Texas Instruments TPS25942LRVCT

Overview

TPS25942LRVCT from Texas Instruments is a 2.7 V–18 V, 5-A eFuse Power MUX IC with integrated back-to-back MOSFETs, 42 mΩ typical R_ON, ±8% adjustable current limit (0.6 A–5.3 A), reverse current blocking, and programmable dV/dt control - used for power path management in redundant DC systems and PCIe/NIC power rails.

For engineers reviewing the TPS25942LRVCT datasheet, TPS25942LRVCT pinout, TPS25942LRVCT application, or TPS25942LRVCT equivalent, key selection criteria include latch-mode fault response, UL 2367 recognition, IMON current monitoring accuracy (±8%), and WQFN-20 package thermal performance (R_θJB = 13.6 °C/W).

Technical Context

The TPS25942LRVCT implements dual-MOSFET architecture with true reverse voltage shutoff (<1 µs) and non-ideal diode mode controlled via DMODE pin. It monitors V(IN) and V(OUT) differentially to enforce reverse blocking when V(IN) < (V(OUT) – 10 mV), and supports priority arbitration between main/auxiliary supplies using FLT and DMODE logic states.

Its protection suite includes programmable overvoltage (±2% threshold), undervoltage lockout (2.3 V typ, 116 mV hysteresis), fast-trip comparator (1.5×I_LIM + 0.375 A), and thermal shutdown at 160 °C with 12 °C hysteresis - all operating across –40 °C to +125 °C junction temperature.

Key Specifications

Pinout & Package

TPS25942LRVCT uses a 20-pin WQFN package (3.00 mm × 4.00 mm) with exposed thermal PowerPAD requiring multi-via connection to PCB ground plane for optimal thermal dissipation (R_θJB = 13.6 °C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS25942LRVCT, TPS25942ARVCT offers auto-retry for transient faults but lacks guaranteed fault hold, while TPS25944LRVCT trades immediate current limiting for timed overload tolerance - both share identical thermal, electrical, and layout compatibility.

Availability

TPS25942LRVCT is available at Aetrix Electronics and suitable for PCIe/NIC power muxing, redundant server PSU designs, and industrial SSD power management requiring stable component supply, long-term lifecycle support, and UL-certified protection.

Supply support for TPS25942LRVCT 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 specializing in analog, embedded processing, and power management technologies with decades of industrial-grade reliability validation.

The TPS25942x family is designed for high-reliability power path control in enterprise storage, networking, and industrial automation - emphasizing latch-mode safety, reverse-current immunity, and regulatory compliance.

FAQ

What is the fault response behavior of the TPS25942LRVCT?

The TPS25942LRVCT uses latched fault response: upon overcurrent, overvoltage, undervoltage, reverse voltage, or thermal shutdown, the FLT pin asserts low and the internal FET remains off until EN/UVLO is actively pulled to GND. This ensures persistent fault isolation without automatic retry, making TPS25942LRVCT ideal for safety-critical or maintenance-controlled systems where unattended recovery is undesirable.

How is current limit set on the TPS25942LRVCT?

Current limit on the TPS25942LRVCT is set by an external resistor (R_ILIM) connected between the ILIM pin and GND. With R_ILIM = 16.9 kΩ, the device limits at 5.2 A (±8%); with R_ILIM = 150 kΩ, it limits at 0.58 A. The relationship is monotonic and documented in the datasheet's Electrical Characteristics table - no calibration or trimming is required for production use of TPS25942LRVCT.

Does the TPS25942LRVCT support reverse current blocking?

Yes, the TPS25942LRVCT provides true reverse current blocking with <1 µs response time. It continuously monitors V(IN) – V(OUT) and disables the internal FETs when V(IN) falls below (V(OUT) – 10 mV), preventing backfeed from load to source. This eliminates the need for external reverse-polarity protection diodes or MOSFETs in TPS25942LRVCT-based designs.

What package type and thermal performance does the TPS25942LRVCT use?

The TPS25942LRVCT uses a 20-pin WQFN package (3.00 mm × 4.00 mm) with an exposed thermal PowerPAD. Its junction-to-board thermal resistance (R_θJB) is 13.6 °C/W when properly mounted with ≥6 thermal vias to a solid ground plane - enabling 5 A continuous operation at +85 °C ambient without forced airflow in typical 2-layer PCB layouts using TPS25942LRVCT.

Is the TPS25942LRVCT UL-recognized for safety compliance?

Yes, the TPS25942LRVCT is UL 2367 recognized (File No. 169910) and compliant with UL60950 single-point-failure requirements. This certification covers open/short ILIM detection, fault latch integrity, and thermal shutdown robustness - allowing direct use in end-equipment seeking UL listing without additional component-level safety analysis for TPS25942LRVCT.