Texas Instruments TPS259573DSGT

Overview

TPS259573DSGT from Texas Instruments is a programmable overvoltage-lockout eFuse IC designed for input-side power path protection in 2.7 V to 18 V systems. It delivers 4-A continuous current with 34-mΩ typical R_ON, features auto-retry thermal shutdown, active-low EN/OVLO control, and 5-µs overvoltage clamp response-enabling robust hot-swap protection in industrial SSDs and adapter-powered equipment.

For engineers reviewing the TPS259573DSGT datasheet, TPS259573DSGT pinout, TPS259573DSGT application, or TPS259573DSGT equivalent, key selection criteria include its user-configurable OVLO threshold via resistor divider on EN/OVLO, ±7.5% current limit accuracy across 0.5–4 A range, adjustable dV/dt slew rate, and IEC 62368-1 certification for safety-critical power management.

Technical Context

The TPS259573DSGT implements an integrated N-channel MOSFET with precision current sensing and fast analog overvoltage detection circuitry. Its EN/OVLO pin accepts a resistor divider to set a custom overvoltage lockout threshold (e.g., 15 V), triggering immediate FET turn-off within 3 µs when exceeded. Unlike fixed-clamp variants, it lacks internal OVC circuitry but retains full current limiting, load monitoring (ILM), and fault reporting (FLT).

It operates across –40°C to +125°C with thermal shutdown at 157°C (5°C hysteresis) and auto-retry recovery. The device uses no external components for OVLO activation, relies on R_ILM for current limit setting (487 Ω → 4.17 A), and supports output slew rate control via capacitor on dVdt pin-making it suitable for inrush-sensitive loads like multi-function printers and digital TVs.

Key Specifications

Pinout & Package

TPS259573DSGT is housed in an 8-pin WSON package (2.00 mm × 2.00 mm) with exposed thermal pad. The package supports high-power density layouts and requires GND connection of the exposed pad for optimal thermal performance (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 TPS259573DSGT, TPS259531DSGT offers simpler implementation for fixed-rail 5-V protection but sacrifices OVLO flexibility, while TPS259571DSGT reduces BOM count by omitting OVLO circuitry entirely-making TPS259573DSGT the only choice when user-defined overvoltage cutoff is mandatory.

Availability

TPS259573DSGT is available at Aetrix Electronics and suitable for industrial SSDs, adapter-powered set-top boxes, multi-function printers, and digital TV power subsystems requiring stable component supply, long-term lifecycle support, and certified safety compliance.

Supply support for TPS259573DSGT 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 was engineered specifically for high-reliability hot-swap and power-path protection in industrial, computing, and consumer electronics-emphasizing programmability, safety certification, and minimal external component count.

FAQ

What is the overvoltage lockout mechanism of the TPS259573DSGT?

The TPS259573DSGT uses an active-low EN/OVLO pin that accepts a resistor divider from VIN to GND. When the divided voltage exceeds 1.2 V (typ), the device disables the internal FET within 3 µs. This allows users to set custom thresholds-e.g., a 10-kΩ/2.2-kΩ divider on a 15-V rail yields ~2.7 V at EN/OVLO, triggering lockout at ~13.2 V input. The TPS259573DSGT does not include internal overvoltage clamping circuitry.

How do I configure the current limit for the TPS259573DSGT?

Set the current limit by connecting a resistor (R_ILM) from the ILM pin to GND. For example, 487 Ω yields 4.17 A (typ), 1780 Ω yields 1.17 A (typ), and 4420 Ω yields 0.49 A (typ). The TPS259573DSGT's current limit accuracy is ±7.5% over temperature and supply voltage, and the ILM pin simultaneously provides a 276 µA/A monitor signal for real-time load current readback.

Does the TPS259573DSGT support quick output discharge (QOD)?

No, the TPS259573DSGT does not support quick output discharge. QOD functionality is exclusive to the TPS2595x5 variants (e.g., TPS259525DSGT, TPS259535DSGT), which feature a dedicated QOD pin. The TPS259573DSGT uses the same 8-pin WSON footprint as other TPS2595xx devices but assigns pin 6 to FLT (fault indicator), not QOD-so external discharge circuitry is required if rapid output discharge is needed.

What thermal performance can I expect from the TPS259573DSGT in a 4-A application?

At 4 A and 12 V input, the TPS259573DSGT dissipates approximately 544 mW (I²R = 4² × 0.034 Ω). With its R_θJB of 28.3°C/W and proper PCB copper area under the exposed pad, junction temperature rise above ambient is ~15.4°C. Combined with its 157°C thermal shutdown threshold and 5°C hysteresis, the TPS259573DSGT sustains continuous 4-A operation up to +110°C ambient in well-designed layouts.

Is the TPS259573DSGT certified for safety-critical applications?

Yes, the TPS259573DSGT is IEC 62368-1 certified and UL 2367 recognized (File E169910). It includes built-in single-point-failure detection for ILM pin open/short conditions and meets requirements for safe operation during fault events. These certifications validate its use in end equipment requiring compliance with modern audio/video and information technology safety standards.