Texas Instruments TPS2042ADRG4

Overview

TPS2042ADRG4 from Texas Instruments is a dual-channel, 80-mΩ high-side N-channel MOSFET power-distribution switch designed for USB and peripheral power management. It delivers 500 mA continuous current per channel, operates from 2.7 V to 5.5 V, features independent thermal/short-circuit protection with active-low OC1/OC2 outputs, and supports CMOS/TTL-compatible enable inputs. It is used in USB hubs, docking stations, and embedded systems requiring robust overcurrent handling.

For engineers reviewing the TPS2042ADRG4 datasheet, TPS2042ADRG4 pinout, TPS2042ADRG4 application, or TPS2042ADRG4 equivalent, key selection criteria include per-channel current limiting (500 mA), dual independent enable control, SOIC-8 package compatibility, thermal shutdown recovery behavior, and undervoltage lockout threshold (~2 V).

Technical Context

The TPS2042ADRG4 integrates two independent high-side power switches with internal charge-pump gate drivers enabling operation down to 2.7 V input. Each channel includes dedicated current-sense FETs for precise overload detection and constant-current limiting at ~0.9 A short-circuit threshold, with automatic thermal shutdown at ~140°C junction temperature and ~20°C hysteresis.

Its enable logic is active-low (TPS204x series), with separate EN1 and EN2 inputs controlling IN→OUT1 and IN→OUT2 paths respectively. The OC1 and OC2 open-drain outputs assert low during overcurrent or overtemperature events, providing fault signaling without requiring external pull-ups for basic monitoring.

Key Specifications

Pinout & Package

TPS2042ADRG4 is housed in an 8-pin SOIC (D) package with exposed pad (not electrically connected). Pin assignments are validated per TI SLVS247 datasheet Figure 2 and Terminal Functions table for TPS2042A.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2042ADRG4, TPS2052ADRG4 offers identical performance with reversed enable polarity-ideal for logic-aligned control-while AP22652WM-7 trades dual-channel integration and diagnostic capability for higher single-channel current and smaller footprint, requiring two units to match functionality.

Availability

TPS2042ADRG4 is available at Aetrix Electronics and suitable for USB peripheral power management, industrial I/O modules, and embedded docking stations requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TPS2042ADRG4 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 technologies, with decades of expertise in high-reliability power IC design.

The TPS204x family was engineered specifically for USB-compliant, current-limited power distribution in host and hub applications-emphasizing fault resilience, low quiescent current, and seamless integration with 3.3 V/5 V system rails.

FAQ

What is the maximum continuous current per channel for the TPS2042ADRG4?

The TPS2042ADRG4 supports 500 mA continuous current per channel under recommended operating conditions (T_A ≤ 85°C, V_IN = 2.7–5.5 V). This rating is validated across the full ambient temperature range and accounts for thermal derating in the SOIC-8 package. Exceeding this current may trigger current-limit mode or thermal shutdown depending on load duration and PCB thermal design.

Does the TPS2042ADRG4 have built-in overtemperature protection?

Yes, the TPS2042ADRG4 incorporates independent thermal sense circuitry per channel. When junction temperature reaches approximately 140°C due to sustained overload or short circuit, the affected channel shuts off automatically while the other remains operational. Recovery occurs after cooling by ~20°C, enabling auto-retry behavior until the fault is removed - a key safety feature confirmed in the SLVS247 datasheet Section 8.

Can the TPS2042ADRG4 be used with a 3.3 V input supply?

Yes, the TPS2042ADRG4 operates reliably from 2.7 V to 5.5 V, including 3.3 V nominal supplies. At 3.3 V input, its R_DS(on) increases to 125 mΩ (typical, 25°C), resulting in ≤625 mV dropout at 500 mA - well within most 3.3 V system tolerances. The internal charge pump ensures full gate drive even at minimum input, as verified in the Electrical Characteristics table (Page 10).

What is the function of the OC1 and OC2 pins on the TPS2042ADRG4?

The OC1 and OC2 pins on the TPS2042ADRG4 are open-drain, active-low outputs that assert low during overcurrent or overtemperature events on their respective channels. Each pin can sink ≥10 mA and requires an external pull-up resistor (typically 10 kΩ to V_CC) to interface with MCU interrupts or status LEDs. They provide real-time, hardware-level fault visibility without software polling overhead - a core diagnostic feature of the TPS2042ADRG4.

Is the TPS2042ADRG4 pin-compatible with the TPS2052ADRG4?

Yes, the TPS2042ADRG4 and TPS2052ADRG4 share identical SOIC-8 pinout and electrical specifications, differing only in enable logic polarity: TPS2042ADRG4 uses active-low EN1/EN2, while TPS2052ADRG4 uses active-high. No PCB layout change is required for substitution - only firmware or logic-level signal inversion is needed to maintain functional equivalence.