TI TPS2553DRVR

通用1不需要1.5A

Overview

The TPS255x and TPS255x-1power-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 (typical) through 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 turnon and turnoff.

TPS255xdevices limit the output current to a safe level by using a constant-current mode when the output load exceeds the current-limit threshold. TPS255x-1 devices provide circuit breaker functionality by latching off the power switch during overcurrent or reverse-voltage situations. 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.

Features

• Built-in Soft-Start

• Operating Range: 2.5 V to 6.5 V

• Up to 1.5 A Maximum Load Current

• Fast Overcurrent Response - 2-μs (typ)

• Backwards Compatible with TPS2550/51

• Reverse Input-Output Voltage Protection

• ±6% Current-Limit Accuracy at 1.7 A (typ)

• 85-m? High-Side MOSFET (DBV Package)

• Meets USB Current-Limiting Requirements

• Adjustable Current Limit, 75 mA–1300 mA (typ)

• UL Listed–File No. E169910 and NEMKO IEC60950-1-am1 ed2.0

• 15 kV ESD Protection per IEC 61000-4-2 (with External Capacitance)

• Constant-Current (TPS2552/53) and Latch-off (TPS2552-1/53-1) Versions

Applications

• Digital TV

• VOIP Phones

• Set-Top Boxes

• USB Ports/Hubs

• Auto-Retry Functionality

• Two-Level Current-Limit Circuit

• Typical Application as USB Power Switch

• Universal Serial Bus (USB) Power-Distribution Requirements