Texas Instruments TPS259271DRCR

Overview

TPS259271DRCR from Texas Instruments is a 4.5-V to 18-V eFuse IC with integrated 28-mΩ pass MOSFET, programmable current limit (1–5 A), reverse current blocking support via BFET-controlled external NFET, and auto-retry thermal shutdown. It protects SSDs, PCIe cards, and server auxiliary supplies against overcurrent, short circuit, inrush, and reverse conduction.

For engineers reviewing the TPS259271DRCR datasheet, TPS259271DRCR pinout, TPS259271DRCR application, or TPS259271DRCR equivalent, key selection criteria include adjustable ILIM accuracy (±8% at 3.7 A), dV/dT-controlled output slew rate, UL 2367 recognition, and auto-retry fault recovery behavior-critical for unattended industrial and storage systems.

Technical Context

The TPS259271DRCR implements a high-side eFuse architecture with dual-stage current limiting: a fast-trip comparator (IFASTRIP = 1.6 × IOL) responds in 300 ns to transient shorts, while the main current-limit amplifier regulates sustained overload at up to 5 A. Its BFET driver provides 2-µA gate charge and 26-Ω discharge path for sub-µs external NFET turnoff.

Thermal management uses a dedicated junction sensor with 150°C shutdown threshold and 10°C hysteresis; the TPS259271 variant enters auto-retry mode upon cooling below 140°C, unlike the latched TPS259270. UVLO is fixed at 4.3 V (±150 mV), and EN/UVLO serves dual roles-enable control and programmable undervoltage detection via resistor divider.

Key Specifications

Pinout & Package

TPS259271DRCR is housed in a 10-pin VSON package (3.0 mm × 3.0 mm, 0.5-mm pitch) with exposed thermal pad for enhanced heat dissipation. The package supports JEDEC-standard reflow and achieves R_θJA = 45.9°C/W under standard 2-layer board conditions.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar eFuse applications.

Compared with TPS259270DRCR, the TPS259271DRCR enables hands-off recovery from thermal faults-reducing maintenance overhead in dense storage arrays. Against TPS25942ARVCR, it trades OV clamp capability for superior current-limit accuracy and lower R_DS(on), optimizing efficiency in stable 12-V environments.

Availability

TPS259271DRCR is available at Aetrix Electronics and suitable for HDD/SSD drives, server auxiliary supplies, and PCIe card power management requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS259271DRCR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The TPS25927x product line delivers highly integrated eFuse protection for high-density power distribution-designed specifically for storage, computing, and infrastructure systems needing robust, compact, and standards-compliant current limiting.

FAQ

What is the maximum continuous input voltage rating for the TPS259271DRCR?

The TPS259271DRCR has an absolute maximum input voltage rating of 20 V, with recommended continuous operation from 4.5 V to 18 V. Exceeding 18 V places the device in overvoltage protection mode, limiting output voltage and increasing power dissipation-potentially triggering thermal shutdown. The TPS259271DRCR must not be operated above 20 V even transiently.

How does the BFET pin function in the TPS259271DRCR, and what external component is required?

The BFET pin on the TPS259271DRCR drives the gate of an external N-channel MOSFET connected back-to-back with the load to block reverse current flow. It sources 2 µA to charge the gate and discharges it through a 26-Ω internal path for sub-microsecond turnoff. A discrete NFET (e.g., DMN3025LSD) is required; no additional driver circuitry is needed. The TPS259271DRCR's BFET functionality is inactive if the pin is left floating.

What is the current limit accuracy of the TPS259271DRCR, and how is it set?

The TPS259271DRCR provides ±8% current limit accuracy at 3.7 A, achieved by connecting a precision resistor (R_ILIM) between the ILIM pin and GND. R_ILIM values from 10 kΩ to 162 kΩ set I_OL from 1 A to 5 A per the formula I_OL ≈ 0.7/(R_ILIM × 10⁻⁶). The TPS259271DRCR also detects open-circuit R_ILIM at 3.1 V and limits current to 0.73 A in that fault condition.

Does the TPS259271DRCR support programmable undervoltage lockout (UVLO), and how is it configured?

Yes-the EN/UVLO pin of the TPS259271DRCR supports dual-mode operation. When used as UVLO, a resistor divider from VIN to GND sets the trip point; the internal comparator triggers at 4.3 V (±150 mV) on the EN/UVLO node. This allows custom UVLO thresholds below 4.3 V. As a standalone enable pin, it turns the device on above 1.4 V and off below 1.35 V. The TPS259271DRCR does not support programmable UVLO above 4.3 V.

What thermal protection behavior does the TPS259271DRCR exhibit during overtemperature events?

The TPS259271DRCR features auto-retry thermal shutdown: when junction temperature exceeds 150°C, it disables the internal MOSFET and remains off until temperature falls below 140°C (10°C hysteresis), then automatically attempts restart. This cycle repeats until the thermal fault is cleared. Unlike the latched TPS259270DRCR, the TPS259271DRCR requires no external reset signal-making it ideal for thermally dynamic environments like fan-cooled servers or enclosed storage enclosures.