TPS54527DDAR开关稳压器4.5-18VIN原装TI

1 Features

1• D-CAP2™ Mode Enables Fast Transient

Response

• Low Output Ripple and Allows Ceramic Output

Capacitor

• Wide Input Voltage Range: 4.5 V to 18 V

• Output Voltage Range: 0.76 V to 6 V

• Highly Efficient Integrated FETs Optimized for

Lower Duty Cycle Applications: 65 mΩ (High Side)

and 36 mΩ (Low Side)

• High Efficiency: Less Than 10 μA at Shutdown

• High Initial Bandgap Reference Accuracy

• Adjustable Soft Start

• Prebiased Soft Start

• 650-kHz Switching Frequency

• Cycle-by-Cycle Overcurrent Limit

2 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)

3 Description

The TPS54527 is an adaptive on-time D-CAP2 mode

synchronous buck converter. The TPS54527 enables

system designers to complete the suite of various

end equipment’s power bus regulators with a cost

effective, low component count, low standby current

solution. The main control loop for the TPS54527

uses the D-CAP2 mode control which provides a fast

transient response with no external compensation

components. The TPS54527 also has a proprietary

circuit that enables the device to adopt to both low

equivalent series resistance (ESR) output capacitors,

such as POSCAP or SP-CAP, and ultra-low ESR

ceramic capacitors. The device operates from a 4.5-V

to 18-V input. The output voltage can be programmed

from 0.76 V to 6 V. The device also features an

adjustable soft-start time.
TPS54527DDARTPS54527DDARTPS54527DDARTPS54527DDAR

1功能

1•D-CAP2™模式使快速瞬态

响应

•低输出纹波，陶瓷输出

电容器

•宽输入电压范围:4.5 V至18v

输出电压范围:0.76 V ~ 6v

•高效集成FETs优化

低占空比应用程序:65 mΩ(高压侧)

和36 mΩ(偏低)

•效率高:不到10μA关闭

•高初始带隙参考精度

•可调软启动

•有偏见的软启动

•650千赫开关频率

•逐周期过电流限制

2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)

3描述

TPS54527是一种自适应准时D-CAP2模式

同步降压转换器。TPS54527使

系统设计人员完成各种套件

终端设备的电源母线调压器有一定的成本

有效，低元件计数，低待机电流

解决方案。TPS54527的主控制循环

使用D-CAP2模式控制，提供快速

无外部补偿的瞬态响应

组件。TPS54527也有一个专利

使装置能同时采用两种低电压的电路

等效串联电阻(ESR)输出电容器，

例如POSCAP或SP-CAP和超低ESR

陶瓷电容器。该设备从4.5 v运行

18-V输入。输出电压可以编程

从0.76 V到6v。该设备还具有一个

可调软启动时间。TPS54527是可用的

在8针DDA包装，并设计操作

从-40°C到85°C。