Texas Instruments TPS2065CDBVT

Overview

TPS2065CDBVT from Texas Instruments is a 1-A current-limited power-distribution switch in SOT-23-5 package, featuring ±20% accurate fixed current limit (1.3–1.8 A), 2 µs overcurrent response, reverse current blocking, and built-in soft-start. It operates from 4.5 V to 5.5 V input and is designed for USB port protection in laptops and desktops where short circuits and heavy capacitive loads occur.

For engineers reviewing the TPS2065CDBVT datasheet, TPS2065CDBVT pinout, TPS2065CDBVT application, or TPS2065CDBVT equivalent, this device delivers predictable fault current limiting, deglitched fault reporting, and thermal shutdown at 135°C - critical for robust 5-V rail protection in high-density consumer electronics.

Technical Context

The TPS2065CDBVT integrates an N-channel MOSFET power switch with internal charge pump for gate drive, enabling low R_DS(on) (96–110 mΩ at 25°C) without external components. Its constant-current limiting architecture maintains output current at IOS during overload, independent of load impedance.

It features undervoltage lockout (3.5–4.0 V rising threshold), active-low open-drain FLT pin with 6–12 ms deglitch, and TTL/CMOS-compatible enable input. Thermal shutdown engages at 135°C (in current limit) with 20°C hysteresis, ensuring self-recovery after fault removal.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, thermally enhanced with GND-connected lead frame; requires minimum 0.1 µF ceramic capacitor from IN to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2065CDBVT, TPS2065CDBVR offers identical performance in volume packaging, while TPS2065C-2DBVT trades output discharge capability for marginally lower leakage - making the original TPS2065CDBVT optimal for USB-compliant hot-swap and fault-isolation requirements.

Availability

TPS2065CDBVT is available at Aetrix Electronics and suitable for USB port protection, laptop docking stations, and set-top box power distribution requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS2065CDBVT 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-switch solutions.

The TPS20xxC family was designed specifically for USB and consumer electronics power distribution, emphasizing fast fault response, reverse blocking, and compatibility with legacy TI switch footprints.

FAQ

What is the maximum continuous output current rating for the TPS2065CDBVT?

The TPS2065CDBVT is rated for 1 A continuous output current. Its current-limit threshold (IOS) is specified from 1.3 A to 1.8 A at 25°C, with ±20% accuracy across temperature and process variation. This ensures reliable short-circuit protection without exceeding safe SOA limits in the SOT-23-5 package.

Does the TPS2065CDBVT include output discharge functionality?

Yes, the TPS2065CDBVT includes output discharge (RPD ≈ 400–600 Ω) that actively pulls the OUT pin to GND when the device is disabled. This feature meets USB suspend timing requirements by rapidly discharging load capacitance - distinguishing it from the TPS2065C-2DBVT variant, which omits this function.

What is the purpose of the FLT pin on the TPS2065CDBVT?

The FLT pin on the TPS2065CDBVT is an active-low, open-drain fault indicator that asserts during overcurrent or overtemperature events. With 6–12 ms deglitching, it rejects noise while reliably signaling faults to microcontrollers or system supervisors - enabling firmware-driven port disable, logging, or user alerts without false triggers.

Can the TPS2065CDBVT operate from a 3.3-V input supply?

No, the TPS2065CDBVT requires a minimum 4.5-V input supply and has a 3.5–4.0 V undervoltage lockout (UVLO) threshold. Operation below 4.5 V violates recommended conditions and may result in incomplete turn-on, elevated R_DS(on), or erratic enable behavior. For 3.3-V systems, consider TI's TPS229xx series instead.

How does the TPS2065CDBVT handle thermal overload conditions?

When thermal overload occurs, the TPS2065CDBVT shuts down at 135°C (minimum) while in current limit, then auto-restarts once junction temperature cools by 20°C. This thermal cycling protects the IC and PCB during sustained shorts, and is complemented by fast 2 µs overcurrent response to minimize energy dissipation before thermal shutdown engages.