Texas Instruments TPS259851RQPR

Overview

TPS259851RQPR from Texas Instruments is a stackable 80-A eFuse IC with integrated 0.59-mΩ FET, precise ±1.4% analog current monitoring, fast <200-ns short-circuit response, and adjustable dV/dt slew rate control for inrush management - deployed in high-power server power rails and datacenter switch input protection.

For engineers reviewing the TPS259851RQPR datasheet, TPS259851RQPR pinout, TPS259851RQPR application, or TPS259851RQPR equivalent, key selection criteria include its 60-A RMS/80-A peak rating, ±6% overcurrent threshold accuracy, active load sharing across parallel units, and 16.6-V fixed overvoltage clamp - all in a 4.5-mm × 5-mm QFN-26 package with thermal performance validated to 125°C junction temperature.

Technical Context

The TPS259851RQPR implements a dual-stage overcurrent protection architecture: programmable steady-state circuit-breaker mode (IOCP = 10–60 A, ±6%) with user-adjustable transient blanking via ITIMER capacitor, plus ultrafast fixed/fast-trip short-circuit detection (<200 ns) at up to 2× IOCP. Its integrated FET supports active current sharing during start-up and steady state when paralleled.

It delivers precision analog telemetry through IMON (±1.4% gain accuracy, >500-kHz bandwidth) and die temperature monitoring via TEMP output (2.65 mV/°C), while supporting system-level coordination via SWEN synchronization, PG status signaling, and FLT fault reporting - all managed by an internal controller powered independently via VDD.

Key Specifications

Pinout & Package

TPS259851RQPR uses a thermally enhanced 26-pin QFN package (4.5 mm × 5.0 mm, 0.6-mm pitch) with 4× VIN and 4× VOUT power pins soldered directly to PCB planes for optimal current distribution and thermal dissipation. Clearance between power and GND pins is 29 mil.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS25982ARQPR and MP5418GQH-Z, the TPS259851RQPR uniquely combines 80-A peak capability, active parallel synchronization (SWEN), and ±1.4% analog current monitoring - making it the only option for scalable, telemetry-rich, high-power server and switch power path protection.

Availability

TPS259851RQPR is available at Aetrix Electronics and suitable for server power rail protection, datacenter switch input stages, and graphics card hot-swap applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial OEM programs.

Supply support for TPS259851RQPR 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 ICs - with decades of expertise in high-reliability power protection solutions.

The TPS25985x family was designed specifically for high-current, high-availability infrastructure applications including cloud datacenters, AI accelerators, and telecom equipment - emphasizing stackability, precision telemetry, and robust fault coverage.

FAQ

What is the maximum continuous current rating for the TPS259851RQPR?

The TPS259851RQPR is rated for 60-A RMS continuous current at junction temperatures ≤125°C on a standard 8-layer PCB. Its 80-A peak rating supports brief transients such as CPU/GPU power surges. Thermal design must account for R_θJA(eff) = 19.9°C/W and ensure adequate copper area for the four IN and four OUT pins to maintain safe operating temperature.

How does the TPS259851RQPR achieve accurate current monitoring without an external shunt resistor?

The TPS259851RQPR integrates a precision current-sense amplifier with ±1.4% gain accuracy and >500-kHz bandwidth, delivering analog current data directly via the IMON pin. It uses the internal FET's R_DS(on) as the sensing element - eliminating external shunts while maintaining high fidelity for Intel PSYS/PROCHOT# compliance and predictive maintenance algorithms.

Can multiple TPS259851RQPR devices be paralleled, and how is current sharing ensured?

Yes - the TPS259851RQPR supports unlimited parallel stacking using the SWEN pin for active synchronization and the ILIM/IMON pins for dynamic current sharing. During both startup and steady state, devices coordinate turn-on timing and adjust individual current limits to maintain balance within ±5%, preventing overstress on any single unit in the chain.

What is the role of the DVDT pin on the TPS259851RQPR, and how is it configured?

The DVDT pin on the TPS259851RQPR controls output voltage slew rate during power-up. Connecting a capacitor from DVDT to GND sets the rise time (e.g., 3.3 nF → 9.79 V/ms; 33 nF → 1.20 V/ms). This manages inrush into large bulk capacitors, preventing voltage droop on shared rails and avoiding mechanical stress on connectors - no resistor network is needed.

Does the TPS259851RQPR provide overtemperature protection, and what is its trip threshold?

Yes - the TPS259851RQPR includes integrated overtemperature protection with a thermal shutdown threshold of 150°C and 12.5°C hysteresis. It also monitors FET health via V_DS sensing (0.49 V fault threshold) and reports die temperature via the TEMP pin (2.65 mV/°C), enabling proactive thermal derating before reaching the hard shutdown point.