Texas Instruments TPS259570DSGR

Overview

TPS259570DSGR from Texas Instruments is a 2.7 V to 18 V, 4-A eFuse IC with 34 mΩ on-resistance, latch-off thermal shutdown, active-high enable, and no overvoltage clamp - designed for robust input protection in adapter-powered industrial systems and SSDs. It delivers ±7.5% current limit accuracy, 5 µs short-circuit response, and operates from –40°C to +125°C.

For engineers reviewing the TPS259570DSGR datasheet, TPS259570DSGR pinout, TPS259570DSGR application, or TPS259570DSGR equivalent, key selection criteria include its absence of OV clamp (vs. 3.8/5.7/13.7-V clamped variants), fixed latch-off fault behavior, adjustable current limiting via RILM, dV/dt-controlled slew rate, and WSON-8 package compatibility with space-constrained hot-swap designs.

Technical Context

The TPS259570DSGR implements an integrated N-channel MOSFET power switch with precision current sensing, analog ILM-based load monitoring, and digitally controlled fault latching. Its EN/UVLO pin supports resistor-divider–based undervoltage lockout (1.1–1.27 V threshold), while internal charge-pump gate drive ensures stable R_ON across temperature and input voltage.

Unlike TPS259573 (programmable OVLO) or TPS2595x5 (QOD support), this variant omits overvoltage clamping circuitry and quick discharge functionality - simplifying design where upstream surge suppression is handled externally and persistent fault isolation is required.

Key Specifications

Pinout & Package

TPS259570DSGR uses an 8-pin WSON package (2.00 mm × 2.00 mm) with exposed thermal pad (GND-connected). The package supports high-density routing and efficient heat dissipation via PCB copper area under the pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS259570DSGR, TPS259571DSGR trades fault persistence for self-recovery, while TPS259531DSGR adds integrated OV clamp at the cost of higher quiescent current and reduced flexibility in OV threshold selection.

Availability

TPS259570DSGR is available at Aetrix Electronics and suitable for industrial control modules, SSD power rails, and adapter-powered white goods requiring stable component supply, long-term lifecycle support, and full traceability.

Supply support for TPS259570DSGR 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 storage applications - delivering integrated current limiting, monitoring, and fault signaling in a single WSON package.

FAQ

What is the overvoltage protection capability of the TPS259570DSGR?

The TPS259570DSGR does not include internal overvoltage clamping circuitry - unlike TPS25952x/3x/4x variants. It relies on external protection (e.g., TVS diodes or upstream regulators) for overvoltage events. This design choice reduces complexity and cost where OV risk is managed at the system level, and allows full use of the 2.7–18 V input range without clamp-induced voltage droop.

How do I configure the current limit for TPS259570DSGR?

Set the current limit for TPS259570DSGR using a single resistor (RILM) from the ILM pin to GND. For example, 487 Ω yields 4.17 A typical limit (±7.5%). The relationship is inverse-linear: lower resistance = higher current. RILM values from 487 Ω to 4420 Ω support 0.5–4 A ranges, with ILM pin voltage providing proportional current monitoring.

Does TPS259570DSGR support quick output discharge (QOD)?

No, TPS259570DSGR does not support quick output discharge. QOD functionality is exclusive to TPS2595x5 variants (e.g., TPS259525DSGR), which feature a dedicated QOD pin. TPS259570DSGR's OUT pin remains floating after disable; external bleed resistors or FETs are required for rapid discharge in applications needing fast rail collapse.

What is the thermal performance of TPS259570DSGR in a standard PCB layout?

In a standard 2-layer PCB with 1-in² 2-oz copper under the exposed thermal pad, TPS259570DSGR achieves a junction-to-board thermal resistance (R_θJB) of 28.3°C/W. At 4 A and 12 V input, power dissipation is ~544 mW, resulting in ≈15.4°C rise above board temperature - well within the –40°C to +125°C operating range without forced airflow.

Can TPS259570DSGR be used with a 3.3-V input supply?

Yes, TPS259570DSGR supports 3.3-V input operation - its minimum input voltage is 2.7 V. At 3.3 V, R_ON increases slightly (≤40 mΩ typ), and quiescent current remains ≤250 µA. The EN/UVLO pin can be tied directly to IN for simple enable control, or configured with a resistor divider for custom undervoltage lockout below 3.3 V.