1 Features

1• Meets USB Current-Limiting Requirements

• Adjustable Current Limit, 500 mA to 5 A (Typical)

• ±6.5% Current-Limit Accuracy at 4.5 A

• Fast Overcurrent Response: 3.5-μs (Typical)

• 22-mΩ High-Side MOSFET

• Operating Voltage: 2.5 V to 6.5 V

• 2-μA Maximum Standby Supply Current

• Built-in Soft Start

• 15-kV and 8-kV System-Level ESD Capable

• UL Listed: File No. E169910 and CB IEC60950-1-

am2 ed2.0

2 Applications

• USB Ports and Hubs

• Digital TVs

• Set-Top Boxes

• VOIP Phones

3 Description

The TPS255x power-distribution switch is intended

for applications where precision current limiting is

required or heavy capacitive loads and short circuits

are encountered. These devices offer a

programmable current-limit threshold between

500 mA and 5 A (typical) through an external resistor.

The power-switch rise and fall times are controlled to

minimize current surges during turnon and turnoff.

TPS255x devices limit the output current to a safe

level by switching into a constant-current mode when

the output load exceeds the current-limit threshold.

The FAULT logic output asserts low during

overcurrent and overtemperature conditions.