Texas Instruments
2.7–18 V eFuse with true reverse blocking, 42 mΩ, adjustable 0.6–5.3 A current limit, DevSleep, auto-retry, WQFN-20 (RVC)
The Texas Instruments TPS25940ARVCR is a compact eFuse (integrated hot-swap) for 2.7 V to 18 V power rails. Integrated back-to-back FETs with 42 mΩ typical on-resistance provide true reverse current blocking, while an adjustable current limit (0.6 A to 5.3 A, ±8%), programmable dV/dt soft start, ±2% overvoltage and undervoltage thresholds, power-good and fault outputs, and thermal shutdown protect the downstream load. A low-power DevSleep mode supports the SATA Device Sleep standard, which is why the part is widely designed into SSDs, as well as hot-plug boards, adapters and storage and server power paths. The “A” version restarts automatically after a fault (auto-retry); the TPS25940L is the latch-off version. It comes in a 4 mm × 3 mm 20-pin WQFN (RVC) on tape and reel.
Key Specifications
Verify against the original datasheet before quoting.
| Input Voltage | 2.7 V to 18 V (20 V abs. max) |
|---|---|
| On-Resistance | 42 mΩ typical, back-to-back FETs |
| Current Limit | 0.6 A to 5.3 A adjustable, ±8% accuracy |
| Reverse Blocking | True reverse current blocking, 1 µs shutoff |
| Fault Response | Auto-retry (A version) |
| Low-Power Mode | DevSleep, 95 µA typical |
| Package | WQFN-20 (RVC), 4 mm × 3 mm |
| Junction Temperature | -40 °C to 125 °C |
Market Status — as of November 2026
Available on Request Factory lead time is currently around 26 weeks.
Quality & Traceability
Cerametronics is ISO 9001 certified and products are RoHS compliant, with counterfeit screening and full traceability on every shipment. A Certificate of Conformance is available on request. For allocation-sensitive or high-risk lots, independent third-party lab verification can be arranged — just flag it on your RFQ. Any lot that fails incoming inspection is quarantined and never shipped.
FAQ
What is the difference between TPS25940A and TPS25940L?
They share the same 2.7–18 V eFuse core. TI’s datasheet lists TPS25940A as auto-retry and TPS25940L as latched: after a fault the L version keeps the FET off until EN/UVLO is cycled. Confirm which fault behavior your design expects before substituting one for the other.
Is TPS25940ARVCR suitable for SSD power paths with DevSleep?
Yes. TI specifies a DevSleep low-power mode (about 95 µA typical quiescent current) that supports the SATA Device Sleep standard, together with true reverse current blocking for the SSD hold-up rail.
Is TPS25940ARVCR end-of-life?
No. TI lists the TPS25940 family as Active. Supply difficulty comes from extended factory lead times, not from an EOL notice.
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