TI TPS22967单通道4A负载开关参考设计方案

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TI公司的TPS22967是一款小型超
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的单通道负载可控制转换

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，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

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控制信号控制开关。当开关关断时，在TPS22967内部有一个225Ω的

，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

的设计原理图、元器件列表及PCB元件布局图。
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1 w: f; \" b" U, ]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.

* O( U* E( Y! L! j' v1 [TPS22967主要特性：

$ N, M  {7 L6 m$ v; a9 VIntegrated Single Channel Load Switch
3 w% u5 w" s9 e9 S6 `* h* qInput Voltage Range: 0.8V to 5.5V
; ?" W: h6 _/ d5 b# H) ^Ultra low RON Resistance
RON = 22mΩ at VIN = 5V (VBIAS = 5V)
RON = 22mΩ at VIN = 3.6V (VBIAS = 5V)
RON = 22mΩ at VIN = 1.8V (VBIAS = 5V)
0 B" A$ L* p3 D  h5 v4A Maximum Continuous Switch Current
Low Quiescent Current (50µA)
Low Control Input Threshold Enables Use of 1.2V/1.8V/2.5V/3.3V Logic
Configurable Rise Time
Quick Output Discharge (QOD)
( m8 u' O2 N" u4 \& l0 ]SON 8-pin Package With Thermal Pad
ESD Performance Tested per JESD 22
2KV HBM and 1KV CDM

TPS22967应用：

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Tablet PC
Consumer Electronics
Set-top Boxes/Residental Gateways
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Telecom SystemSolid State Drives (SSD)

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TPS22967方案介绍：

The TPS22967EVM-023 evaluation module contains a single channel, ultra low ON resistance, 4-A load switch with controlled turn-on and adjustable rise time。
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% h0 @( H/ y' [$ N" K' s! ETPS22967方案原理图：

3 Y  O4 G: G& W) Y5 D图2. TPS22967方案原理图
+ ]! y" I& `8 K9 G, l* J0 mTPS22967方案材料清单：

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slvsc42.pdf

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slvu951.pdf

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sdsdwwwe22

TPS22967是一款小型，超低RON，单通道负载开关，具有受控导通。