TI TPS22967单通道4A负载开关参考设计方案

TI公司的TPS22967是一款小型超低导通电阻的单通道负载可控制转换开关器件，内建N沟道MOSFET都场效应管，输入电压范围为：0.8V至5.5V，最大持续电流为4A。该芯片可以通过一个低电压控制信号控制开关。当开关关断时，在TPS22967内部有一个225Ω的下拉电阻，可以快速地对输出端进行放电。本文首先介绍芯片的简介、特性、内部框图及应用领域，并给出相应设计方案的设计原理图、元器件列表及PCB元件布局图。

The TPS22967 is a small, ultra-low RON, single channel load switch with controlled turn on. The device contains an N-channel MOSFET that can operate over an input voltage range of 0.8V to 5.5V and can support a maximum continuous current of 4A. The switch is controlled by an on/off input (ON), which is capable of interfacing directly with low-voltage control signals. In the TPS22967, a 225-Ω pull-down resistor is added for quick output discharge when switch is turned off.

The TPS22967 is available in a small, space-saving 2mm x 2mm 8-pin SON package (DSG) with integrated thermal pad allowing for high power dissipation. The device is characterized for operation over the free-air temperature range of –40°C to 85°C.

TPS22967主要特性：

Integrated Single Channel Load Switch
Input Voltage Range: 0.8V to 5.5V
Ultra low RON Resistance
RON = 22mΩ at VIN = 5V (VBIAS = 5V)..

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