Texas Instruments TPS2042ADR

Overview

TPS2042ADR from Texas Instruments is a dual-channel, current-limited, high-side N-channel MOSFET power-distribution switch designed for USB and peripheral power management. It features 80-mΩ on-resistance per channel, 500 mA continuous output current per switch, independent thermal/short-circuit protection with open-drain OC1/OC2 outputs, and operates from 2.7 V to 5.5 V input supply - ideal for portable USB hubs and embedded host controllers.

For engineers reviewing the TPS2042ADR datasheet, TPS2042ADR pinout, TPS2042ADR application, or TPS2042ADR equivalent, key selection criteria include per-channel enable control, 2.5-ms typical rise time, undervoltage lockout at ~2 V, <10 µA standby current, and SOIC-8 (D) package compatibility with standard PCB layouts.

Technical Context

The TPS2042ADR integrates two independent 80-mΩ N-channel high-side switches with internal charge-pump gate drive enabling operation down to 2.7 V. Each channel includes dedicated CMOS/TTL-compatible enable inputs (active-low for TPS204x series) and open-drain overcurrent outputs (OC1, OC2) that assert low during current-limit or thermal shutdown events.

Its protection architecture combines fast current limiting (typical short-circuit current of 0.9 A at 25°C), dual-threshold thermal sensing (~140°C trip, ~120°C hysteresis), and undervoltage lockout (~2 V threshold). The device remains latched off until valid input voltage is restored and thermal recovery completes.

Key Specifications

Pinout & Package

TPS2042ADR is housed in an 8-pin SOIC (D) package with exposed pad for thermal enhancement. Pin numbering follows standard D-package top-view orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2042ADR, TPS2052ADR offers identical performance with reversed enable polarity - simplifying design reuse across TI families - while AP2152MPG-13 trades integration and diagnostics for smaller footprint and higher current per channel, but increases BOM count and removes fault visibility.

Availability

TPS2042ADR is available at Aetrix Electronics and suitable for USB peripheral power management, industrial HMI subsystems, and portable medical diagnostics requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS2042ADR 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 personal electronics markets.

The TPS204x family was engineered specifically for USB-compliant power distribution - emphasizing per-port protection, low quiescent current, and robust hot-plug tolerance in compact SOIC packages.

FAQ

What is the maximum continuous current rating per channel for the TPS2042ADR?

The TPS2042ADR supports 500 mA continuous output current per channel under recommended operating conditions (T_A ≤ 85°C, proper PCB thermal relief). This rating is maintained across the full 2.7 V to 5.5 V input range and is enforced by internal current limiting that activates at approximately 0.9 A during short-circuit events. Derating is required above 85°C ambient per the dissipation rating table.

Does the TPS2042ADR support independent fault reporting for each channel?

Yes, the TPS2042ADR provides independent open-drain overcurrent outputs: OC1 monitors channel 1 (OUT1) and OC2 monitors channel 2 (OUT2). Both outputs assert low during current-limit or thermal shutdown events on their respective channels. They can be wire-OR'd to a single MCU interrupt line or monitored separately for precise fault localization - a key feature distinguishing it from single-output alternatives.

What is the enable logic polarity for the TPS2042ADR?

The TPS2042ADR uses active-low enable inputs: EN1 and EN2 must be driven low to turn on OUT1 and OUT2, respectively. This is consistent with the TPS204x series designation. In contrast, the pin-compatible TPS2052ADR uses active-high enables. The datasheet specifies V_IL ≤ 0.4 V (2.7–4.5 V V_IN) and V_IH ≥ 2.0 V for reliable logic recognition.

Can the TPS2042ADR operate from a 3.3 V supply rail?

Yes, the TPS2042ADR is fully specified to operate from 2.7 V to 5.5 V, including 3.3 V nominal rails. At 3.3 V input, its R_DS(on) increases to 90–125 mΩ (25°C), resulting in ≤62.5 mV dropout at 500 mA. The internal charge pump ensures sufficient gate drive for full enhancement, and rise/fall times remain within specification - making it suitable for mixed-voltage embedded systems.

Is thermal shutdown on the TPS2042ADR channel-specific or global?

Thermal shutdown on the TPS2042ADR is channel-specific. Its dual-threshold thermal sense circuit independently monitors each power switch. If one channel overheats (e.g., due to sustained overload), only that channel shuts down while the other continues normal operation. Recovery occurs automatically after junction temperature drops ~20°C below the ~140°C trip point - preserving system functionality where possible.