Texas Instruments TPS2022DG4

Overview

TPS2022DG4 from Texas Instruments is a 1.5-A rated, 8-pin SOIC N-channel high-side power distribution switch with integrated current limiting, thermal shutdown, and undervoltage lockout. It operates from 2.7 V to 5.5 V input, features 33 mΩ typical R_DS(on) at 5 V, 6.1 ms typical rise time, and active-low overcurrent (OC) flag output. It is used in hot-plug USB peripherals, industrial I/O modules, and embedded system power rail control.

For engineers reviewing the TPS2022DG4 datasheet, TPS2022DG4 pinout, TPS2022DG4 application, or TPS2022DG4 equivalent, key selection criteria include its 1.5-A short-circuit current limit, SOIC-8 package compatibility, logic-level enable input, UL listing (E169910), and absence of drain-source back-gate diode - critical for bidirectional isolation in shared-bus systems.

Technical Context

The TPS2022DG4 implements an internal charge pump to drive the N-channel MOSFET gate above the source, enabling full enhancement down to 2.7 V input while maintaining low R_DS(on). Its current-limit circuit uses a sense FET-not a shunt resistor-minimizing insertion loss and avoiding parasitic heating in the power path.

Thermal protection activates at ~140°C junction temperature with ~20°C hysteresis, causing automatic cycling until fault removal. The OC pin is open-drain and asserts low during overcurrent or overtemperature events; it remains latched low until both conditions clear, supporting external fault logging without additional supervision circuitry.

Key Specifications

Pinout & Package

TPS2022DG4 is housed in an 8-pin SOIC (D) package with standard 1.27 mm pitch, RoHS-compliant, and surface-mount compatible. Thermal resistance θ_JA = 172°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2022DG4, TPS2022DR offers identical performance in a production-optimized packaging format, while TPS2052BDR trades UL certification and latched fault reporting for higher current rating and auto-retry functionality - making it suitable for less safety-critical, higher-dynamic-load applications.

Availability

TPS2022DG4 is available at Aetrix Electronics and suitable for USB peripheral power switching, industrial I/O module protection, and embedded system rail sequencing requiring stable component supply, long-term lifecycle support, and certified safety compliance.

Supply support for TPS2022DG4 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-switching solutions.

The TPS202x family-including TPS2022DG4-is designed specifically for robust hot-plug and power-rail protection in industrial, computing, and communications equipment where capacitive loads and short circuits are common.

FAQ

What is the maximum continuous output current rating for the TPS2022DG4?

The TPS2022DG4 is rated for a typical short-circuit current limit of 1.5 A at 25°C, as specified in Table 1 of the datasheet. This is not a programmable threshold but an inherent device characteristic determined by internal current-sense FET design. Continuous operation at this level is thermally feasible in SOIC-8 only with proper PCB copper area and ambient conditions ≤85°C.

Does the TPS2022DG4 require external components for basic operation?

Yes - a 0.1 µF ceramic bypass capacitor between IN and GND is mandatory per TI's application guidance. Additionally, a pull-up resistor (typically 10 kΩ) on the OC pin is required for proper fault signaling. No external gate-drive components or current-sense resistors are needed, as the charge pump and sense FET are fully integrated within the TPS2022DG4.

How does the TPS2022DG4 behave during thermal shutdown?

When junction temperature reaches ~140°C, the TPS2022DG4 disables the power switch and enters thermal shutdown. After cooling by ~20°C, it automatically resumes operation - cycling on/off until the fault is removed. During each on-cycle, the TPS2022DG4 enforces its 1.5-A current limit, preventing thermal runaway while maintaining visibility via the OC pin.

Is the TPS2022DG4 pin-compatible with other members of the TPS202x family?

Yes - all TPS202x variants (TPS2020–TPS2024) share identical SOIC-8 and PDIP-8 pinouts, including TPS2022DG4. The only functional difference is the current-limit threshold: TPS2022DG4 is fixed at 1.5 A, whereas TPS2021DG4 is 0.9 A and TPS2023DG4 is 2.2 A. Electrical and mechanical interchangeability is confirmed in the "Terminal Functions" and "Available Options" sections of the datasheet.

What safety certifications does the TPS2022DG4 hold?

The TPS2022DG4 is UL listed under file E169910, compliant with UL 60950-1 for information technology equipment. This certification covers dielectric strength, flammability, and construction requirements - enabling direct use in end products targeting UL/CSA/IEC safety approvals without additional isolation barriers or derating.