Texas Instruments TPS2061DRG4

Overview

TPS2061DRG4 from Texas Instruments is a single-channel, current-limited, high-side power-distribution switch featuring a 70 mΩ N-channel MOSFET, 1 A continuous output current, thermal and short-circuit protection, accurate current limiting (1.1 A min / 1.9 A max), and operation from 2.7 V to 5.5 V input supply - used for controlled power sequencing in USB peripherals, hot-swap interfaces, and point-of-load protection circuits.

For engineers reviewing the TPS2061DRG4 datasheet, TPS2061DRG4 pinout, TPS2061DRG4 application, or TPS2061DRG4 equivalent, key selection criteria include its precise overcurrent threshold tolerance, low standby current (≤1 μA), built-in soft-start, undervoltage lockout (UVLO) with 75 mV hysteresis, and deglitched OC fault reporting - all critical for robust load management in space-constrained industrial and embedded systems.

Technical Context

The TPS2061DRG4 integrates an internal charge pump enabling gate drive above the source voltage, allowing full enhancement of the high-side N-MOSFET down to 2.7 V input - eliminating external bias components. Its current-limit architecture operates in constant-current mode during overload, maintaining safe output current while reducing output voltage proportionally to load impedance.

Thermal shutdown activates at 135°C junction temperature with 10°C hysteresis and automatic recovery at 125°C; UVLO disables the switch below 2.0 V (rising) and re-enables above 2.6 V (falling); the open-drain OC pin asserts low after 4–15 ms deglitch delay upon sustained overcurrent detection.

Key Specifications

Pinout & Package

TPS2061DRG4 is packaged in an 8-pin SOIC (D package) with PowerPAD™ thermally enhanced leadframe. The exposed thermal pad must be soldered to a GND-connected copper area for optimal thermal performance (R_θJA = 119.3°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side power switch applications.

Compared with TPS2051BDR and AP22651WG-7, the TPS2061DRG4 uniquely combines 1 A current capability, deglitched OC reporting, thermal shutdown, and UVLO in a single SOIC-8 package - making it the most functionally complete solution for safety-critical, diagnostic-aware power distribution.

Availability

TPS2061DRG4 is available at Aetrix Electronics and suitable for USB peripheral protection, industrial sensor node power gating, and hot-swap board insertion requiring stable component supply and long-term production continuity.

Supply support for TPS2061DRG4 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 ICs, with decades of expertise in high-reliability power-switching solutions.

The TPS206x family was designed specifically for robust, current-limited power distribution in USB, industrial, and embedded systems - emphasizing fault resilience, low quiescent current, and seamless integration with host controllers.

FAQ

What is the enable polarity of the TPS2061DRG4?

The TPS2061DRG4 features an active-low enable input (EN). Driving EN low enables the power switch and allows current flow from IN to OUT; driving EN high disables the switch and reduces supply current to ≤1 μA. This matches TTL/CMOS logic thresholds and simplifies interface with microcontrollers lacking open-drain outputs.

Does the TPS2061DRG4 provide reverse current blocking?

Yes, the TPS2061DRG4 provides inherent reverse current blocking due to its high-side N-channel MOSFET configuration. When disabled, the body diode is reverse-biased, preventing current flow from OUT to IN - critical for protecting upstream supplies during load faults or hot-plug events.

How does the TPS2061DRG4 respond to a short-circuit event?

Upon detecting sustained overcurrent exceeding the 1.1–1.9 A limit, the TPS2061DRG4 enters constant-current mode, clamping output current while reducing output voltage. If dissipation causes junction temperature to reach 135°C, thermal shutdown activates and holds OFF until cooling to 125°C - all without requiring external components.

Can the TPS2061DRG4 operate from a 3.3 V supply?

Yes, the TPS2061DRG4 operates across 2.7 V to 5.5 V, fully supporting 3.3 V nominal rails. At 3.3 V input, r_DS(on) remains ≤135 mΩ (D/DGN packages), and current limit stays within spec - enabling use in mixed-voltage systems such as FPGA I/O banks or low-voltage MCU peripherals.

Is the PowerPAD™ thermal pad required to be connected to ground?

Yes, the exposed PowerPAD™ on the TPS2061DRG4 D-package must be soldered to a PCB copper area connected to the GND net. It is internally tied to the GND pin and serves as the primary thermal conduction path - omitting this connection degrades R_θJA by >40°C/W and risks thermal shutdown under 1 A load.