Texas Instruments TPS259630DDAT

Overview

TPS259630DDAT from Texas Instruments is a 2.7–19 V, 0.125–2-A eFuse IC with 89-mΩ on-resistance, adjustable overvoltage lockout (OVLO), latch-off thermal shutdown, and accurate current monitoring via ILM pin. It protects downstream circuits in energy meters, IP network cameras, and UL 60335-1 appliance power supplies against overcurrent, overvoltage, inrush, and thermal faults.

For engineers reviewing the TPS259630DDAT datasheet, TPS259630DDAT pinout, TPS259630DDAT application, or TPS259630DDAT equivalent, key selection considerations include its SOIC-8 package with exposed thermal pad, 1.3-μs OVLO response, ±10.4% current limit accuracy across 0.125–2 A, and compatibility with adjustable slew rate control via dVdt capacitor.

Technical Context

The TPS259630DDAT implements a precision current-limiting FET gate controller with integrated voltage comparators for UVLO (EN/UVLO pin) and user-configurable OVLO (OVLO pin). Its internal charge pump enables robust 89-mΩ Ron operation across 2.7–19 V input while maintaining <259 µA quiescent current.

It features dual-function ILM pin for both setting current limit (via RILM resistor) and monitoring load current (653–684 µA/A gain), plus open-drain FLT pin asserting within 1.3 µs of OVLO fault. Thermal shutdown latches off at 157°C with 11.5°C hysteresis-no auto-retry.

Key Specifications

Pinout & Package

TPS259630DDAT uses an 8-pin SOIC package with exposed thermal pad (DDA suffix), requiring soldering of the pad to PCB ground plane for optimal thermal performance (R_θJA = 52.7°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS259630DDAT, TPS259631DDAT offers identical OVLO flexibility but trades latch-off reliability for auto-retry convenience, while TPS25942ARVCR sacrifices OVLO programmability for lower resistance and compact packaging-neither is pin-compatible.

Availability

TPS259630DDAT is available at Aetrix Electronics and suitable for energy metering, IP network camera power management, and UL 60335-1 appliance control boards requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS259630DDAT 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 TPS2596xx family was designed specifically for robust, programmable circuit protection in safety-critical industrial and consumer appliances-emphasizing adjustable thresholds, fast fault response, and thermal resilience.

FAQ

What is the maximum input voltage rating for the TPS259630DDAT?

The TPS259630DDAT has an absolute maximum input voltage of 21 V on the IN pin. Its recommended operating range is 2.7 V to 19 V. Exceeding 21 V risks permanent damage. The device also includes internal overvoltage lockout (OVLO) that can be configured via the OVLO pin to disconnect the output before reaching this absolute limit-ensuring downstream circuit safety even during input transients.

How does the TPS259630DDAT implement adjustable overvoltage protection?

The TPS259630DDAT uses the OVLO pin (Pin 8) to accept a resistor divider from the IN rail. When the divided voltage exceeds 1.2 V (rising threshold), the device latches off the internal FET within 1.3 µs. The falling threshold is 1.1 V, providing 95-mV hysteresis. This architecture allows precise, user-defined overvoltage cutoff-unlike fixed-clamp variants-and is confirmed in the device's Electrical Characteristics table and Figure 46 of the datasheet.

Does the TPS259630DDAT support auto-retry after thermal shutdown?

No, the TPS259630DDAT implements latch-off thermal shutdown: once junction temperature reaches 157°C, the device disables the FET and holds it off until power is cycled or EN/UVLO is toggled. This behavior is specific to the "30" variant (TPS259630DDAT); the "31" variant (TPS259631DDAT) provides auto-retry. The latch-off mode enhances safety in unattended appliances like refrigerators or washing machines where uncontrolled restart could pose risk.

What is the function of the ILM pin on the TPS259630DDAT?

The ILM pin (Pin 7) serves two critical functions: (1) setting output current limit via an external resistor to GND (RILM), supporting 0.125–2 A range; and (2) providing a voltage output proportional to load current (653–684 µA/A gain) for real-time monitoring. Its dual role eliminates separate current-sense amplifiers and simplifies design-verified in Section 7.5 Electrical Characteristics and Figure 24 of the TPS2596 datasheet.

Can the TPS259630DDAT be used without an external dVdt capacitor?

Yes-the dVdt pin (Pin 2) may be left floating to achieve the fastest possible output slew rate (e.g., 75.1 V/ms at 12 V input). However, omitting the capacitor removes inrush current control, potentially causing excessive stress on downstream capacitors or triggering upstream current limits. For applications requiring controlled power-up (e.g., energy meters with large bulk capacitance), a 2200-pF capacitor is commonly used-confirmed in Figure 29 and Section 7.7 Switching Characteristics.