Texas Instruments TPS2065QDGNRQ1

Overview

TPS2065QDGNRQ1 from Texas Instruments is an automotive-qualified, single-channel high-side power-distribution switch featuring a 70-mΩ N-channel MOSFET, 1-A continuous output current capability, thermal and short-circuit protection, and 2.7 V to 5.5 V input voltage operation. It serves as a protected load switch in automotive infotainment power rails and USB port power management.

For engineers reviewing the TPS2065QDGNRQ1 datasheet, TPS2065QDGNRQ1 pinout, TPS2065QDGNRQ1 application, or TPS2065QDGNRQ1 equivalent, key selection criteria include its active-high enable logic, 1.1–2.1 A programmable current limit range, 0.6-ms typical rise time, UL recognition (E166910), and –40°C to 125°C ambient operating range.

Technical Context

The TPS2065QDGNRQ1 implements a charge-pump–driven high-side N-channel MOSFET with integrated current-sense FET for accurate overcurrent detection and constant-current limiting. Its internal thermal shutdown circuit activates at ~140°C with 10°C hysteresis and automatic recovery.

It features deglitched open-drain OC reporting (10-ms timeout), undervoltage lockout (~2 V threshold), built-in soft-start, and <1 μA standby supply current. The device operates without external components for gate drive, enabling robust hot-swap capability in 5-V USB and automotive subsystems.

Key Specifications

Pinout & Package

TPS2065QDGNRQ1 is housed in an 8-pin MSOP-PowerPAD (DGN) package with 3.00 mm × 3.00 mm body size and exposed thermal pad internally connected to GND for enhanced thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2065QDGNRQ1, TPS2061QDGNRQ1 offers reduced current capacity in the same footprint for cost-sensitive sub-500 mA loads, while TPS2557DRCT provides adjustable limiting but sacrifices automotive compliance and requires redesign for thermal and mechanical integration.

Availability

TPS2065QDGNRQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, USB host port protection, and body control module power distribution requiring stable component supply across extended temperature and long product lifecycles.

Supply support for TPS2065QDGNRQ1 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 automotive-grade power management ICs with decades of automotive qualification expertise.

The TPS206x-Q1 product line was designed specifically for AEC-Q100–compliant, high-reliability power distribution in automotive subsystems where short-circuit resilience, thermal robustness, and hot-swap capability are mandatory.

FAQ

What is the enable logic polarity of the TPS2065QDGNRQ1?

The TPS2065QDGNRQ1 uses active-high enable logic: applying a logic high voltage (≥2 V) to EN (Pin 4) turns the internal high-side MOSFET ON, while a logic low (≤0.8 V) disables the switch and reduces supply current to ≤1 μA. This differs from the TPS2062-Q1 family, which uses active-low enable.

Does the TPS2065QDGNRQ1 support bidirectional current flow?

No - the TPS2065QDGNRQ1 is a unidirectional high-side switch. Its N-channel MOSFET architecture blocks reverse current from OUT to IN when disabled, preventing backfeed. It does not support true bidirectional operation like some ideal diode controllers.

What is the purpose of the deglitched OC output in the TPS2065QDGNRQ1?

TPS2065QDGNRQ1's OC pin is an open-drain output that asserts low during overcurrent or thermal shutdown events. Its 10-ms deglitch circuit filters transient inrush spikes - such as those caused by plugging in a USB device - ensuring only sustained faults trigger fault reporting and avoiding false system resets.

Can the TPS2065QDGNRQ1 operate from a 3.3-V supply?

Yes - the TPS2065QDGNRQ1 operates across 2.7 V to 5.5 V. At 3.3 V, its rDS(ON) increases to ≤150 mΩ (vs. 135 mΩ at 5 V), resulting in higher conduction loss, but it maintains full functionality including current limiting, thermal protection, and OC reporting.

How is thermal management implemented in the TPS2065QDGNRQ1?

The TPS2065QDGNRQ1 integrates a junction temperature sensor that triggers automatic shutdown at ~140°C. After cooling by ~10°C, it recovers autonomously. Its MSOP-PowerPAD package achieves RθJB = 38.8°C/W when the exposed thermal pad is soldered to a 1-in² PCB ground plane, enabling reliable 1-A operation at 125°C ambient.