Texas Instruments TPS7A7300RGWR

Overview

TPS7A7300RGWR from Texas Instruments is a 3-A, fast-transient, low-dropout (LDO) voltage regulator with 240 mV dropout at full load, 1.5 V to 6.5 V input range, and user-configurable output from 0.9 V to 3.5 V via six binary-weighted voltage-setting pins. It delivers ±2% output accuracy over line, load, and temperature, features power-good signaling and programmable soft-start, and is used in RF power amplifiers and point-of-load regulation for baseband processors.

For engineers reviewing the TPS7A7300RGWR datasheet, TPS7A7300RGWR pinout, TPS7A7300RGWR application, or TPS7A7300RGWR equivalent, key selection criteria include dropout performance at 3 A, ceramic-capacitor stability, output voltage configurability without external resistors, thermal management in 5-mm × 5-mm VQFN, and sequencing support via open-drain PG and SS pins.

Technical Context

The TPS7A7300RGWR employs an internal 0.5-V reference with binary-weighted feedback network (50 mV to 1.6 V pins) enabling precise 50-mV-step output programming from 0.9 V to 3.5 V in fixed mode. Its architecture integrates a charge pump and current-limit protection with thermal shutdown at 160°C.

Transient response is optimized via high-bandwidth error amplifier and internal compensation, achieving sub-100-µs recovery from 1-A load steps. The device operates stably with ≥4.7 µF ceramic output capacitance and supports feedforward capacitor (up to 100 nF) for enhanced PSRR above 10 kHz.

Key Specifications

Pinout & Package

TPS7A7300RGWR is housed in a 5-mm × 5-mm, 20-pin VQFN package with exposed thermal pad. Pin assignment follows TI's RGW footprint, requiring solder connection of the thermal pad to a large-area ground plane for thermal integrity and EMI control.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A7300RGWR, TPS7A7200RGWR offers identical functionality at reduced current capacity, while TPS7A8300RGWR trades configurability for lower noise and dropout - making TPS7A7300RGWR optimal for flexible, high-current, resistorless POL designs.

Availability

TPS7A7300RGWR is available at Aetrix Electronics and suitable for wireless infrastructure, RF power amplifier biasing, and industrial embedded computing requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS7A7300RGWR 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 automotive, industrial, and communications product portfolios.

The TPS7A7300RGWR belongs to TI's high-performance LDO family targeting point-of-load regulation in space-constrained, thermally demanding applications - designed specifically to replace multiple fixed-output regulators with a single configurable device.

FAQ

What is the minimum input voltage required for TPS7A7300RGWR to regulate 0.9 V output at 3 A?

The TPS7A7300RGWR requires VIN ≥ VOUT + 0.3 V for outputs ≤3.5 V. For 0.9 V output, minimum input is 1.2 V; however, datasheet specifies 1.425 V as absolute minimum operating VIN to ensure stability and accuracy across temperature. At 3 A load, 1.425 V input yields 240-mV dropout, meeting regulation spec.

Can TPS7A7300RGWR be used in adjustable mode with external resistors, and what is the maximum supported output voltage?

Yes, TPS7A7300RGWR supports traditional adjustable configuration via FB and SNS pins. With external resistors, output voltage range extends to 0.9 V–5.0 V. However, accuracy degrades to ±3% above 3.5 V, and the device is not characterized for VOUT > 3.5 V in fixed-pin mode per datasheet Table 6-1.

How does the thermal pad of TPS7A7300RGWR affect its maximum output current capability?

The exposed thermal pad on TPS7A7300RGWR must be soldered to a solid GND plane to achieve RθJB = 15.2°C/W. Without proper thermal pad connection, junction temperature rises rapidly - limiting continuous output current to <1.5 A at ambient 85°C. Full 3-A rating requires ≥200 mm² copper area and ≥4 thermal vias under the pad.

What is the purpose of the SNS (sense) pin on TPS7A7300RGWR, and when should it be used?

The SNS pin enables remote voltage sensing to compensate for IR drop across PCB traces between the LDO and load. It should be used when output trace length exceeds 25 mm or current exceeds 1.5 A. Connect SNS directly to the load's VDD pin, separate from the main OUT trace, to maintain ±0.5% regulation accuracy at the point of load.

Does TPS7A7300RGWR support power sequencing with other voltage rails, and how is it implemented?

Yes, TPS7A7300RGWR supports sequencing via its open-drain PG pin and EN input. PG asserts high when VOUT reaches 90% of target, enabling it to drive the EN pin of a downstream regulator. For reverse sequencing, tie EN to a delayed supply or microcontroller GPIO. No external logic is needed - PG hysteresis (2% of VOUT) prevents chatter during marginal conditions.