Texas Instruments 905X0205100

Overview

905X0205100 from Texas Instruments is a 2-A current-limited power-distribution switch in the TPS20xxC family, designed for 5-V USB and peripheral power rail protection. It features ±20% accurate fixed current limiting, 2-µs overcurrent response, reverse current blocking, built-in soft start, and operates from –40°C to 85°C ambient temperature.

For engineers reviewing the 905X0205100 datasheet, 905X0205100 pinout, 905X0205100 application, or 905X0205100 equivalent, this device is selected for high-reliability 5-V load switching where short-circuit resilience, fast fault detection, and controlled turn-on/turn-off timing are critical - especially in USB ports, set-top boxes, and digital TVs.

Technical Context

The 905X0205100 integrates an N-channel MOSFET power switch with internal charge pump gate drive, enabling low R_DS(on) (72–84 mΩ at 25°C) while maintaining 5-V input compatibility. Its constant-current limit mode ensures predictable fault current under all overload conditions, independent of load impedance.

It implements deglitched active-low open-drain FLT reporting (6–12 ms deglitch), undervoltage lockout (3.5–4.0 V rising threshold), and thermal shutdown with 135°C activation and 20°C hysteresis. The enable input supports TTL/CMOS logic levels and reduces supply current to ≤1 µA when disabled.

Key Specifications

Pinout & Package

905X0205100 is packaged in an 8-pin MSOP-PowerPAD (DGN) with exposed thermal pad internally connected to GND. This package provides low thermal resistance (R_θJA = 66.5–61.3°C/W) and supports high-current operation with proper PCB copper pour.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2001C and TPS2069C, the 905X0205100 delivers higher continuous current (2 A vs. 1.5 A), maintains identical thermal and fault-response characteristics, and supports flexible enable polarity - making it optimal for high-power USB-C accessories and industrial 5-V distribution where headroom and reliability are prioritized.

Availability

905X0205100 is available at Aetrix Electronics and suitable for USB port protection, digital TV power management, and set-top box peripheral distribution requiring stable component supply, long-term lifecycle support, and certified safety compliance.

Supply support for 905X0205100 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer applications.

The TPS20xxC family was engineered specifically for robust 5-V power distribution in USB-compliant systems, emphasizing short-circuit resilience, precise current limiting, and seamless integration with host controller power management.

FAQ

What is the maximum continuous output current supported by the 905X0205100?

The 905X0205100 supports a maximum continuous output current of 2 A. This rating is validated across the operating junction temperature range (–40°C to 125°C) and accounts for thermal derating in the DGN package. At 25°C ambient with adequate PCB copper, it sustains full 2-A load without thermal shutdown.

Does the 905X0205100 include reverse current blocking functionality?

Yes, the 905X0205100 provides inherent reverse current blocking when disabled. Its N-channel MOSFET architecture and integrated control circuitry prevent current flow from OUT to IN, eliminating the need for external blocking diodes in applications like USB OTG or multi-rail systems where backfeed could disrupt upstream supplies.

What is the purpose of the FLT pin on the 905X0205100, and how should it be interfaced?

The FLT pin on the 905X0205100 is an active-low, open-drain fault indicator that asserts during overcurrent or overtemperature events. It requires an external pull-up resistor (typically 10 kΩ to 5 V or 3.3 V). The 6–12 ms deglitch filter ensures noise immunity, and asserting FLT clears immediately upon disabling the device via EN/EN.

Can the 905X0205100 operate with a 3.3-V enable signal?

Yes, the 905X0205100 accepts 3.3-V logic on its EN/EN pin. Its input threshold is specified as V_IL ≤ 0.7 V (low) and V_IH ≥ 2.0 V (high), ensuring reliable recognition of 3.3-V CMOS/TTL signals without level translation. This allows direct interfacing with most modern microcontrollers and FPGAs.

Is the 905X0205100 UL-certified, and what does that mean for end-equipment design?

Yes, the 905X0205100 is UL Listed with CB File No. E169910. This certification confirms compliance with UL 60950-1/IEC 60950-1 safety standards for information technology equipment. For end-equipment designers, it reduces qualification effort, supports faster regulatory approval, and validates isolation, creepage, and thermal safety margins in final products.