Texas Instruments TPS79928DRVR

Overview

TPS79928DRVR from Texas Instruments is a 200-mA, low-quiescent-current, ultralow-noise, high-PSRR low-dropout linear regulator delivering fixed 2.8 V output with ±2% accuracy over –40°C to +125°C, 100 mV typical dropout at full load, and 40 μA ground current - designed for powering noise-sensitive RF and precision analog circuitry in space-constrained portable systems.

For engineers reviewing the TPS79928DRVR datasheet, TPS79928DRVR pinout, TPS79928DRVR application, or TPS79928DRVR equivalent, this page delivers verified package mapping (DRV 6-pin WSON), validated pin functions, confirmed noise performance (10.5 × VOUT μVRMS, 10 Hz–100 kHz), PSRR (66 dB @ 1 kHz), and real-world design implications of its NR pin, EN toggle startup, and thermal shutdown behavior.

Technical Context

The TPS79928DRVR employs a PMOS pass element with integrated body diode and a high-gain, high-bandwidth error amplifier to sustain high PSRR (≥66 dB at 1 kHz) even at low headroom (VIN – VOUT = 0.25 V). Its noise-reduction (NR) pin connects to an external 0.01-μF capacitor that bypasses bandgap reference noise, reducing total output noise to 10.5 × VOUT μVRMS.

Startup uses a dedicated quick-start circuit that charges the NR capacitor within ~135 μs; enable logic supports TTL/CMOS-compatible active-high control (VEN(HI) ≥ 1.2 V), with shutdown current < 1 μA. Built-in UVLO (2.2 V threshold, 70 mV hysteresis), thermal shutdown (165°C trip), and current limiting (220–600 mA) ensure robust operation across industrial and portable environments.

Key Specifications

Pinout & Package

TPS79928DRVR is packaged in a 6-pin WSON (DRV) with exposed thermal pad (2.00 mm × 2.00 mm body), optimized for thermal performance in high-density PCB layouts. The package supports reflow soldering per JEDEC J-STD-020 and requires GND pad connection for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise LDO applications.

Compared with TPS79928DRVR, TPS799285DRVR offers identical performance with a 50-mV higher output, while MCP1703T-2802E/MB trades off noise, PSRR, and dropout for lower cost and higher output current - making TPS79928DRVR optimal for RF/analog bias where noise and efficiency are paramount.

Availability

TPS79928DRVR is available at Aetrix Electronics and suitable for RF power amplifier bias, VCO core supply, wearable sensor hubs, and industrial wireless nodes requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS79928DRVR 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 LDO innovation focused on performance, reliability, and manufacturability.

The TPS799 product line was engineered specifically for noise-sensitive RF and precision analog applications demanding ultralow noise, high PSRR, and minimal quiescent current in miniature packages - targeting smartphones, wearables, and wireless infrastructure.

FAQ

What is the maximum input voltage rating for the TPS79928DRVR?

The TPS79928DRVR has an absolute maximum input voltage of 7.0 V. However, the recommended operating range is 2.7 V to 6.5 V. Exceeding 6.5 V may trigger internal protection circuits or degrade long-term reliability, even if within absolute max ratings. Always maintain VIN ≤ 6.5 V in normal operation for TPS79928DRVR.

Does the TPS79928DRVR require an input capacitor for stability?

No, the TPS79928DRVR does not require an input capacitor for stability, but TI recommends a 0.1-μF to 1-μF low-ESR ceramic capacitor near the IN pin to improve transient response, reduce source impedance, and enhance PSRR - especially when powered from noisy or high-impedance supplies. This is good practice but not mandatory for basic regulation of TPS79928DRVR.

Can the TPS79928DRVR be used without connecting the NR pin?

Yes, the TPS79928DRVR operates fully functional with the NR pin left unconnected or tied to OUT. However, leaving NR open forfeits the noise-reduction benefit: output noise rises from 29.4 μVRMS (with 0.01-μF CNR) to ~94 × VOUT μVRMS (~263 μVRMS). For RF or precision analog use, connecting NR is strongly advised to achieve TPS79928DRVR's specified ultralow-noise performance.

What thermal performance can be expected from the TPS79928DRVR in the DRV package?

In the 6-pin WSON (DRV) package, the TPS79928DRVR has a junction-to-ambient thermal resistance (RθJA) of 74.2°C/W and junction-to-board (RθJB) of 145.9°C/W. With proper PCB copper area under the exposed thermal pad, it sustains 200 mA continuous output at +85°C ambient. At 125°C junction, derating to ~150 mA is recommended - verified in TPS79928DRVR thermal characterization data.

Is the TPS79928DRVR pin-compatible with other TPS799 variants in the same DRV package?

Yes, all TPS799 variants in the DRV (6-pin WSON) package - including TPS79928DRVR, TPS79933DRVR, and TPS79918DRVR - share identical pinout, footprint, and thermal pad layout. Only the output voltage differs; NR pin functionality and EN logic remain consistent. This enables drop-in voltage-scaling substitutions without PCB redesign for TPS79928DRVR and related parts.