Texas Instruments TPS259620DDAR

Overview

TPS259620DDAR from Texas Instruments is a 2.7–19 V, 89-mΩ eFuse IC with fast overvoltage clamp (3.8 V/5.7 V/13.8 V pin-selectable), ±10.4% current limit accuracy (0.125–2 A range), and integrated load current monitor (ILM). It protects downstream circuits in energy meters and UL 60335-1–compliant appliance power supplies.

For engineers reviewing the TPS259620DDAR datasheet, TPS259620DDAR pinout, TPS259620DDAR application, or TPS259620DDAR equivalent, key selection factors include its 5-μs overvoltage clamp response, SOIC-8 thermal-pad package, latch-off fault behavior, and single-resistor programmable current limit.

Technical Context

The TPS259620DDAR implements a fixed-threshold overvoltage clamp using the OVCSEL pin to select 3.8 V, 5.7 V, or 13.8 V output clamping levels without external components. Its internal FET features 89-mΩ typical R_ON and supports 2-A continuous current with thermal shutdown at 157°C.

It integrates an accurate current-sense amplifier (656 µA/A nominal gain) on the ILM pin for real-time load monitoring and uses a dV/dt pin with external capacitor to control output slew rate. Fault indication is provided via open-drain FLT pin with 11.5-Ω internal pull-down.

Key Specifications

Pinout & Package

TPS259620DDAR is housed in an 8-pin SOIC package with exposed thermal pad (4.91 mm × 3.9 mm), requiring solder connection 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 applications.

Compared with TPS259620DDAR, TPS259621DDAR offers identical protection features but auto-retries after fault clearance, while TPS259421RVCR trades fixed clamp simplicity for higher current and programmable OVLO-making it preferable for compact, high-power applications demanding flexibility.

Availability

TPS259620DDAR is available at Aetrix Electronics and suitable for energy meters, UL 60335-1 appliance power supplies, and IP network cameras requiring stable component supply and long-term industrial availability.

Supply support for TPS259620DDAR 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, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The TPS2596xx family was designed specifically as highly integrated eFuses for robust circuit protection in safety-critical power rails-emphasizing fast overvoltage response, accurate current monitoring, and simplified layout with minimal external components.

FAQ

What is the overvoltage clamp response time of the TPS259620DDAR?

The TPS259620DDAR delivers a 5-μs typical overvoltage clamp response time when an input overvoltage event exceeds the selected OVCSEL threshold (3.8 V, 5.7 V, or 13.8 V). This rapid reaction protects downstream 3.3-V or 5-V logic from damage during transient surges, and is confirmed across –40°C to +125°C operating temperature.

How is the current limit set on the TPS259620DDAR?

The current limit on the TPS259620DDAR is set by connecting a single external resistor between the ILM pin and GND. Resistance values from 453 Ω to 7.87 kΩ configure the limit from 2 A down to 0.125 A. The TPS259620DDAR datasheet specifies ±10.4% maximum error across the full range, tightening to ±5.5% at 1-A setting.

Does the TPS259620DDAR support adjustable output slew rate control?

Yes, the TPS259620DDAR supports adjustable output slew rate control via the dVdt pin. Connecting a capacitor from dVdt to GND slows the output voltage ramp during turn-on, directly limiting inrush current. With CdVdt = 3300 pF, the rising slew rate drops to 13.6 V/ms at 12-V input-enabling safe charging of large output capacitors without tripping the current limit.

What fault behavior does the TPS259620DDAR exhibit after overcurrent detection?

The TPS259620DDAR exhibits latch-off fault behavior after overcurrent detection. Once triggered, the internal FET remains off until the EN/UVLO pin is cycled low-then-high or input power is fully removed and reapplied. This prevents unsafe automatic restart during persistent faults-a critical requirement for UL 60335-1 appliance applications.

Is the thermal pad of the TPS259620DDAR electrically connected internally?

Yes, the exposed thermal pad of the TPS259620DDAR is internally connected to GND and must be soldered to the PCB ground plane. This connection is essential for achieving the specified 52.7°C/W junction-to-ambient thermal resistance; omitting it degrades thermal performance to 119.8°C/W and risks thermal shutdown under sustained 2-A load.