Texas Instruments TPS71928-28DRVT

Overview

TPS71928-28DRVT from Texas Instruments is a dual-output, 200mA low-noise LDO regulator with independent enables, delivering fixed 2.8V on both outputs. It operates from 2.7V to 6.5V input, achieves 230mV dropout at full load, and features 70µVRMS output noise and 65dB PSRR at 1kHz - optimized for noise-sensitive RF and imaging power rails in compact portable systems.

For engineers reviewing the TPS71928-28DRVT datasheet, TPS71928-28DRVT pinout, TPS71928-28DRVT application, or TPS71928-28DRVT equivalent, key selection criteria include dual-rail stability with 1µF ceramic capacitors, active pulldown on both outputs for fast discharge, thermal shutdown at +160°C, and compatibility with 2mm × 2mm SON-6 layout constraints.

Technical Context

The TPS71928-28DRVT integrates two independent PMOS-based LDOs sharing a common IN and GND, each with dedicated EN1/EN2 control and output pins (OUT1/OUT2). Its sub-bandgap reference and BiCMOS process enable ±3% output accuracy over –40°C to +125°C, while the active pulldown circuit ensures rapid VOUT discharge during shutdown.

It uses a precision feedback loop with low-current mode operation down to zero load, maintaining regulation without minimum load requirements. The device is stable with 1µF X5R/X7R ceramic output capacitors and exhibits 160µs startup time and 180µs shutdown time under 1µF/14Ω test conditions.

Key Specifications

Pinout & Package

TPS71928-28DRVT is housed in a 2mm × 2mm WSON-6 (DRV) package with exposed thermal pad connected to GND. Pin 1 (OUT1) is marked by a dot; the package is RoHS-compliant with NiPdAu lead finish and MSL Level-1 rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS71928-28DRVR, the TPS71928-28DRVT offers identical performance in a smaller reel for development; versus TPS71828-28DRVT, it adds essential active pulldown and cuts ground current by 64%, directly improving battery runtime and system responsiveness.

Availability

TPS71928-28DRVT is available at Aetrix Electronics and suitable for mobile camera modules, wireless LAN transceivers, handheld medical sensors, and industrial IoT edge nodes requiring stable component supply with guaranteed long-term availability.

Supply support for TPS71928-28DRVT 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 and embedded processing technologies, with decades of LDO design expertise and broad automotive, industrial, and consumer portfolio coverage.

The TPS719xx family was engineered for dual-rail, low-noise, low-quiescent power management in space-constrained portable electronics - emphasizing fast transient response, factory-programmed precision, and robust thermal protection.

FAQ

What output voltages does the TPS71928-28DRVT provide?

The TPS71928-28DRVT delivers fixed 2.8V on both OUT1 and OUT2. This dual 2.8V configuration is factory-programmed via EEPROM and cannot be adjusted externally. The "28-28" in the part number explicitly denotes 2.8V for LDO1 and 2.8V for LDO2, eliminating resistor networks and simplifying layout for matched-rail applications like camera sensors or dual-core processors.

Does the TPS71928-28DRVT require minimum load current?

No, the TPS71928-28DRVT does not require a minimum load. Its innovative low-current mode circuit maintains output regulation down to zero load, ensuring stable 2.8V rails even during deep-sleep states in battery-powered devices. This capability is confirmed across –40°C to +125°C and eliminates the need for dummy loads that waste power and complicate thermal design.

How does the active pulldown feature work on the TPS71928-28DRVT?

The TPS71928-28DRVT integrates active pulldown circuitry on both OUT1 and OUT2. When either EN1 or EN2 is driven low, the corresponding output is actively discharged to GND with a typical time constant of 180µs (measured with 1µF capacitor and open load). This prevents floating outputs and residual voltage hold-up, which is critical for fast-recovery systems like camera auto-focus or RF transmit/receive switching.

Can the TPS71928-28DRVT operate with a 2.5V input supply?

No, the TPS71928-28DRVT requires a minimum input voltage of 2.7V. Its absolute minimum VIN is specified as 2.7V (or VOUT + VDO, whichever is greater), and VDO is 230mV at 200mA. With 2.8V outputs, the theoretical dropout-limited minimum is 3.03V - so 2.5V is below operational range and will result in unregulated or no output. Always maintain VIN ≥ 2.7V.

Is the TPS71928-28DRVT pin-compatible with other TPS719xx variants in DRV package?

Yes, all TPS719xx devices in the DRV (WSON-6) package share identical pinout, footprint, and thermal pad layout - including TPS71928-28DRVT, TPS71918-28DRVT, and TPS71933-28DRVT. This allows drop-in replacement across output voltage combinations without PCB redesign, provided the application tolerates the specific VOUT pair and thermal/power constraints.