Texas Instruments TPS259531DSGT

Overview

TPS259531DSGT from Texas Instruments is a 2.7 V to 18 V, 4-A eFuse IC with 34-mΩ on-resistance, 5.7-V fast overvoltage clamp (5 µs response), auto-retry thermal shutdown, and active-high enable with adjustable UVLO. It protects power rails in adapter-powered systems and SSDs by limiting inrush, clamping surges, and monitoring load current via the ILM pin.

For engineers reviewing the TPS259531DSGT datasheet, TPS259531DSGT pinout, TPS259531DSGT application, or TPS259531DSGT equivalent, key selection criteria include its 5.7-V fixed OV clamp threshold, auto-retry fault recovery mode, ±7.5% current limit accuracy across 0.5–4 A, WSON-8 (2 mm × 2 mm) thermal performance (R_θJA = 65.6°C/W), and IEC 62368-1/UL 2367 safety certification.

Technical Context

The TPS259531DSGT integrates a low-R_ON N-channel MOSFET with precision current sensing, internal charge pump gate drive, and analog control logic for independent UVP, OVC, OTP, and current-limit functions. Its dVdt pin accepts an external capacitor to set output slew rate, while the FLT pin provides open-drain fault indication for overvoltage, overcurrent, or thermal events.

Unlike latch-off variants (e.g., TPS259530DSGT), the TPS259531DSGT implements auto-retry thermal shutdown with a 93-ms reset interval and uses EN/UVLO (not EN/OVLO) for active-high enable with resistor-divider programmable undervoltage lockout - confirmed by Device Comparison Table and Pin Functions section.

Key Specifications

Pinout & Package

TPS259531DSGT is housed in an 8-pin WSON package (2.00 mm × 2.00 mm body, exposed thermal pad). The package supports high-power dissipation with R_θJB = 28.3°C/W and requires GND connection of the exposed pad for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS259530DSGT, the TPS259531DSGT enables autonomous recovery from thermal faults, while TPS259631DSGT offers higher current capacity and lower conduction loss at the cost of larger size and non-pin-compatible packaging.

Availability

TPS259531DSGT is available at Aetrix Electronics and suitable for hot-swap systems, SSD/HDD power management, and industrial control panels requiring stable component supply, long-term lifecycle support, and certified safety compliance.

Supply support for TPS259531DSGT 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 and embedded processing solutions with emphasis on reliability, precision, and safety certification.

The TPS2595xx family is designed for robust circuit protection in power-distribution networks, targeting applications needing integrated overvoltage, overcurrent, and thermal safeguards with minimal external components.

FAQ

What is the overvoltage clamp threshold and response time for TPS259531DSGT?

The TPS259531DSGT features a fixed 5.7-V (typical) overvoltage clamp with a 5-µs typical response time when output current exceeds 4 A. This value is factory-programmed and does not require external components. The clamp activates only on the OUT node and holds voltage within 5.2–5.7 V during overvoltage events, protecting downstream circuitry without latching off.

How does the TPS259531DSGT implement auto-retry thermal shutdown?

The TPS259531DSGT enters thermal shutdown at 157°C junction temperature and automatically retries after 93 ms once the junction cools below 152°C (5°C hysteresis). This behavior is intrinsic to the device's internal logic and requires no external circuitry. Unlike latch-off variants, it resumes normal operation without manual intervention or power cycling.

Can the current limit of TPS259531DSGT be adjusted, and what is its accuracy?

Yes, the TPS259531DSGT current limit is set by an external resistor (R_ILM) from the ILM pin to GND, supporting 0.5–4 A range. With R_ILM = 487 Ω, the limit is 4.17 A (typical) with ±7.5% accuracy over –40°C to 125°C. Accuracy is guaranteed by design and characterized per Electrical Characteristics table; no calibration is required.

What package type and thermal characteristics does TPS259531DSGT use?

The TPS259531DSGT uses an 8-pin WSON package (2.00 mm × 2.00 mm body) with an exposed thermal pad. Its thermal metrics include R_θJA = 65.6°C/W (junction-to-ambient) and R_θJB = 28.3°C/W (junction-to-board), enabling 4-A continuous operation with proper PCB copper area. The exposed pad must be soldered to a GND plane for optimal thermal performance.

Is TPS259531DSGT certified for safety-critical applications?

Yes, the TPS259531DSGT is IEC 62368-1 certified and UL 2367 recognized (File E169910). It passes single-point-failure testing per IEC 62368-1, including ILM pin open/short detection and safe fault behavior. These certifications validate its suitability for end products requiring regulatory approval in consumer, industrial, and medical auxiliary power domains.