Texas Instruments TPS25942ARVCT

Overview

TPS25942ARVCT 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), and reverse-current blocking. It delivers precise power path management in redundant DC supplies for PCIe cards, SSDs, and industrial PLCs.

For engineers reviewing the TPS25942ARVCT datasheet, TPS25942ARVCT pinout, TPS25942ARVCT application, or TPS25942ARVCT equivalent, key selection criteria include programmable dV/dt ramp control, IMON current monitoring accuracy (±8%), dual fault response modes (auto-retry vs latched), and UL 2367/UL60950 safety certification compliance.

Technical Context

The TPS25942ARVCT implements a dual-FET architecture enabling bidirectional current control and true reverse-voltage shutoff (<1 µs) when V_IN < (V_OUT – 10 mV). Its programmable thresholds cover overvoltage (±2%), undervoltage (2.2 V–2.4 V), and fast-trip current detection (1.5×I_LIM + 0.375 A).

Control logic supports non-ideal diode mode via DMODE pin (active-high), power-good assertion via PGOOD open-drain output, and fault reporting through FLT (open-drain, active-low). Thermal shutdown triggers at 160°C with 12°C hysteresis and auto-retry recovery after 128 ms.

Key Specifications

Pinout & Package

TPS25942ARVCT uses a 20-pin WQFN package (3.0 mm × 4.0 mm) with exposed thermal pad requiring PCB ground-plane connection via multiple vias for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS25942L RVCT and TPS25944A RVCT, the TPS25942ARVCT uniquely balances responsive current limiting with automatic recovery-making it optimal for systems requiring continuous operation after transient faults without operator intervention.

Availability

TPS25942ARVCT is available at Aetrix Electronics and suitable for PCIe add-in cards, redundant power supply systems, and SSD/HDD power management requiring stable component supply, long-term lifecycle support, and certified safety compliance.

Supply support for TPS25942ARVCT 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 broad industrial, automotive, and enterprise design expertise.

The TPS25942x family targets high-reliability power path management in multi-rail systems, emphasizing programmable protection, safety certification, and compact integration for space-constrained applications.

FAQ

What is the maximum operating voltage for the TPS25942ARVCT?

The TPS25942ARVCT supports an absolute maximum input voltage of 20 V, with recommended operation from 2.7 V to 18 V. This range accommodates standard DC rails including 3.3 V, 5 V, and 12 V, while providing margin for transients up to 22 V (10-ms rating). The device maintains full functionality-including current limiting, OVP, and reverse blocking-across this entire span, making TPS25942ARVCT suitable for adapter-powered and battery-backed systems.

How does the TPS25942ARVCT implement reverse current protection?

The TPS25942ARVCT detects reverse voltage conditions by continuously monitoring the differential between V_IN and V_OUT. When V_IN falls below (V_OUT – 9.3 mV), the internal comparator triggers within 10 µs and forces FLT low while disabling the internal FETs. This action blocks reverse current flow with <1 µs effective shutoff time, preventing backfeed from auxiliary sources into failed main supplies-a critical capability in TPS25942ARVCT-based redundant power architectures.

Can the current limit threshold of the TPS25942ARVCT be adjusted, and how accurate is it?

Yes, the TPS25942ARVCT current limit is set externally via a resistor (R_ILIM) from pin 17 to GND, supporting 0.6 A to 5.3 A with ±8% tolerance across temperature and voltage. For example, a 20-kΩ resistor yields 4.45 A (typ.). The accuracy specification includes process, voltage, and temperature variation, ensuring repeatable trip points in production systems-key for TPS25942ARVCT deployment in SSDs and industrial controllers where overcurrent consistency is mandatory.

What is the purpose of the DMODE pin on the TPS25942ARVCT?

The DMODE pin (Pin 1) on the TPS25942ARVCT configures non-ideal diode mode, an active-high function that enables priority-based source selection in dual-supply systems. When asserted, it allows the device to behave like a forward-biased diode with programmable forward voltage drop, facilitating automatic failover from main to auxiliary supply without external diodes. This feature directly supports TPS25942ARVCT use cases such as redundant 12-V power for PLCs and hot-swap PCIe cards.

Does the TPS25942ARVCT provide analog current monitoring, and how is it implemented?

Yes, the TPS25942ARVCT provides analog current monitoring via the IMON pin (Pin 19), which sources a scaled replica of load current at 52.3 µA/A (±8%). A resistor from IMON to GND converts this current to a proportional voltage (e.g., 523 mV at 10 A), enabling direct ADC measurement. This feature supports real-time telemetry, predictive maintenance, and closed-loop load control-making TPS25942ARVCT valuable in intelligent power banks and enterprise storage systems requiring precise current visibility.