Product
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TPS2557
  • TPS2557
  • TPS2557

TPS2557

ACTIVE

0.5-5A adjustable ILIMIT, 2.5-6.5V, 22mΩ USB power switch, active-high

Texas Instruments TPS2557 Product Info

1 April 2026 2

Parameters

Product type

Adjustable current limit, Power switch

Rating

Catalog

Continuous current (max) (A)

5

Current limit (A)

0.5 to 5.0

Number of switches

1

Enable

Active High

Vin (max) (V)

6.5

Vin (min) (V)

2.5

Operating temperature range (°C)

-40 to 125

Current limit accuracy at 1 A

7.0% (4100mA min / 4715mA max)

Package

VSON (DRB)-8-9 mm² 3 x 3

Features

  • 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
  • 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

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.

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