Texas Instruments TPS2065DDBVT

Overview

TPS2065DDBVT from Texas Instruments is a 1-A current-limited, single-channel power-distribution switch in SOT-23-5 package, featuring ±20% accurate fixed current limit, 2 µs overcurrent response, reverse current blocking, and integrated output discharge. It operates from 4.5 V to 5.5 V input and is designed for USB port protection in laptops and desktops.

For engineers reviewing the TPS2065DDBVT datasheet, TPS2065DDBVT pinout, TPS2065DDBVT application, or TPS2065DDBVT equivalent, key selection criteria include guaranteed 1-A continuous output current, 96–154 mΩ R_DS(on) across temperature, active-low deglitched FLT reporting, soft-start control, and UL/CB safety certification - all critical for robust 5-V rail protection in high-capacitance load environments.

Technical Context

The TPS2065DDBVT integrates an N-channel MOSFET power switch with internal charge pump gate drive, enabling low R_DS(on) while maintaining logic-level enable compatibility. Its constant-current limiting activates at 1.2–1.9 A (–40°C to 125°C), with thermal shutdown at 135°C (min) and 20°C hysteresis.

Functional behavior includes undervoltage lockout (UVLO) with 3.5–4.0 V rising threshold and 0.14 V hysteresis, active-low open-drain FLT with 6–12 ms deglitch, and output discharge via 300–1200 Ω pulldown resistor depending on VIN/VOUT conditions.

Key Specifications

Pinout & Package

SOT-23-5 package (2.90 mm × 1.60 mm body size) with exposed pad not electrically connected; thermally optimized for PCB copper pour on GND plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2051BDBVR and AP2171SG-13, the TPS2065DDBVT delivers superior fault response speed, guaranteed output discharge, and safety certification - making it the preferred choice for USB-compliant, safety-certified 5-V distribution where reliability and regulatory compliance are mandatory.

Availability

TPS2065DDBVT is available at Aetrix Electronics and suitable for USB port protection, laptop docking stations, set-top box peripheral hubs, and industrial HMI panels requiring stable component supply and long-term production continuity.

Supply support for TPS2065DDBVT 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TPS2065DDBVT belongs to TI's current-limited power-distribution switch family, engineered specifically for USB-compliant 5-V rail protection in high-capacitance, short-circuit-prone environments like portable computing and consumer entertainment systems.

FAQ

What is the maximum continuous output current of the TPS2065DDBVT?

The TPS2065DDBVT is rated for 1 A continuous output current across its full operating temperature range (–40°C to 85°C ambient). Electrical characteristics confirm this rating is maintained with R_DS(on) up to 154 mΩ and current limit thresholds between 1.2 A and 1.9 A, ensuring reliable performance under worst-case thermal and voltage conditions. The TPS2065DDBVT achieves this using an N-channel MOSFET with internal charge pump drive.

Does the TPS2065DDBVT provide reverse current blocking?

Yes, the TPS2065DDBVT provides reverse current blocking when disabled or in undervoltage lockout (UVLO). This feature prevents current flow from OUT to IN, eliminating the need for external blocking diodes in applications such as battery-backed systems or multi-rail power domains. Reverse leakage is specified at ≤20 µA at 5.5 V OUT and 0 V IN over temperature, confirming effective isolation in the off state. The TPS2065DDBVT implements this via its internal N-MOSFET architecture and gate control logic.

What is the purpose of the FLT pin on the TPS2065DDBVT?

The FLT pin on the TPS2065DDBVT is an active-low, open-drain fault indicator that asserts during overcurrent or overtemperature events. It features a 6–12 ms deglitch timer on both assertion and deassertion to prevent false triggering from transient inrush or noise. When asserted, FLT sinks up to 5 mA and requires an external pull-up resistor. Disabling the TPS2065DDBVT or entering UVLO places FLT in high-impedance state. This allows host microcontrollers to monitor fault status without additional level-shifting circuitry.

Can the TPS2065DDBVT be used in USB 3.0 applications?

Yes, the TPS2065DDBVT is explicitly designed for USB port protection including USB 3.0. Its 1-A continuous rating meets USB 3.0 downstream port requirements, and its 2 µs overcurrent response time, 120 µF minimum output capacitance support, and UL/CB certification (E169910) align with USB-IF compliance expectations. The TPS2065DDBVT also provides output discharge to meet hot-plug sequencing requirements and reverse blocking to prevent backfeed into upstream controllers - all validated in TI's USB reference schematics.

What is the recommended input capacitance for the TPS2065DDBVT?

Texas Instruments recommends placing a minimum 0.1 µF ceramic capacitor between IN and GND, located as close as possible to the TPS2065DDBVT pins for local noise decoupling. For robustness against input voltage overshoot - especially in systems with long input traces or cables - TI further recommends 1–22 µF additional ceramic capacitance. This mitigates transients caused by inductive kickback during short-circuit turnoff and ensures the TPS2065DDBVT remains within its 6-V absolute maximum rating. The TPS2065DDBVT's fast 2-µs response makes input capacitance critical for sustained fault isolation.