Texas Instruments TPS259525DSGR

Overview

TPS259525DSGR from Texas Instruments is a 2.7 V to 18 V, 4-A eFuse IC with 34-mΩ on-resistance, 3.8-V fast overvoltage clamp (5 µs response), auto-retry fault recovery, and integrated quick output discharge (QOD) functionality. It operates as a smart power switch in hot-swap and adapter-powered systems, protecting downstream circuits from overvoltage, overcurrent, and inrush surges.

For engineers reviewing the TPS259525DSGR datasheet, TPS259525DSGR pinout, TPS259525DSGR application, or TPS259525DSGR equivalent, key selection criteria include its 3.8-V OVC clamp threshold, QOD support for controlled discharge, adjustable current limit (0.5–4 A), dV/dt slew rate control, and UL 2367/IEC 62368-1 safety certification.

Technical Context

The TPS259525DSGR implements an internal MOSFET-based eFuse architecture with factory-set 3.8-V overvoltage clamp and auto-retry thermal shutdown behavior. Its EN/UVLO pin supports resistor-divider–based undervoltage lockout, while the ILM pin provides dual-function current limiting and analog load-current monitoring with ±7.5% accuracy.

It integrates a dV/dt control loop using an external capacitor to manage output slew rate, and features a dedicated QOD pin (Pin 6) that enables rapid discharge of output capacitance upon disable-distinct from FLT-only variants. The device is characterized from –40°C to +125°C and supports safe single-point-failure operation per IEC 62368-1.

Key Specifications

Pinout & Package

TPS259525DSGR uses an 8-pin WSON package (2.00 mm × 2.00 mm) with exposed thermal pad (GND). Pin 1 is dVdt; Pin 2 is EN/UVLO (active-high); Pins 3–4 are IN (dual power input); Pin 5 is OUT; Pin 6 is QOD (not FLT); Pin 7 is ILM; Pin 8 is GND; the exposed pad must be soldered to PCB GND for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS259521DSGR and TPS259421RTER, the TPS259525DSGR uniquely combines 3.8-V clamping, 4-A capability, and integrated QOD in a 2-mm WSON - making it optimal for space-constrained 3.3-V systems requiring robust hot-swap and fast discharge.

Availability

TPS259525DSGR is available at Aetrix Electronics and suitable for hot-swap, adapter-powered consumer electronics, and industrial SSD/HDD applications requiring stable component supply, long-term lifecycle support, and certified safety compliance.

Supply support for TPS259525DSGR 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 personal electronics markets.

The TPS2595xx family was designed specifically for high-reliability power path protection in systems demanding fast overvoltage response, accurate current limiting, and safety-certified operation - targeting hot-swap, computing, and industrial equipment.

FAQ

What is the overvoltage clamp threshold and response time of the TPS259525DSGR?

The TPS259525DSGR features a factory-set 3.8-V (typical) overvoltage clamp with a 5-µs typical response time when output current exceeds 4 A. This clamping action limits the output voltage to protect downstream 3.3-V components during input transients. The clamp remains active until the overvoltage condition clears, and the device resumes normal operation under auto-retry mode. Confirmed values are specified in Section 7.5 of the SLVSE57C datasheet.

Does the TPS259525DSGR support quick output discharge, and how is it implemented?

Yes, the TPS259525DSGR supports quick output discharge via its dedicated QOD pin (Pin 6). When the EN pin is deasserted, an internal ~19-Ω switch connects OUT to GND, discharging output capacitance without external components. This differs from FLT-only variants like TPS259521DSGR. The QOD function is confirmed in the Pin Configuration table and Figure 45 of the SLVSE57C datasheet.

How is the current limit set on the TPS259525DSGR, and what is its accuracy?

The TPS259525DSGR current limit is set by an external resistor (R_ILM) from the ILM pin to GND. With R_ILM = 487 Ω, the typical limit is 4.17 A (±7.5%). The ILM pin also provides a proportional analog voltage (276 µA/A) for real-time load current monitoring. These specifications are guaranteed across –40°C to +125°C and documented in Section 7.5 Electrical Characteristics.

What package type and thermal characteristics does the TPS259525DSGR use?

The TPS259525DSGR uses an 8-pin WSON package (2.00 mm × 2.00 mm) with exposed thermal pad. Its junction-to-board thermal resistance (R_θJB) is 28.3°C/W, and maximum junction temperature is 157°C before thermal shutdown activates. The exposed pad must be soldered to a GND plane for optimal thermal performance - details are in Section 7.4 Thermal Information of SLVSE57C.

Is the TPS259525DSGR certified for safety standards, and which ones?

Yes, the TPS259525DSGR is UL 2367 Recognized (File E169910) and IEC 62368-1 Certified. It also passes the Safe During Single Point Failure test per IEC 62368-1, including ILM pin open/short detection. These certifications validate its use in end-equipment requiring regulatory compliance - stated in the Features section and Section 7.5 of the SLVSE57C datasheet.