Texas Instruments TPS2065DGN-1

Overview

TPS2065DGN-1 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, and integrated thermal/short-circuit protection. It operates from 2.7 V to 5.5 V input and delivers controlled turn-on (0.6-ms typical rise time) with output discharge, making it suitable for USB host/port power management in embedded systems.

For engineers reviewing the TPS2065DGN-1 datasheet, TPS2065DGN-1 pinout, TPS2065DGN-1 application, or TPS2065DGN-1 equivalent, key selection considerations include its active-high enable logic, 1.1–1.9 A current-limit range, undervoltage lockout (2.0–2.5 V), deglitched OC fault reporting, and MSOP-8 (DGN-8) package compatibility with space-constrained USB and industrial power-rail designs.

Technical Context

The TPS2065DGN-1 integrates an internal charge pump to drive the high-side N-channel MOSFET gate, enabling full enhancement down to 2.7 V input without external components. Its current-limit circuit uses a sense-FET architecture-eliminating series resistance penalties-while maintaining ±10% accuracy across temperature (1.1 A min / 1.9 A max at TJ = 25°C).

Thermal shutdown activates at ~135°C junction temperature with 10°C hysteresis, and the undervoltage lockout ensures reliable power-up sequencing by disabling the switch below ~2.0 V. The open-drain OC pin asserts low after a 4–15 ms deglitch window during overcurrent or thermal events, preventing false triggers from inrush transients.

Key Specifications

Pinout & Package

TPS2065DGN-1 is housed in an 8-pin MSOP (DGN-8) package, 3.0 mm × 3.0 mm × 1.0 mm, with exposed thermal pad for enhanced power dissipation (θJA = 17.1 °C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2051BDGNR and TPS2061DR, the TPS2065DGN-1 offers optimal balance of 1-A capacity, low thermal resistance, and compact MSOP-8 footprint-making it the preferred choice for space-constrained, high-density USB host and industrial power-rail applications requiring full-spec margin.

Availability

TPS2065DGN-1 is available at Aetrix Electronics and suitable for USB host design, industrial I/O power switching, embedded hot-swap systems, and medical peripheral power control requiring stable component supply and long-term lifecycle support.

Supply support for TPS2065DGN-1 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 power-switch ICs.

The TPS206x-1 family was designed specifically for USB-compliant power distribution and industrial hot-swap applications-emphasizing accurate current limiting, thermal resilience, and seamless integration into compact, high-density PCB layouts.

FAQ

What is the maximum continuous output current rating for the TPS2065DGN-1?

The TPS2065DGN-1 is rated for 1 A continuous output current under recommended operating conditions (TA ≤ 25°C, VI(IN) = 5.5 V). Derating applies at higher ambient temperatures-e.g., 684 mW power dissipation limit at 85°C ambient in DGN-8 package-requiring thermal design validation per TI's SLVS714A datasheet Figure 18 and Dissipation Rating Table.

Does the TPS2065DGN-1 support 3.3 V input operation?

Yes, the TPS2065DGN-1 fully supports 3.3 V input operation across its entire specified range (2.7 V to 5.5 V). At 3.3 V, rDS(on) remains ≤135 mΩ (typical 70 mΩ at 5 V), and rise time increases slightly to ~0.8 ms-still within USB inrush compliance margins. The internal charge pump ensures reliable gate drive without external components.

How does the OC pin on the TPS2065DGN-1 behave during a short-circuit event?

During a short-circuit, the TPS2065DGN-1 enters constant-current mode and asserts the OC pin low after a 4–15 ms deglitch timeout. OC remains low until the fault clears and the device recovers-either thermally (if shutdown occurred) or electrically (if current drops below trip threshold). OC is not asserted during power-up inrush due to built-in deglitching.

Can the TPS2065DGN-1 be used in battery-powered applications?

Yes-the TPS2065DGN-1 draws only 0.5–1 µA supply current when disabled (high-level EN), and 43–70 µA when enabled, making it suitable for battery-backed systems. Its 2.7 V minimum input allows direct use with single-cell Li-ion (3.0–4.2 V) or two-cell alkaline (2.4–3.2 V) supplies, provided thermal limits are observed at reduced voltage.

Is there an internal discharge path on the TPS2065DGN-1 output?

Yes, the TPS2065DGN-1 includes an internal 100 Ω discharge path between OUT and GND when disabled. This safely dissipates stored charge from output capacitors-critical for USB hot-unplug compliance and preventing backfeed into upstream sources. Discharge current is limited to ~8 mA at 5 V, ensuring controlled energy removal without excessive stress.