Product details


FET Internal Ron (Typ) (mOhm) 28.3 Vin (Min) (V) 2.7 Vin (Max) (V) 23 Vabsmax_cont (V) 28 Current limit (Min) (A) 0.5 Current limit (Max) (A) 6 Overcurrent response current limiting Fault response Auto Retry, Latch Off UL recognition UL2367 IEC62368 (pending) open-in-new Find other eFuses & hot swap controllers

Package | Pins | Size

VQFN-HR (RPW) 10 4 mm² 2 x 2 open-in-new Find other eFuses & hot swap controllers


  • Wide operating input voltage range: 2.7 V to 23 V
    • 28-V absolute maximum
  • Integrated back-to-back FETs with low On-Resistance: RON = 28.3 mΩ (typ)
    • Bi-directional current flow during ON state
    • Reverse current blocking during OFF state
  • Fast overvoltage protection
    • Adjustable Overvoltage Lockout (OVLO) with 1.2-µs (typ) response time
  • Overcurrent protection in forward direction with load current monitor output (ILM)
    • Active current limit response
    • Adjustable threshold (ILIM) 0.5 A - 6 A
      • ±10% accuracy for ILIM > 1 A
    • Adjustable transient blanking timer (ITIMER) to allow peak currents up to 2 × ILIM
    • Output load current monitor accuracy: ±6% (IOUT ≥ 1 A)
  • Fast-trip response for short-circuit protection on OUT pin
    • 500-ns (typ) response time
    • Adjustable (2 × ILIM) and fixed thresholds
  • Active high enable input with adjustable undervoltage lockout threshold (UVLO)
  • Adjustable output slew rate control (dVdt)
  • Overtemperature protection
  • Power Good indication (PG) with adjustable threshold (PGTH)
  • UL 2367 recognition (pending)
  • IEC 62368 CB certification (pending)
  • Small footprint: QFN 2 mm × 2 mm, 0.45-mm pitch

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The TPS25946xx family of eFuses is a highly integrated circuit protection and power management solution in a small package. The devices provide multiple protection modes using very few external components and are a robust defense against overloads, short-circuits, voltage surges and excessive inrush current. With integrated back-to-back FETs, the device allows bi-directional current flow during ON state, while blocking current flow in both directions during OFF state, making it well suited for USB OTG (On-The-Go) applications.

Output slew rate and inrush current can be adjusted using a single external capacitor. Loads are protected from input overvoltage conditions by cutting off the output if input exceeds an adjustable overvoltage threshold. The devices respond to output overload by actively limiting the current. The output current limit threshold as well as the transient overcurrent blanking timer are user adjustable. The current limit control pin also functions as an analog load current monitor.

The devices are available in a 2-mm × 2-mm, 10-pin HotRod QFN package for improved thermal performance and reduced system footprint.

The devices are characterized for operation over a junction temperature range of –40°C to +125°C.

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NEW TPS25947 ACTIVE 2.7-V to 23-V, 28-mΩ, 5.5-A eFuse with integrated reverse polarity protection 2.7-V to 23-V, 5.5A eFuse with always on reverse current blocking

Technical documentation

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Type Title Date
* Data sheet TPS25946xx 2.7 - 23 V, 5.5 A, 28-mΩ eFuse with Bidirectional Current Support datasheet May 06, 2021
User guide TPS25946EVM: Evaluation Module for TPS25946 eFuse May 03, 2021

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 TPS25946EVM eFuse evaluation board allows reference circuit evaluation of the TPS25946 eFuse. The TPS25946 device is a 2.7-V to 23-V, 5.5-A eFuse with integrated 28.3-mΩ FET. The TPS259460x family of eFuses have reverse current protection when disabled, bi-directional current flowing (...)

  • 2.7-V to 23-V (typ.) operation
  • 0.5-A to 6-A programmable current limit using onboard jumpers
  • Adjustable output voltage slew rate control, transient current blanking timer, current limit
  • LED status indication for power good output
  • Onboard Schottky diode at output prevents negative spike during (...)

Design tools & simulation

SLVMDL1.ZIP (111 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
  • (...)

CAD/CAE symbols

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VQFN-HR (RPW) 10 View options

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