Product details


FET Internal Ron (Typ) (mOhm) 90 Vin (Min) (V) 4.5 Vin (Max) (V) 18 Vabsmax_cont (V) 20 Current limit (Min) (A) 0.4 Current limit (Max) (A) 1.6 Overcurrent response Current limiting, Circuit breaker Fault response Auto Retry UL recognition UL2367, UL60950 open-in-new Find other eFuses & hot swap controllers

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 open-in-new Find other eFuses & hot swap controllers


  • 4.5 V – 18 V Operating Voltage, 20 V (Max)
  • 90 mΩ RDS(ON) (Typical)
  • 0.4 A to 1.6 A Adjustable Current Limit
  • ±2% Accurate ILIMIT at 1A at 25°C
  • ±3% Overvoltage, Undervoltage Threshold
  • Programmable dVO/dt Control
  • Fault Output for Thermal Shutdown, UVLO and
  • –40°C to 125°C Junction Temperature Range
  • Auto-Retry and Latch-Off Versions
  • UL2367 Recognized - File No. E169910
  • UL60950 - Safe during Single Point Failure Test
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The TPS25921 is a compact, feature rich eFuse with a full suite of protection functions. The wide operating voltage allows control of many popular DC buses. The precise ±2% current limit, at room temperature, provides excellent accuracy making the TPS25921 well suited for many system protection applications.

Load, source and device protection are provided with multiple programmable features including overcurrent, overvoltage and undervoltage. 3% threshold accuracy for UV and OV, ensures tight supervision of bus voltages, eliminating the need for supervisor circuitry. Fault flag output (FLT) is provided for system status monitoring and down stream load control.

For hot-plug-in boards, TPS25921 provides in-rush current control and programmable output ramp-rate. Output ramp rate is programmable using a capacitor at soft-start (SS) pin, for maximum design flexibility.

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TPS2596 ACTIVE 2.7-V to 19-V, 85mΩ, 0.13-2A eFuse with selectable over voltage protection clamp in leaded package This product is an EFT tolerant eFuse with high accuracy at very low current limit settings.

Technical documentation

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Type Title Date
* Data sheet TPS25921x 4.5V - 18V eFuse with Precise Current Limit and Over Voltage Protection datasheet (Rev. C) Nov. 11, 2015
Certificate TPS25921 CB Test Certificate IEC 62368-1 Jul. 09, 2021
Application note eFuse: Safety Certification and why it Matters Mar. 18, 2020
Certificate TPS25921x UL Certificate of Compliance IEC 62368-1 Jan. 17, 2020
E-book 11 Ways to Protect Your Power Path white paper Jul. 03, 2019
Application note Basics of eFuses (Rev. A) Apr. 05, 2018
Technical article How adding an eFuse will protect your brand’s reputation Jun. 21, 2017
User guide User Guide for TPS25921EVM-637 Aug. 04, 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 TPS25921xD eFuses are highly integrated circuit protection and power management solution in a small package. These devices use few external components and provide multiple protection modes, along with providing a robust defense against overloads, shorts circuits, voltage surges and excessive (...)

  • 4.5V to 18V operating voltage range  eFuse
  • Up to 1.5A Adjustable ILIMIT setting option using Jumper
  • On board fault and power good LEDs
  • Linear output ramp (gate dV/dt control) option
  • On board test point access for all device level pins

Design tools & simulation

SLVMAE6B.ZIP (95 KB) - PSpice 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
  • (...)
SLUC573.ZIP (72 KB)

Reference designs

ADC-based, digitally-isolated, wide-input, 16-channel, AC/DC binary input reference design
TIDA-00420 This reference design showcases a cost-optimized and scalable ADC-based AC/DC binary input module (BIM) architecture with reinforced isolation. The 16 channels of a 10- or 12-bit SAR ADC are used for sensing multiple binary inputs. The op amps, in addition to keeping the cost per-channel low (...)
document-generic Schematic
Precision Power Limiting Solution
TIDA-00331 This solution limits the power delivered to a maximum of 15W to ensure IEC60730 compliance in Human-Machine-Interaction (HMI) ports, making it very easy for the end equipment to meet the safety regulations.
This design uses TI’s TPS25921AD to monitor the voltage and current flowing through the (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options

Ordering & quality

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