Texas Instruments TPS259571DSGT

Overview

TPS259571DSGT from Texas Instruments is a 2.7 V to 18 V, 4-A eFuse IC with 34 mΩ on-resistance, auto-retry thermal shutdown, and no overvoltage clamp - designed for robust input protection in adapter-powered systems and industrial power rails. It features adjustable current limiting (0.5–4 A), load current monitoring via ILM pin, and slew-rate control via external capacitor.

For engineers reviewing the TPS259571DSGT datasheet, TPS259571DSGT pinout, TPS259571DSGT application, or TPS259571DSGT equivalent, key selection criteria include its auto-retry fault response mode, absence of integrated OVC clamping, active-high enable with UVLO, and WSON-8 package compatibility with space-constrained hot-swap implementations.

Technical Context

The TPS259571DSGT implements an integrated N-channel MOSFET switch with precision current sensing, real-time thermal monitoring, and digitally controlled fault recovery logic. Its EN/UVLO pin accepts resistor-divided input voltage to set programmable undervoltage lockout thresholds (1.13–1.27 V rising), while the ILM pin provides dual-function current limit setting (via RILM) and analog load current monitoring (276 µA/A gain).

Unlike clamp-equipped variants (e.g., TPS259531DSGT), this part omits internal overvoltage protection circuitry - requiring external TVS or regulator coordination for overvoltage events. Fault handling defaults to auto-retry mode with 93-ms reset interval after thermal shutdown at 157°C junction temperature.

Key Specifications

Pinout & Package

TPS259571DSGT uses an 8-pin WSON package (2.00 mm × 2.00 mm) with exposed thermal pad (GND-connected) for enhanced power dissipation. The package is RoHS-compliant and optimized for automated PCB assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS259571DSGT, TPS259570DSGT offers stricter fault containment via latch-off, while TPS259531DSGT adds essential overvoltage clamping - making the latter preferable in environments with unpredictable input surges, whereas TPS259571DSGT excels in thermally managed, well-regulated adapter-fed systems.

Availability

TPS259571DSGT is available at Aetrix Electronics and suitable for adapter-powered systems, industrial I/O modules, and SSD power management requiring stable component supply, long-term lifecycle support, and full traceability.

Supply support for TPS259571DSGT 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 expertise in high-reliability protection ICs.

The TPS2595xx family was engineered for robust, space-efficient circuit protection in hot-swap, industrial, and consumer power rails - emphasizing configurability, safety certification, and minimal external component count.

FAQ

What is the overvoltage protection capability of the TPS259571DSGT?

The TPS259571DSGT does not include internal overvoltage clamp circuitry - unlike TPS259531DSGT (5.7-V clamp) or TPS259541DSGT (13.7-V clamp). It relies on external protection (e.g., TVS diodes or upstream regulators) for overvoltage events. This design choice reduces silicon area and cost while maintaining flexibility for system-specific surge mitigation strategies. Always verify external protection sufficiency per IEC 61000-4-5 requirements.

How do I configure the current limit for the TPS259571DSGT?

Set the TPS259571DSGT current limit using a single resistor (RILM) from the ILM pin to GND. For example, 487 Ω yields 4.17 A (±7.5%), 1780 Ω yields 1.17 A, and 4420 Ω yields 0.49 A. The ILM pin also outputs a proportional voltage (276 µA/A) for real-time current monitoring. Avoid leaving ILM floating - it must be terminated to GND via RILM for proper operation.

Does the TPS259571DSGT support quick output discharge (QOD)?

No, the TPS259571DSGT does not support quick output discharge. QOD functionality is exclusive to TPS2595x5 variants (e.g., TPS259525DSGT, TPS259535DSGT), which feature a dedicated QOD pin tied to OUT. The TPS259571DSGT uses standard FLT signaling and lacks QOD circuitry - output discharge depends solely on external load and capacitance. Add an external MOSFET discharge path if rapid turn-off decay is required.

What is the thermal performance of the TPS259571DSGT in its WSON-8 package?

The TPS259571DSGT in WSON-8 (2.0 mm × 2.0 mm) achieves RθJB = 28.3°C/W to the PCB and RθJA = 65.6°C/W in typical JEDEC high-K board conditions. With 4 A load and 34 mΩ RON, power dissipation is ~544 mW - resulting in ~15.4°C rise above ambient under ideal layout. Use the exposed GND pad and ≥2 cm² inner-layer copper pour to maintain junction temperature below 125°C in continuous operation.

Can the TPS259571DSGT be used in automotive applications?

The TPS259571DSGT is specified for –40°C to +125°C operation and carries IEC 62368-1 and UL 2367 safety certifications, but it is not AEC-Q100 qualified. While functionally capable in 12-V automotive subsystems (e.g., infotainment USB hubs), it lacks automotive-grade qualification, extended temperature validation, and zero-defect screening. For production automotive use, consider TI's AEC-Q100-qualified alternatives like TPS25942 or TPS4H160.