TPS2052CDGN中文资料德州仪器数据手册PDF规格书

1 Features

1• Dual Power Switch Family

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

• Accurate ±20% Current Limit Tolerance

• Fast Overcurrent Response – 2 μs (Typical)

• 70-mΩ (Typical) High-Side N-Channel MOSFET

• Operating Range: 4.5 V to 5.5 V

• Deglitched Fault Reporting (FLTx)

• Selected Parts With (TPS20xxC) and Without

(TPS20xxC-2) Output Discharge

• Reverse Current Blocking

• Built-in Softstart

• Pin for Pin With Existing TI Switch Portfolio

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

2 Applications

• USB Ports or Hubs, Laptops, Desktops

• High-Definition Digital TVs

• Set Top Boxes

• Short Circuit Protection

3 Description

The TPS20xxC and TPS20xxC-2 dual power-

distribution switch family is intended for applications such as USB where heavy capacitive loads and

short-circuits may be encountered. This family offers

multiple devices with fixed current-limit thresholds for

applications between 0.5 A and 2 A.

The TPS20xxC and TPS20xxC-2 dual 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 overcurrent

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.