Texas Instruments TPS2001DDGKR

Overview

TPS2001DDGKR from Texas Instruments is a 2-A current-limited, single-channel power-distribution switch with N-channel MOSFET output stage, ±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 and is used in USB 2.0/3.0 port protection circuits where short-circuit and heavy capacitive load immunity are required.

For engineers reviewing the TPS2001DDGKR datasheet, TPS2001DDGKR pinout, TPS2001DDGKR application, or TPS2001DDGKR equivalent, key selection criteria include guaranteed 2-A continuous current capability, deglitched active-low FLT reporting, 470-Ω typical output discharge resistance, UVLO threshold at 3.75 V (±0.25 V), and VSSOP-8 package compatibility with space-constrained USB hub PCB layouts.

Technical Context

The TPS2001DDGKR integrates an internal charge pump to drive the N-channel MOSFET gate above the source, enabling low R_DS(on) (66 mΩ typ, DBV; 72 mΩ typ, DGK) without external components. Its constant-current limiting operates independently of input voltage and load impedance, delivering predictable 2.9 A (±0.55 A) fault current under short-circuit conditions.

Functional modes are strictly binary: enabled (EN ≥ 1.45 V) or disabled (EN ≤ 0.7 V), with no intermediate states. Fault detection combines overcurrent (via current-sense amplifier) and overtemperature (135°C trip, 20°C hysteresis), both debounced by a 9-ms deglitch timer on the open-drain FLT pin.

Key Specifications

Pinout & Package

VSSOP-8 (DGK) package: 3.00 mm × 3.00 mm body, 0.65 mm pitch, exposed thermal pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2001DDGKR, TPS2041BDBVR offers smaller footprint but sacrifices 25% current capacity and critical output discharge functionality, while TPS2061DR trades performance for legacy compatibility and higher thermal resistance-neither matches the 2-A/2-µs/470-Ω triad essential for modern USB 3.0 port protection.

Availability

TPS2001DDGKR is available at Aetrix Electronics and suitable for USB 3.0 port protection, set-top box peripheral interfaces, and high-definition TV media ports requiring stable component supply, long-term lifecycle support, and certified safety compliance.

Supply support for TPS2001DDGKR 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 specializing in analog and embedded processing technologies, with leadership in power management ICs for computing, consumer, and industrial markets.

The TPS2001D product line delivers highly integrated, safety-certified power switches optimized for USB-compliant hot-swap protection in space-constrained, high-reliability host systems.

FAQ

What is the maximum continuous output current rating for the TPS2001DDGKR?

The TPS2001DDGKR is rated for 2 A continuous output current across its full operating temperature range (–40°C to 85°C ambient). This rating is validated under 4.5–5.5 V input conditions with proper PCB thermal design per TI's recommended layout guidelines. The device enters constant-current limiting at 2.9 A (±0.55 A) during overload, ensuring predictable fault behavior without exceeding safe junction temperatures in the TPS2001DDGKR.

Does the TPS2001DDGKR provide reverse current blocking when disabled?

Yes, the TPS2001DDGKR blocks reverse current flow from OUT to IN when disabled, with reverse leakage current specified at ≤1 µA (max) at 25°C and ≤5 µA (max) over –40°C to 85°C. This feature protects upstream 5-V supplies from backfeeding when downstream loads remain powered, a critical requirement for USB OTG and multi-rail systems using the TPS2001DDGKR.

What is the purpose of the FLT pin on the TPS2001DDGKR, and how is it used?

The FLT pin on the TPS2001DDGKR is an active-low, open-drain fault indicator that asserts during overcurrent or overtemperature events. It features a 9-ms deglitch timer to suppress false triggers from transient surges. System designers must connect an external pull-up resistor (typically 10 kΩ to 3.3 V or 5 V) to generate a logic-high signal when no fault is present. The FLT pin clears immediately upon disabling the TPS2001DDGKR, enabling precise fault isolation in multi-port USB hubs using the TPS2001DDGKR.

Can the TPS2001DDGKR be used with a 3.3-V enable signal?

Yes, the TPS2001DDGKR supports 3.3-V logic enable signals. Its EN input has a guaranteed VIH(min) of 1.45 V (DGK package) and 1.8 V (DBV package), making it compatible with standard 3.3-V CMOS/TTL outputs. The device draws only 60–90 µA when enabled and <1 µA when disabled, minimizing control-line loading. For reliable operation with 3.3-V microcontrollers, ensure the EN trace is routed away from noisy switching nodes to maintain noise margin in the TPS2001DDGKR.

How does the output discharge function work in the TPS2001DDGKR?

The TPS2001DDGKR integrates a 470-Ω (typical) pulldown resistor between OUT and GND that activates automatically when the device is disabled or in undervoltage lockout. This safely discharges stored energy in the 150-µF USB output capacitor within ~10 ms, preventing floating voltages that could damage connected peripherals during hot-plug events. The discharge resistance increases gradually as VIN falls below 2 V, ensuring controlled decay without excessive current draw-the core safety mechanism of the TPS2001DDGKR.