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

的单通道负载可控制转换

，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

控制信号控制开关。当开关关断时，在TPS22967内部有一个225Ω的

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，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。

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.
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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.
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( Y1 J/ N' j4 M) W( u) |$ xTPS22967主要特性：
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Integrated Single Channel Load Switch
+ \8 c! I7 ^% j6 KInput Voltage Range: 0.8V to 5.5V
3 s" \6 \. Z' K" vUltra low RON Resistance
RON = 22mΩ at VIN = 5V (VBIAS = 5V)
2 ?1 M6 B. g  @. e9 dRON = 22mΩ at VIN = 3.6V (VBIAS = 5V)
RON = 22mΩ at VIN = 1.8V (VBIAS = 5V)
& Q6 c" F7 ]: y: z5 i4A Maximum Continuous Switch Current
5 C# Y: {. G2 p0 b$ w; _( |" VLow Quiescent Current (50µA)
; n0 z# z; ?. R- d3 A! _Low Control Input Threshold Enables Use of 1.2V/1.8V/2.5V/3.3V Logic
' L# b5 c' Z# J+ x. Q' sConfigurable Rise Time
2 X1 Y& U  p5 [+ p, mQuick Output Discharge (QOD)
SON 8-pin Package With Thermal Pad
& E' V% c9 [2 b& b. l! C. w& P2 yESD Performance Tested per JESD 22
2KV HBM and 1KV CDM

8 T( g; I6 K" nTPS22967应用：

Ultrabook
Notebooks/Netbooks
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Consumer Electronics
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Telecom SystemSolid State Drives (SSD)

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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图2. TPS22967方案原理图
  V# B9 K! V! j& w! u' M% ZTPS22967方案材料清单：
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PCB元件布局图：
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slvu951.pdf

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TPS22967是一款小型，超低RON，单通道负载开关，具有受控导通。