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eFuses (integrated hot swaps)

TPS25940

ACTIVE

2.7-V to 18-V, 42mΩ, 0.6-5.2A eFuse with reverse current blocking and DevSleep support

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Data sheet

TPS25940

ACTIVE
Data sheet Order now

Product details

Vabsmax_cont (V) 20 Vin (max) (V) 18 Vin (min) (V) 2.7 Current limit (max) (A) 5.2 Current limit (min) (A) 0.6 Features Adjustable current limit, Adjustable soft start, Current monitoring, Fault output, Overcurrent protection, Overvoltage protection, Power good signal, Reverse current blocking always, Short-circuit protection, Thermal shutdown UL recognition UL2367, UL60950 Overcurrent response Current limiting Fault response Auto-retry, Latch-off Ron (typ) (mΩ) 42 Overvoltage response Cut-off Rating Catalog Soft start Adjustable Quiescent current (Iq) (typ) (A) 0.000199 Quiescent current (Iq) (max) (A) 0.00026 Device type eFuses and hot swap controllers Operating temperature range (°C) -40 to 85
Vabsmax_cont (V) 20 Vin (max) (V) 18 Vin (min) (V) 2.7 Current limit (max) (A) 5.2 Current limit (min) (A) 0.6 Features Adjustable current limit, Adjustable soft start, Current monitoring, Fault output, Overcurrent protection, Overvoltage protection, Power good signal, Reverse current blocking always, Short-circuit protection, Thermal shutdown UL recognition UL2367, UL60950 Overcurrent response Current limiting Fault response Auto-retry, Latch-off Ron (typ) (mΩ) 42 Overvoltage response Cut-off Rating Catalog Soft start Adjustable Quiescent current (Iq) (typ) (A) 0.000199 Quiescent current (Iq) (max) (A) 0.00026 Device type eFuses and hot swap controllers Operating temperature range (°C) -40 to 85
WQFN (RVC) 20 12 mm² (4 mm × 3 mm)
  • 2.7 V – 18 V Operating Voltage, 20 V (Max)
  • 42 mΩ RON (Typical)
  • 0.6 A to 5.3 A Adjustable Current Limit (±8%)
  • IMON Current Indicator Output (±8%)
  • 200 µA Operating IQ (Typical)
  • 95 µA DevSleep Mode IQ (Typical)
  • 15 µA Disabled IQ (Typical)
  • ±2% Overvoltage, Undervoltage Threshold
  • Reverse Current Blocking
  • 1 µs Reverse Voltage Shutoff
  • Programmable dVo/dt Control
  • Power Good and Fault Outputs
  • –40°C to 125°C Junction Temperature Range
  • UL 2367 Recognized
    • File No. 169910
    • RILIM ≥ 20 kΩ (4.81 A max)
  • UL60950 - Safe during Single Point Failure Test
    • Open/Short ILIM detection
  • 2.7 V – 18 V Operating Voltage, 20 V (Max)
  • 42 mΩ RON (Typical)
  • 0.6 A to 5.3 A Adjustable Current Limit (±8%)
  • IMON Current Indicator Output (±8%)
  • 200 µA Operating IQ (Typical)
  • 95 µA DevSleep Mode IQ (Typical)
  • 15 µA Disabled IQ (Typical)
  • ±2% Overvoltage, Undervoltage Threshold
  • Reverse Current Blocking
  • 1 µs Reverse Voltage Shutoff
  • Programmable dVo/dt Control
  • Power Good and Fault Outputs
  • –40°C to 125°C Junction Temperature Range
  • UL 2367 Recognized
    • File No. 169910
    • RILIM ≥ 20 kΩ (4.81 A max)
  • UL60950 - Safe during Single Point Failure Test
    • Open/Short ILIM detection

The TPS25940 eFuse Power Switch is a compact, feature rich power management device with a full suite of protection functions, including a low power DevSleep™ mode that supports compliance with the SATA™ Device Sleep standard. 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 the low IQ DevSleep mode simplify SSD power management design.

The TPS25940 monitors V(IN) and V(OUT) to provide true reverse current blocking when V(IN) < (V(OUT) - 10 mV). This function supports swift changeover to a boosted voltage energy storage element in systems where backup voltage is greater than bus voltage.

The TPS25940 eFuse Power Switch is a compact, feature rich power management device with a full suite of protection functions, including a low power DevSleep™ mode that supports compliance with the SATA™ Device Sleep standard. 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 the low IQ DevSleep mode simplify SSD power management design.

The TPS25940 monitors V(IN) and V(OUT) to provide true reverse current blocking when V(IN) < (V(OUT) - 10 mV). This function supports swift changeover to a boosted voltage energy storage element in systems where backup voltage is greater than bus voltage.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet TPS25940x 2.7 – 18V eFuse with True Reverse Blocking and DevSleep Support for SSDs datasheet (Rev. A) PDF | HTML Mar 26, 2015
Certificate TPS25940 CB Test Certificate IEC 62368-1 Jul 8, 2021
Certificate TPS2594x UL Certificate of Compliance UL 2367 Apr 10, 2020
Functional safety information eFuse: Safety Certification and why it Matters Mar 18, 2020
Certificate TPS25940 UL Certificate of Compliance IEC 62368-1 Jan 17, 2020
E-book 11 Ways to Protect Your Power Path Jul 3, 2019
Application note Minimizing System Down-time with Smart eFuses Jun 12, 2019
Application note Basics of eFuses (Rev. A) Apr 5, 2018
Application note Charging Super Capacitor With eFuse Aug 8, 2017
Technical article How adding an eFuse will protect your brand’s reputation PDF | HTML Jun 21, 2017
Application note Power Multiplexing Using Load Switches and eFuses (Rev. A) Jun 20, 2017
Application note Achieve 20-A Circuit Protection and Space Efficiency Using Paralleled eFuses Nov 3, 2016
Technical article eFuses: clamping and cutoff and auto retry, oh my! – part 2/3 PDF | HTML May 26, 2016
Technical article eFuses: clamping and cutoff and auto retry, oh my! – part 1/3 PDF | HTML May 10, 2016

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 (...)

User guide: PDF
Supported products & hardware
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Simulation model

TPS25940A Unencrypted PSpice Transient Model Package (Rev. C)

SLVMAB0C.ZIP (72 KB) - PSpice model
Supported products & hardware
Simulation model

TPS25940L Unencrypted PSpice Transient Model Package (Rev. C)

SLVMAB1C.ZIP (72 KB) - PSpice model
Supported products & hardware
Calculation tool

SLVC571 — TPS2594x Design Calculation Tool

Supported products & hardware
Calculation tool

TVS-RECOMMENDATION-CALC — TVS diode recommendation tool

This tool suggests suitable TVS for given system parameters and abs max voltage rating of the device.
Supported products & hardware
Reference design

TIDA-00304 — Last Gasp Hold Up Energy Storage Solution

This solution stores and delivers "last gasp" energy for systems, such as SSDs, that require functionality for a short time after power loss in order to shut down in a controlled fashion. By storing holdup energy at higher than bus voltage the amount of capacitance can be reduced by up to 80%, (...)

Supported products & hardware
Reference design

TIDA-00429 — e-Fuse Power Switch with DevSleep SATA Interface

TPS25940A provides a dedicated DevSleep interface terminal (DEVSLP) to force the device in low power mode. The DEVSLP pin is compatible with standard hardware signals asserted from the host controller. When pulled high, it puts the device in low power DevSleep mode. In this mode, the quiescent (...)

Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
WQFN (RVC) 20 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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