Texas Instruments TPS2034DG4

Overview

TPS2034DG4 from Texas Instruments is a 3-A rated, N-channel MOSFET high-side power distribution switch in an 8-pin SOIC package. It operates from 2.7 V to 5.5 V input, features 33 mΩ on-resistance at 5 V/25°C, integrated thermal and short-circuit protection, 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 TPS2034DG4 datasheet, TPS2034DG4 pinout, TPS2034DG4 application, or TPS2034DG4 equivalent, key selection criteria include its 3-A current-limit threshold, SOIC-8 thermal performance (R_θJA = 172°C/W), logic-level enable compatibility, controlled 6.1-ms rise time, and absence of drain-source back-gate diode - critical for bidirectional isolation in shared-bus systems.

Technical Context

The TPS2034DG4 implements an internal charge pump to drive the N-channel MOSFET gate above the source, enabling full enhancement down to 2.7 V input without external components. Its driver circuit actively shapes rise/fall times (6.1 ms typical rise, 3.4 ms typical fall) to suppress inrush current and EMI during hot-swap events.

Current limiting is achieved via a sense FET architecture-not a shunt resistor-minimizing series resistance impact. Overcurrent detection pulls the open-drain OC pin low; thermal shutdown activates at ~140°C junction temperature with ~20°C hysteresis, enabling automatic recovery after cooling.

Key Specifications

Pinout & Package

TPS2034DG4 is housed in an 8-pin SOIC (D) package with standard 1.27 mm pitch and exposed pad not present. Pin functions are validated per TI SLVS190C datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2034DR, TPS2034DG4 offers tube packaging flexibility for low-volume design-in; versus TPS2051BDBVR, it delivers 2× current capacity, 35% lower r_DS(on), and full fault visibility - essential for mission-critical hot-swap systems.

Availability

TPS2034DG4 is available at Aetrix Electronics and suitable for USB peripheral power control, industrial I/O module protection, and embedded system rail sequencing requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS2034DG4 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 over 50 years of innovation in high-reliability power solutions.

The TPS203x family was designed specifically for hot-plug and high-capacitance load applications, delivering controlled power ramping, integrated fault protection, and robust SOIC packaging for industrial and computing infrastructure.

FAQ

What is the maximum continuous output current rating for the TPS2034DG4?

The TPS2034DG4 is rated for a typical short-circuit output current of 3 A at 25°C, with a guaranteed minimum of 2.2 A and maximum of 3.8 A across temperature and voltage. This current limit defines the threshold at which the device enters constant-current mode during overload, protecting downstream circuitry while maintaining regulated power delivery.

Does the TPS2034DG4 require external components for gate drive or voltage boosting?

No, the TPS2034DG4 integrates a charge pump that generates the required gate-drive voltage internally. It operates down to 2.7 V input without external capacitors or boost circuitry, simplifying layout and reducing BOM count compared to discrete high-side switch implementations.

How does the overcurrent (OC) pin function on the TPS2034DG4?

The OC pin on the TPS2034DG4 is an open-drain output that pulls low during overcurrent or thermal fault conditions. It remains asserted until the fault is cleared, providing a direct hardware interrupt signal to a microcontroller or system supervisor - no software polling required for real-time fault detection.

Can the TPS2034DG4 be used in 3.3 V systems?

Yes, the TPS2034DG4 supports input voltages from 2.7 V to 5.5 V and has logic-level compatible enable input (VIH ≥2 V). Its r_DS(on) increases modestly at 3.3 V (37–41 mΩ at 25°C), but remains well within specification for 3-A operation with appropriate thermal design.

What thermal considerations apply to the TPS2034DG4 in SOIC-8 package?

The TPS2034DG4 in SOIC-8 has R_θJA = 172°C/W. At 3 A and 33 mΩ, power dissipation is ~300 mW, resulting in ~52°C junction-to-ambient rise. For ambient temperatures up to 85°C, junction temperature stays below 137°C - within the 125°C max operating limit only with adequate PCB copper area or forced airflow.