Texas Instruments TPS259541DSGR

Overview

TPS259541DSGR from Texas Instruments is a 2.7 V to 18 V, 4-A eFuse IC with 34-mΩ R_ON, 13.7-V fast overvoltage clamp (5 µs response), auto-retry thermal shutdown, and active-high enable with adjustable UVLO. It protects power rails in industrial systems and SSDs against overcurrent, overvoltage, and inrush surges.

For engineers reviewing the TPS259541DSGR datasheet, TPS259541DSGR pinout, TPS259541DSGR application, or TPS259541DSGR equivalent, key selection criteria include output voltage clamp threshold (13.7 V typ), current limit accuracy (±7.5%), dV/dt slew rate control, ILM-based load current monitoring, and WSON-8 thermal performance (R_θJA = 65.6°C/W).

Technical Context

The TPS259541DSGR implements a precision current-limiting FET switch with integrated protection logic, including a dedicated overvoltage clamp circuit that activates within 5 µs at 13.7 V (typ) without external components. Its EN/UVLO pin supports resistor-divider–based input undervoltage lockout, while FLT provides open-drain fault signaling.

It features dual-function ILM pin for both setting 0.5–4 A current limit via external resistor (R_ILM = 487 Ω → 4.17 A typ) and monitoring load current with 276 µA/A gain. Thermal shutdown triggers at 157°C with 5°C hysteresis and auto-retry recovery every 93 ms.

Key Specifications

Pinout & Package

TPS259541DSGR uses an 8-pin WSON package (2.00 mm × 2.00 mm) with exposed thermal pad (GND). The package supports high-power density layout and efficient heat dissipation (R_θJB = 28.3°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS259541DSGR, TPS259540DSGR offers identical protection thresholds but removes auto-retry behavior, while TPS259621RTER trades ILM functionality for higher current and lower R_ON in a larger package-making TPS259541DSGR optimal for space-constrained, telemetry-aware 4-A applications.

Availability

TPS259541DSGR is available at Aetrix Electronics and suitable for industrial systems, SSD/HDD power management, and adapter-powered consumer electronics requiring stable component supply, long-term lifecycle support, and certified safety compliance.

Supply support for TPS259541DSGR 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 and embedded processing technologies, with decades of expertise in power management ICs.

The TPS2595xx family is designed for robust circuit protection in high-reliability power distribution networks-delivering integrated overvoltage, overcurrent, and thermal safeguards in compact WSON packages.

FAQ

What is the overvoltage clamp threshold and response time of the TPS259541DSGR?

The TPS259541DSGR features a fixed 13.7-V (typical) overvoltage clamp with a guaranteed response time of 5 µs under 4-A load conditions. This threshold is factory-programmed and requires no external components-enabling immediate protection against input surges without design overhead. The clamp holds output voltage within 13.0–14.1 V during sustained overvoltage events.

How does the TPS259541DSGR implement current limiting and monitoring?

The TPS259541DSGR sets output current limit via an external resistor (R_ILM) connected from the ILM pin to GND; with R_ILM = 487 Ω, it delivers 4.17 A (typ) with ±7.5% accuracy. Simultaneously, the same ILM pin outputs a 276 µA/A (typ) analog current sense signal-allowing real-time load monitoring without additional components.

Does the TPS259541DSGR support adjustable undervoltage lockout?

Yes-the TPS259541DSGR includes an active-high EN/UVLO pin with a 1.2-V (typ) internal threshold. By connecting a resistor divider from IN to GND with its midpoint at EN/UVLO, designers can program custom undervoltage lockout levels-for example, a 100-kΩ/22-kΩ divider sets UVLO at ~2.7 V on the input rail.

What thermal protection behavior does the TPS259541DSGR provide?

The TPS259541DSGR incorporates thermal shutdown that activates at 157°C junction temperature and includes 5°C hysteresis. Upon triggering, it enters auto-retry mode with a 93-ms recovery interval-attempting re-enabling once temperature falls below 152°C. This prevents system lockup during transient overloads while maintaining safety compliance.

Is the TPS259541DSGR certified for safety standards?

Yes-the TPS259541DSGR is UL 2367 recognized (File E169910) and IEC 62368-1 certified. It also passes single-point-failure testing per IEC 62368-1, including detection of ILM pin open/short conditions-ensuring safe operation even under fault conditions required for Class I/II end equipment.