Texas Instruments TPS259240DRCT

Overview

TPS259240DRCT from Texas Instruments is a 12-V eFuse IC with integrated 28-mΩ pass MOSFET, fixed 15-V overvoltage clamp, latched thermal shutdown, and reverse current blocking support via BFET-controlled external NFET. It operates from 4.5 V to 13.8 V, delivers up to 5-A adjustable current limit (±8% accuracy at 3.7 A), and enables controlled output slew rate via dV/dT capacitor-used in SSD power rails, server AUX supplies, and PCIe card hot-swap protection.

For engineers reviewing the TPS259240DRCT datasheet, TPS259240DRCT pinout, TPS259240DRCT application, or TPS259240DRCT equivalent, key selection criteria include its latched fault response (vs. auto-retry in TPS259241), BFET-driven back-to-back FET control for reverse current isolation, programmable ILIM resistor interface, and UL 2367 recognition for safety-critical power distribution.

Technical Context

The TPS259240DRCT implements a high-side eFuse architecture with dual-stage current limiting: a fast-trip comparator (160% of IOL) responds in 300 ns to short-circuit transients, while the main current-limit amplifier regulates sustained overload at user-set thresholds. Its BFET driver provides active gate control for an external blocking NFET, enabling true bidirectional isolation during input droop or failure.

Voltage protection includes a fixed 15-V internal overvoltage clamp (VOVC) that activates when VIN exceeds ~16.5 V, plus UVLO with 4.3-V rising threshold and 5% hysteresis. Thermal shutdown triggers at 150°C with 10°C hysteresis and latched behavior-requiring EN/UVLO toggle or power cycle to recover.

Key Specifications

Pinout & Package

TPS259240DRCT uses a 10-pin VSON package (3.00 mm × 3.00 mm) with exposed thermal pad. The package supports high-power dissipation (R_θJA = 45.9°C/W) and is optimized for compact, thermally demanding board layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS259240DRCT, TPS259241DRCT offers identical protection features but recovers automatically after thermal faults, whereas TPS25942ARVCR trades BFET control and latched behavior for lower R_DS(on) and wider input range-making it unsuitable as a drop-in replacement.

Availability

TPS259240DRCT is available at Aetrix Electronics and suitable for SSD power rail protection, server AUX supply management, and PCIe card hot-swap applications requiring stable component supply, long-term lifecycle support, and certified safety compliance.

Supply support for TPS259240DRCT 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 with emphasis on reliability, efficiency, and system-level integration.

The TPS25924x product line is designed specifically for high-density, high-reliability power distribution in storage, computing, and communications infrastructure-emphasizing integrated protection, minimal external components, and safety certification readiness.

FAQ

What is the primary function of the BFET pin on the TPS259240DRCT?

The BFET pin on the TPS259240DRCT sources 2 µA to charge and sinks current via a 26-Ω internal resistor to discharge the gate of an external NFET. This enables back-to-back FET configurations that block reverse current flow from load to source-critical in SSDs and other systems with large holdup capacitors. The BFET pin is inactive when left floating, and its operation is synchronized with EN/UVLO and VIN UVLO events.

How does the TPS259240DRCT differ from the TPS259241DRCT in fault handling?

The TPS259240DRCT implements latched thermal and overcurrent shutdown: once triggered, the output remains off until EN/UVLO is toggled low-then-high or power is cycled. In contrast, the TPS259241DRCT uses auto-retry behavior-automatically attempting restart after temperature falls below TSHDN – 10°C. Both share identical pinout, electrical specs, and protection features except for this fault recovery mode.

What is the recommended method to set the current limit for the TPS259240DRCT?

The TPS259240DRCT current limit is set by connecting a resistor (RILIM) between the ILIM pin and GND. Values from 10 kΩ to 162 kΩ yield 1 A to 5 A nominal limits, with ±8% accuracy at 3.7 A. For example, a 100-kΩ resistor sets ~3.75 A. Open or shorted RILIM invokes fail-safe limits (0.73 A or 0.84 A) validated under UL60950 single-point-failure testing.

Does the TPS259240DRCT require external components for overvoltage protection?

No-the TPS259240DRCT includes a fixed 15-V internal overvoltage clamp (VOVC) that activates when VIN exceeds ~16.5 V. This clamping occurs without any external components and protects downstream loads from input surges up to 20 V absolute maximum. The clamp operates independently of the current limit and thermal shutdown circuits, ensuring robust voltage defense even during overload conditions.

What package type and thermal characteristics apply to the TPS259240DRCT?

The TPS259240DRCT uses a 10-pin VSON package (DRC suffix) measuring 3.00 mm × 3.00 mm with an exposed thermal pad. Its thermal resistance is R_θJA = 45.9°C/W (junction-to-ambient) and R_θJB = 21.2°C/W (junction-to-board), enabling reliable operation at up to 5 A continuous current when properly mounted on a 2-layer PCB with ≥1 in² copper pour under the EP pad.