Product details


FET Internal Ron (Typ) (mOhm) 42 Vin (Min) (V) 2.7 Vin (Max) (V) 18 Vabsmax_cont (V) 20 Current limit (Min) (A) 0.6 Current limit (Max) (A) 5.2 Overcurrent response Current limiting Fault response Auto Retry UL recognition UL2367, UL60950 open-in-new Find other eFuses & hot swap controllers

Package | Pins | Size

WQFN (RVC) 20 12 mm² 3 x 4 open-in-new Find other eFuses & hot swap controllers


  • 2.7 V to 18 V Operating Voltage, 20 V (Maximum)
  • 42-mΩ RON (Typical)
  • 0.6 A to 5.3 A Adjustable Current Limit (±8%)
  • IMON Current Indicator Output (±8%)
  • 200-µA Operating IQ (Typical)
  • 15-µA Disabled IQ (Typical)
  • ±2% Overvoltage, Undervoltage Thresholds
  • Reverse Current Blocking
  • 1-µs Reverse Voltage Shutoff
  • Programmable dVo/dt Control
  • Power Good and Fault Outputs
  • Two Overcurrent Fault Response Options
    • TPS25942: I(LIMIT) with Thermal Shutdown
    • TPS25944: 4 ms Fault Timer then Shutoff
  • –40°C to +125°C Junction Temperature Range
  • UL 2367 Recognized
    • File No. 169910
    • RILIM ≥ 20 kΩ (4.81 A Maximum)
  • UL60950 Safe during Single Point Failure
    • Open-Short ILIM detection
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The TPS25942, TPS25944 eFuse Power MUX is a compact, feature rich power management device with a full suite of protection functions. The wide operating range allows control of many popular DC bus voltages. Integrated back-to-back FETs provide bidirectional current control making the device well suited for power muxing and systems with multiple power sources.

Load, source and device protection are provided with many programmable features. Thresholds for undervoltage, overvoltage, overcurrent, dVo/dt ramp rate, power good, and in-rush current protection are all programmable to suit specific system requirements. For system status monitoring and downstream load control, the device provides PGOOD, FLT and precise current monitor output.

The TPS25942, TPS25944 monitor V(IN) and V(OUT) to provide true reverse blocking from output when V(IN) < (V(OUT) – 10 mV). The device can be configured to assign Main/Auxiliary supply priority using the FLT and DMODE pins.

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NEW TPS25947 ACTIVE 2.7-V to 23-V, 28-mΩ, 5.5-A eFuse with integrated reverse polarity protection Improved performance and pricing in a smaller package

Technical documentation

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Type Title Date
* Data sheet TPS25942x/44x 2.7 V-18 V, 5-A eFuse Power MUX With Multiple Protection Modes datasheet (Rev. D) Nov. 01, 2017
Certificate TPS25942/44 CB Test Certificate IEC 62368-1 Jul. 09, 2021
Certificate TPS2594x UL Certificate of Compliance UL 2367 Apr. 10, 2020
Application note eFuse: Safety Certification and why it Matters Mar. 18, 2020
E-book 11 Ways to Protect Your Power Path white paper Jul. 03, 2019
Application note Backplane Power Protection in PLC Systems Jun. 11, 2019
Application note Accurate Thermal Calculations on the Back of a Napkin Jun. 03, 2019
Application note Basics of Power Switches (Rev. A) Apr. 26, 2019
Application note Basics of eFuses (Rev. A) Apr. 05, 2018
Technical article eFuses: clamping and cutoff and auto retry, oh my! – part 3/3 Jun. 02, 2016
User guide TPS25942x635EVM: Evaluation Module For TPS25942x User's Guide May 27, 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The TPS25942XEVM-635 is an eFuse (Current Limiter with ENBLKb) that operates from 2.7V to 18V, and have integrated back-to-back FETs with programmable under-voltage, over-voltage, reverse-voltage, over-current and in-rush current protection. It also includes analog current monitoring in a small (...)

  • 2.7V to 18V operating voltage range
  • Up to 5A adjustable ILIMIT setting option using Jumpers
  • On board fault and power good LED’s
  • Linear output ramp (gate dV/dt control) option
  • On board test point access for all device level pins

Design tools & simulation

SLVMAA3D.ZIP (144 KB) - PSpice Model
SLVMB42B.TSC (181 KB) - TINA-TI Reference Design
SLVMB43A.ZIP (38 KB) - TINA-TI Spice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SLVC571.ZIP (190 KB)

CAD/CAE symbols

Package Pins Download
WQFN (RVC) 20 View options

Ordering & quality

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  • MSL rating/Peak reflow
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  • Qualification summary
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