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TPS25946

ACTIVE

2.7-V to 23-V, 5.5-A, 28-mΩ eFuse with bi-directional current support

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Data sheet

TPS25946

ACTIVE
Data sheet Order now

Product details

FET Internal Ron (typ) (mΩ) 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 Circuit breaker, current limiting Soft start Adjustable Overvoltage response Cut-off UL recognition IEC62368, UL2367 Rating Catalog Device type eFuses and hot swap controllers Operating temperature range (°C) -40 to 125 Quiescent current (Iq) (typ) (A) 0.0058 Quiescent current (Iq) (max) (A) 0.008
FET Internal Ron (typ) (mΩ) 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 Circuit breaker, current limiting Soft start Adjustable Overvoltage response Cut-off UL recognition IEC62368, UL2367 Rating Catalog Device type eFuses and hot swap controllers Operating temperature range (°C) -40 to 125 Quiescent current (Iq) (typ) (A) 0.0058 Quiescent current (Iq) (max) (A) 0.008
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
    • File No. E339631

    • RILM ≥ 549 Ω

  • IEC 62368-1 CB certified
  • 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
    • File No. E339631

    • RILM ≥ 549 Ω

  • IEC 62368-1 CB certified
  • 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-V–23-V, 5.5-A, 28-mΩ eFuse with Bidirectional Current Support datasheet (Rev. B) PDF | HTML 04 Apr 2022
Certificate TPS25946x UL2367 Certificate of Compliance E339631 24 Jan 2022
Certificate TPS25946x CB Test Certificate IEC 62368-1 19 Jan 2022
Certificate TPS25946x UL2367 Certificate of Compliance E169910 19 Jan 2022
EVM User's guide TPS25946EVM: Evaluation Module for TPS25946 eFuse (Rev. A) PDF | HTML 27 Aug 2021

Design & development

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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

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Calculation tool

SLVRBH8 — TPS25946 Design Calculator

Supported products & hardware

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eFuses & hot swap controllers
TPS25946 — 2.7-V to 23-V, 5.5-A, 28-mΩ eFuse with bi-directional current support
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Simulation tool

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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 (...)
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VQFN-HR (RPW) 10 Ultra Librarian
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