Texas Instruments TPS259261DRCT

Overview

TPS259261DRCT from Texas Instruments is a 12-V eFuse protection switch with integrated 30-mΩ pass MOSFET, 15-V fixed over-voltage clamp, adjustable 2–5-A current limit (±15% accuracy), programmable dV/dT slew rate control, and auto-retry thermal shutdown. It serves as a hot-swap controller in auxiliary 12-V power rails for PCIe cards and server subsystems.

For engineers reviewing the TPS259261DRCT datasheet, TPS259261DRCT pinout, TPS259261DRCT application, or TPS259261DRCT equivalent, key selection criteria include its 15-V OVP clamp for 12-V systems, auto-retry fault response versus latched alternatives, EN/UVLO dual-function pin behavior, and VSON-10 package thermal performance under sustained 5-A load conditions.

Technical Context

The TPS259261DRCT implements a precision current-limit amplifier with fast-trip comparator (IFASTRIP = 1.6 × IOL) for transient short-circuit suppression, combined with internal thermal sensing (TSHDN = 150°C, 10°C hysteresis) and UVLO monitoring (4.3 V rising threshold). Its dV/dT pin uses a 220-nA charging current and 70-pF internal capacitance to program output ramp time via external capacitor.

It operates across –40°C to +125°C junction temperature, supports 4.5–13.8 V input, delivers up to 5 A continuous output, and features UL 2367 recognition (E339631) with RILIM ≤130 kΩ. Fault handling is auto-retry-unlike latched variants TPS259260-enabling autonomous recovery after thermal faults.

Key Specifications

Pinout & Package

TPS259261DRCT is housed in a 10-pin VSON package (3.00 mm × 3.00 mm) with exposed thermal pad (EP) connected to GND for enhanced thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS259260DRCT, TPS259261DRCT enables automatic recovery from thermal overload without host intervention-critical for server AUX rails-while matching all protection thresholds and accuracy. Against TPS25942ARVCR, it offers precise dV/dT control and smaller footprint for 12-V applications but lacks wide-input flexibility.

Availability

TPS259261DRCT is available at Aetrix Electronics and suitable for servers and AUX supplies, PCIe card hot-plug interfaces, and 12-V SSD power delivery requiring stable component supply and long-term production support.

Supply support for TPS259261DRCT 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 TPS2592xx family is designed specifically for robust, space-efficient eFuse protection in 5-V and 12-V power distribution networks-emphasizing integration, safety certification, and ease of use in high-density computing infrastructure.

FAQ

What is the over-voltage clamp voltage of the TPS259261DRCT?

The TPS259261DRCT features a fixed 15-V over-voltage clamp (VOVC), which activates when input voltage exceeds ~16.5 V. This protects downstream 12-V loads from damaging transients without external components. The clamp is specified at 13.8–16.5 V across temperature and load conditions, and is intrinsic to the TPS259261DRCT's internal architecture-not adjustable or dependent on external parts.

How does the TPS259261DRCT implement auto-retry thermal shutdown?

The TPS259261DRCT triggers thermal shutdown at 150°C (TSHDN) and enters auto-retry mode-unlike latched variants. After junction temperature drops below 140°C (10°C hysteresis), it waits 145 ms before attempting re-enabling. This cycle repeats until the fault clears. This behavior is inherent to the TPS259261DRCT silicon design and requires no external timing components.

Can the TPS259261DRCT be used in 5-V systems?

No-the TPS259261DRCT is optimized for 12-V systems and specifies a 15-V OVP clamp. For 5-V applications, TI recommends the TPS25925x series (e.g., TPS259251DRCT) with 6.1-V clamp. Using TPS259261DRCT at 5 V violates recommended operating conditions and risks unreliable UVLO activation and insufficient OVP margin.

What is the purpose of the dV/dT pin on the TPS259261DRCT?

The dV/dT pin on the TPS259261DRCT controls output voltage slew rate during power-on. Connecting a capacitor (1–1000 nF) between this pin and GND sets the ramp time-e.g., 0.4 ms (no cap) to 12 ms (1 nF). This prevents inrush current spikes into capacitive loads like SSDs or PCIe cards, and is a core functional feature of the TPS259261DRCT-not optional or auxiliary.

How is current limit set on the TPS259261DRCT?

Current limit on the TPS259261DRCT is set by a single resistor (RILIM) from the ILIM pin to GND. Values from 10 kΩ to 162 kΩ yield 2–5 A overload limits with ±15% accuracy. The relationship is defined as I_OL ≈ 0.7/(RILIM × 10⁻⁶) A. This resistor-based programming is a defining characteristic of the TPS259261DRCT, enabling precise, layout-simple current tailoring without DACs or digital interfaces.