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1 Features

1? Up to 1.5 A Maximum Load Current

? ±6% Current-Limit Accuracy at 1.7 A (Typ)

? Meets USB Current-Limiting Requirements

? Backwards Compatible with TPS2550/51

? Adjustable Current Limit, 75 mA–1700 mA (Typ)

? Constant-Current (TPS2552D and TPS2553D)

? TPS2552D (Enable Low) and TPS2553D (Enable

High)

? Fast Overcurrent Response - 2 μs (Typ)

? 85-mΩ High-Side MOSFET (DBV Package)

? Reverse Input-Output Voltage Protection

? Operating Range: 2.7 V to 6.5 V

? Built-in Soft-Start

? 15 kV ESD Protection per IEC 61000-4-2 (With

External Capacitance)

? UL Listed – File No. E169910 and NEMKO

IEC60950-1-am1 ed2.0

? See the TI Switch Portfolio

2 Applications

? USB Ports/Hubs

? Digital TV

? Set-Top Boxes

? VOIP Phones

3 Description

The TPS2552D and TPS2553D power-distribution

switches are intended for applications where

precision current limiting is required or heavy

capacitive loads and short circuits are encountered

and provide up to 1.5 A of continuous load current.

These devices offer a programmable current-limit

threshold between 75 mA and 1.7 A (typ) via an

external resistor. Current-limit accuracy as tight as

±6% can be achieved at the higher current-limit

settings. The power-switch rise and fall times are

controlled to minimize current surges during turn

on/off.

The TPS2552D/3D devices limit the output current to

a safe level by using a constant-current mode when

the output load exceeds the current-limit threshold.

An internal reverse-voltage comparator disables the

power-switch when the output voltage is driven higher

than the input to protect devices on the input side of

the switch. The FAULT output asserts low during

overcurrent and reverse-voltage conditions.