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
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
VQFN-HR (RPW) 10 4 mm² 2 x 2
  • 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 to 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
  • Digital Indication Options:
    • Power Good indication (PG) with adjustable threshold (PGTH) or
    • Supply Good (SPLYGD) and Fault (FLT) indications
  • UL 2367 recognition (pending)
  • IEC 62368 CB certification (pending)
  • Small footprint: QFN 2 mm × 2 mm, 0.45-mm pitch
  • 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 to 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
  • Digital Indication Options:
    • Power Good indication (PG) with adjustable threshold (PGTH) or
    • Supply Good (SPLYGD) and Fault (FLT) indications
  • UL 2367 recognition (pending)
  • IEC 62368 CB certification (pending)
  • Small footprint: QFN 2 mm × 2 mm, 0.45-mm pitch

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.

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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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 (Rev. A) 26 Aug 2021
User guide TPS25946EVM: Evaluation Module for TPS25946 eFuse (Rev. A) 27 Aug 2021

Design & development

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

Evaluation board

TPS25946EVM — TPS25946 evaluation module 2.7-V to 23-V, 5.5-A, 28-mΩ eFuse with bi-directional current support

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 capability (...)

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Simulation model

TPS25946 PSpice Transient Model

SLVMDL1.ZIP (111 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

TPS25946 Design Calculator (Rev. A)

SLVRBH8A.ZIP (91 KB)
Package Pins Download
VQFN-HR (RPW) 10 View options

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