深圳市中立信电子科技有限公司

1 Features 3 Description

The TPS51117 device is a cost-effective,

1• High Efficiency, Low Power Consumption, 4.5-μA

synchronous buck controller for POL voltage Typical Shutdown Current regulation in notebook PC applications. The controller

• Fixed Frequency Emulated On-Time Control, is dedicated for the operation of the Adaptive OnAdjustable

from 100 kHz to 550 kHz Time D-CAP mode. This mode provides ease-of-use,

• D-CAP™ Mode With 100-ns Load Step Response low external component count, and fast transient

response. Auto-skip mode for high efficiency down to • < 1% Initial Reference Accuracy

the milliampere load range, or PWM-only mode for

• Output Voltage Range: 0.75 V to 5.5 V low-noise operation is selectable.

• Wide Input Voltage Range: 1.8 V to 28 V

The current-sensing scheme for positive overcurrent

• Selectable Auto-Skip/PWM-Only Operation and negative overcurrent protection is loss-less low•

Temperature Compensated (4500 ppm/°C) side RDS(on) sensing plus temperature compensation.

Low-Side RDS(on) Overcurrent Sensing The device receives a 5-V (4.5 V to

5.5 V) supply from another regulator such as the • Negative Overcurrent Limit

TPS51120 or TPS51020. The conversion input can

• Integrated Boost Diode be either VBAT or a 5-V rail, ranging from 1.8 V to

• Integrated OVP/UVP and Thermal Shutdown 28 V, and the output voltage range is from 0.75 V to

5.5 V. • Powergood Signal

• Internal 1.2-ms Voltage Soft-Start The TPS51117 is available in a 14-pin VQFN or a 14-

pin TSSOP package and is specified from –40°C to • Integrated Output Discharge (Soft-Stop)

85°C.
TPS51117PWTPS51117PWTPS51117PWTPS51117PW

1特征3描述

TPS51117是一款性价比高的设备，

1•效率高,低功耗,4.5 -μa

在笔记本电脑应用中，同步buck控制器用于POL电压典型的关机电流调节。控制器

•固定频率实时仿真控制，专用于自适应OnAdjustable操作

从100千赫到550千赫时间D-CAP模式。这种模式提供了易用性，

•D-CAP™模式与100 - ns负载阶跃响应外部组件计数低,和快速瞬态

响应。自动跳跃模式，高效率下降到•< 1%的初始参考精度

用于毫安负载范围，或PWM-only模式

输出电压范围:0.75 V ~ 5.5 V低噪声操作可选。

•宽输入电压范围:1.8 V至28 V

正过电流电流传感方案

•可选择的自动跳跃/ pwm操作和负过流保护低损耗

温度补偿(4500 ppm /°C)一边RDS(上)传感+温度补偿。

低侧RDS(on)过流传感装置接收5-V (4.5 V to)

5.5 V)来自另一个调节器的供应，如•负过流限制

TPS51120或TPS51020。转换输入可以

•集成升压二极管要么是VBAT要么是5-V导轨，从1.8 V到1.8 V不等

•集成OVP/UVP和热停机28v，输出电压范围为0.75 V ~

5.5 V.•Powergood信号

•内部1.2 ms电压软启动TPS51117可在14引脚VQFN或14-

销TSSOP包和指定从-40°C•综合输出放电(Soft-Stop)

85°C。