Product details


Vin (Min) (V) 2.5 Vin (Max) (V) 6.5 Continuous current (Max) (A) 5 Current limit (A) 0.5 to 5.0 Product type Power switch Operating temperature range (C) -40 to 85 Enable Active High Number of switches 1 Rating Catalog open-in-new Find other USB power switches & charging port controllers

Package | Pins | Size

VSON (DRB) 8 9 mm² 3 x 3 open-in-new Find other USB power switches & charging port controllers


  • 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
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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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Technical documentation

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Type Title Date
* Data sheet TPS255x Precision Adjustable Current-Limited Power-Distribution Switches datasheet (Rev. B) Dec. 01, 2016
Technical article What’s not in the power MOSFET data sheet part 2: voltage-dependent leakage currents Jul. 23, 2021
Certificate TPS2557 UL Certificate of Compliance IEC 62368-1 Sep. 07, 2020
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
User guide Using the TPS2556/7EVM Nov. 19, 2009

Design & development

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Hardware development

document-generic User guide

The TPS2556EVM-423 and TPS2557EVM-423 are evaluation modules (EVM) for Texas Instruments power-distribution switches with adjustable current-limit. These EVMs operate over a 2.5-V to 6.5-V range. An on-board jumper sets the output current-limit to either 0.5 A or 1 A. The board is designed for the (...)

Design tools & simulation

SLVM409A.ZIP (31 KB) - PSpice Model
SLVM494.TSC (635 KB) - TINA-TI Reference Design
SLVM495.ZIP (22 KB) - TINA-TI Spice Model

CAD/CAE symbols

Package Pins Download
SON (DRB) 8 View options

Ordering & quality

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Support & training

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