Texas Instruments TPS73430DRVR

Overview

TPS73430DRVR from Texas Instruments is a 250mA, fixed-output (3.0V), ultra-low-noise low-dropout linear regulator in a 2mm × 2mm WSON-6 package. It delivers 2% output accuracy over load, line, and temperature (–40°C to +125°C), features 44µA quiescent current, 125mV dropout at 250mA, and 28µV_RMS output noise with NR pin support - ideal for powering RF front-ends and precision analog circuitry in portable wireless devices.

For engineers reviewing the TPS73430DRVR datasheet, TPS73430DRVR pinout, TPS73430DRVR application, or TPS73430DRVR equivalent, key selection criteria include its 3.0V fixed output, SON-6 thermal performance (R_θJA = 65°C/W on high-K board), EN-active-high control logic, NR pin for noise reduction, and stability with ≥2.0µF ceramic output capacitance.

Technical Context

The TPS73430DRVR uses a PMOS pass transistor architecture enabling low dropout (125mV @ 250mA) and inherent reverse-voltage protection via the body diode. Its feedback loop incorporates a precision 1.208V internal reference and high-gain error amplifier, delivering 2% overall accuracy and fast load transient response.

It integrates undervoltage lockout (UVLO with 70mV hysteresis), thermal shutdown (trip at +165°C, reset at +145°C), and foldback current limiting. The NR pin supports external 0.01µF capacitor to reduce bandgap noise contribution, enabling ultra-low 28µV_RMS output noise across 10Hz–100kHz bandwidth.

Key Specifications

Pinout & Package

TPS73430DRVR is housed in a thermally enhanced 2mm × 2mm WSON-6 package (DRV) with an exposed thermal pad. The package supports high-power-density layouts and achieves R_θJA = 65°C/W on JEDEC high-K board, enabling 1.54W continuous dissipation at T_A = +25°C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with TPS73430DDCR, the TPS73430DRVR offers superior thermal performance (65°C/W vs. 200°C/W) and integrated noise reduction - critical for RF and precision analog. Versus TLS850F3TAV50, it provides exact 3.0V output and 28µV_RMS noise, but lacks automotive qualification.

Availability

TPS73430DRVR is available at Aetrix Electronics and suitable for Wi-Fi 6 transceivers, portable medical sensors, and industrial PLC analog I/O modules requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS73430DRVR 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 connectivity technologies, with decades of LDO design expertise and broad industrial qualification.

The TPS734xx family was engineered for ultra-low-noise, low-I_Q power management in battery-powered RF and precision analog systems - targeting wireless infrastructure, portable diagnostics, and high-fidelity signal chains.

FAQ

What is the maximum input voltage rating for the TPS73430DRVR?

The TPS73430DRVR has an absolute maximum input voltage (V_IN) of +7.0V, but its recommended operating range is 2.7V to 6.5V per electrical specifications. Exceeding 6.5V may degrade long-term reliability or trigger internal protection circuits. Always maintain V_IN ≤ 6.5V in normal operation to ensure compliance with the 2% output accuracy specification across temperature and load.

Does the TPS73430DRVR require an external feedback resistor network?

No, the TPS73430DRVR is a fixed-output 3.0V regulator and does not require external feedback resistors. It uses an internal precision voltage reference and feedback loop. Unlike the adjustable TPS73401 variant, the TPS73430DRVR integrates all regulation circuitry internally - simplifying layout and eliminating resistor tolerance errors that affect output accuracy.

Can the NR pin of the TPS73430DRVR be left unconnected?

No - leaving the NR pin (Pin 2) unconnected degrades noise performance. To achieve the specified 28µV_RMS output noise, a 0.01µF ceramic capacitor must be placed between NR and GND. If ultra-low noise is not required, the NR pin may be tied directly to GND, but this increases output noise to ~95×V_OUT µV_RMS (≈285µV_RMS).

What is the thermal shutdown behavior of the TPS73430DRVR?

The TPS73430DRVR activates thermal shutdown at approximately +165°C junction temperature and resets at +145°C. During shutdown cycling, the output is disabled and ground current drops to ≤1.0µA. This hysteresis prevents oscillation near the trip point. For reliable operation, design PCB layout to keep T_J ≤ +125°C under worst-case load - verified using R_θJA = 65°C/W on high-K board.

Is the TPS73430DRVR compatible with 1.8V enable logic?

Yes - the TPS73430DRVR EN pin has a guaranteed V_EN(HI) threshold of 1.2V minimum and draws only 0.03µA typical current at V_EN = V_IN = 6.5V. This makes it fully compatible with 1.8V GPIO outputs without level-shifting, enabling direct interface to ultra-low-power microcontrollers such as MSP430FRxx or nRF52840 in battery-operated systems.