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) 5.3 Overcurrent response Current limiting Fault response Auto Retry, Latch Off UL recognition
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) 5.3 Overcurrent response Current limiting Fault response Auto Retry, Latch Off UL recognition
WQFN (RVC) 20 12 mm² 3 x 4
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C5
  • 2.7-V to 18-V operating voltage, 20 V (maximum)
  • Total RON: 42 mΩ (typical)
  • 0.6-A to 5.3-A adjustable current limit (±8%)
  • IMON Current indicator output
    • ±8% accuracy for TPS25940-Q1/TPS25940L-Q1
  • Adjustable under-, overvoltage threshold (±2%)
  • Reverse current blocking
  • 1-µs reverse voltage shutoff
  • Programmable dVo/dt control
  • Power good and fault outputs
  • Short-to-battery protection
  • Short-to-ground protection
  • TPS25940-Q1/TPS259401A-Q1: auto-retry
  • TPS25940L-Q1: latch-off
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C5
  • 2.7-V to 18-V operating voltage, 20 V (maximum)
  • Total RON: 42 mΩ (typical)
  • 0.6-A to 5.3-A adjustable current limit (±8%)
  • IMON Current indicator output
    • ±8% accuracy for TPS25940-Q1/TPS25940L-Q1
  • Adjustable under-, overvoltage threshold (±2%)
  • Reverse current blocking
  • 1-µs reverse voltage shutoff
  • Programmable dVo/dt control
  • Power good and fault outputs
  • Short-to-battery protection
  • Short-to-ground protection
  • TPS25940-Q1/TPS259401A-Q1: auto-retry
  • TPS25940L-Q1: latch-off

The TPS25940xx-Q1 eFuse Power Switches are compact, feature rich power management devices 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 systems with load side holdup energy that must not drain back to a failed supply bus.

Load, source and device protection are provided with many programmable features including overcurrent, dVo/dt ramp and overvoltage, undervoltage thresholds. For system status monitoring and downstream load control, the device provides PGOOD, FLT and precise current monitor output. Precise programmable undervoltage, overvoltage thresholds and mode simplify power management design.

The TPS25940xx-Q1 monitor V(IN) and V(OUT) to provide true reverse current blocking when V(IN) < (V(OUT) – 66 mV). This function supports supply bus protection from over-voltages during output short to battery faults.

The TPS25940xx-Q1 eFuse Power Switches are compact, feature rich power management devices 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 systems with load side holdup energy that must not drain back to a failed supply bus.

Load, source and device protection are provided with many programmable features including overcurrent, dVo/dt ramp and overvoltage, undervoltage thresholds. For system status monitoring and downstream load control, the device provides PGOOD, FLT and precise current monitor output. Precise programmable undervoltage, overvoltage thresholds and mode simplify power management design.

The TPS25940xx-Q1 monitor V(IN) and V(OUT) to provide true reverse current blocking when V(IN) < (V(OUT) – 66 mV). This function supports supply bus protection from over-voltages during output short to battery faults.

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Technical documentation

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Type Title Date
* Data sheet TPS25940xx-Q1 2.7-V to 18-V eFuse with Integrated Short-to-Battery Protection datasheet (Rev. E) 29 Jan 2021
Application note eFuse: Safety Certification and why it Matters 18 Mar 2020
E-book 11 Ways to Protect Your Power Path white paper 03 Jul 2019
User guide TPS25940 Evaluation Module User's Guide (Rev. B) 09 Jul 2018
Application note Basics of eFuses (Rev. A) 05 Apr 2018
Application note Charging Super Capacitor With eFuse 08 Aug 2017
Application note Power Multiplexing Using Load Switches and eFuses (Rev. A) 20 Jun 2017

Design & development

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

Evaluation board

TPS25940EVM-635 — TPS25940x Evaluation Module

The TPS25940XEVM-635 is an eFuse (Current Limiter with DEVSLP) 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 (...)

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Simulation model

TPS25940-Q1 Unencrypted PSpice Transient Model Package (Rev. B)

SLVMBN6B.ZIP (78 KB) - PSpice Model
Simulation model

TPS25940L-Q1 PSpice Transient Model

SLVMCQ3.ZIP (84 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Calculation tool

TPS2594x Design Calculation Tool

SLVC571.ZIP (190 KB)
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The TIDA-01514 reference design provides protection and diagnostics for antenna modules for use in automotive infotainment and navigation systems. This design is an alternate solution for antenna low-dropout linear regulators (LDOs) for the purpose of achieving lower ohmic drop (IR) while meeting (...)
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PMP30046 — Enterprise SSD Backup Power Reference Design

The PMP30046 reference design shows a system solution for an enterprise SSD backup power supply. The input voltage of the hotswap controller can be either 5V or 12V. A buck stage converts this input voltage to 3.3V with a maximum load current of 2.5A. The 3.3V are boosted to 28V for charging a (...)
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WQFN (RVC) 20 View options

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