TPS2051CDBVR.B中文资料德州仪器数据手册PDF规格书

1 Features

1• Single Power Switch Family

• Pin-for-Pin With Existing TI Switch Portfolio

• Rated Currents of 0.5 A, 1 A, 1.5 A, 2 A

• ±20% Accurate, Fixed, Constant Current Limit

• Fast Overcurrent Response: 2 μs

• Deglitched Fault Reporting

• Selected Parts With (TPS20xxC) and Without

(TPS20xxC-2) Output Discharge

• Reverse Current Blocking

• Built-In Soft Start

• Ambient Temperature Range: –40°C to 85°C

• UL Listed and CB-File No. E169910

2 Applications

• USB Ports and Hubs, Laptops, and Desktops

• High-Definition Digital TVs

• Set-Top Boxes

• Short-Circuit Protection

3 Description

The TPS20xxC and TPS20xxC-2 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 0.5 A to 2 A.

The TPS20xxC and TPS20xxC-2 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 main 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.