设备是一种自适应准时D1•

D-CAP2™模式使快速瞬态

CAP2模式同步降压转换器。响应TPS54227使系统设计人员能够完成

•低输出纹波，允许陶瓷输出母线调节器为一套不同的终端设备

电容器具有性价比高，元器件数量少，成本低

•宽V备用电流解决方案。输入电压范围内的主控制回路:4.5 V ~ 18v

TPS54227采用D-CAP2模式控制，输出电压范围:0.76 V至7 V

提供没有外部响应的快速瞬态响应

•高效集成FETs优化补偿组件。TPS54227也有

对于低占空比应用，使设备能够采用的专用电路

155年- 155年mΩ(高端)和mΩ(下部)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。设备操作

•高初始带隙参考精度从4.5 v到18 v VIN输入。输出电压罐

•可调软启动程序在0.76 V到7 V之间。该设备

•预偏软启动还具有可调软启动时间。的

TPS54227在8针HSOP包中可用

•700-kHz开关频率(fSW)

和10针VSON，并设计从操作

•逐周期过载限制-40°C到85°C。