TPS2068E开发板套件编程器的评估演示板及套件规格书PDF中文资料

1 Features

• Single power switch family

• Pin-to-pin with existing TI Switch Portfolio

• Rated currents of 1.5 A and 2 A

• Supports 3.3-V and 5-V power rail

• ±20 accurate, fixed, constant current limit

• Fast overcurrent response: 2 μs

• Deglitched fault reporting

• Output discharge

• Reverse current blocking

• Built-in soft start

• Ambient temperature range: –40°C to 85°C

2 Applications

• USB ports and hubs, laptops, and desktops

• High-definition digital TVs

• Set-top boxes

• Short-circuit protection

3 Description

The TPS20xxE power-distribution switch family is

intended for applications, such as USB, where heavy

capacitive loads and short circuits are likely to be

encountered. This family offers multiple devices with

fixed current-limit thresholds for applications from 1.5

A to 2 A.

The TPS20xxE family limits the output current to a

safe level by operating in a constant-current mode

when the output load exceeds the current limit

threshold. This provides a predictable fault current

under all conditions. The fast overload response

time eases the burden on the 3.3-V–5.5-V supply to

provide regulated power when the output is shorted.

The power-switch rise and fall times are controlled to

minimize current surges during turnon and turnoff.