Texas Instruments TPS79030DBVT

Overview

TPS79030DBVT from Texas Instruments is a 3.0-V, 50-mA ultra-low-power, low-noise LDO voltage regulator in a 5-pin SOT-23 (DBV) package. It delivers 56 µV_RMS output noise with 0.01 µF bypass and 10 µF output capacitors, features 57 mV typical dropout at 50 mA, and draws only 17 µA quiescent current-enabling extended battery life in portable instrumentation and wireless sensor nodes.

For engineers reviewing the TPS79030DBVT datasheet, TPS79030DBVT pinout, TPS79030DBVT application, or TPS79030DBVT equivalent, key selection criteria include its PMOS pass element architecture, enable-controlled 1 µA standby mode, 150-kΩ internal bypass resistor for noise filtering, –40°C to 125°C junction temperature range, and compatibility with low-ESR ceramic output capacitors (4.7–10 µF).

Technical Context

The TPS79030DBVT uses a PMOS pass element instead of a conventional PNP transistor, eliminating load-dependent drive current and enabling stable 17 µA quiescent current across 0–50 mA output. Its internal 150-kΩ resistor on the BYPASS pin forms an RC low-pass filter with external capacitance to suppress reference noise.

Dropout voltage scales linearly with load (57 mV @ 50 mA, typ.), and thermal shutdown activates at ~165°C with automatic recovery below ~140°C. Current limiting engages at ~350 mA, reducing output voltage rather than increasing current to protect the device.

Key Specifications

Pinout & Package

TPS79030DBVT is housed in a JEDEC-standard 5-pin SOT-23 (DBV) package-1.6 mm × 2.9 mm footprint, 1.1 mm height-with gull-wing leads optimized for automated assembly and thermal performance (R_θJA = 259 °C/W on low-K board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS79030DBVT, TPS79030DBVT offers superior noise filtering integration and lower dropout, while TPS79930DBVR trades off some ease-of-use for lower IQ and higher PSRR-making TPS79030DBVT optimal for space-constrained, battery-powered systems needing guaranteed low-noise performance without external filter design.

Availability

TPS79030DBVT is available at Aetrix Electronics and suitable for wearable electronics, industrial sensor networks, automotive cabin modules, and portable medical devices requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for TPS79030DBVT 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 delivering analog and embedded processing solutions, with decades of expertise in power management ICs for high-reliability applications.

The TPS790xx family was designed specifically for battery-operated portable equipment-prioritizing ultralow quiescent current, low-noise regulation, and minimal board area through SOT-23 packaging.

FAQ

What is the minimum input voltage required for TPS79030DBVT to deliver full 50 mA output?

The minimum input voltage for TPS79030DBVT is VO(typ) + 1 V = 4.0 V under recommended operating conditions. At 50 mA load, the 57 mV typical dropout means regulation remains stable down to 3.057 V-but full 50 mA capability is only guaranteed above 4.0 V per datasheet Section "Recommended Operating Conditions." Below 4.0 V, output current capability decreases progressively.

How does the BYPASS pin function in TPS79030DBVT, and what capacitor value is recommended?

The BYPASS pin in TPS79030DBVT connects internally to the voltage reference through a 150-kΩ resistor. Adding an external ceramic capacitor (e.g., 0.01 µF) forms an RC low-pass filter that attenuates reference noise-reducing total output noise to 56 µV_RMS. Larger values slow startup due to increased RC time constant; 0.001–0.1 µF is the validated range per Figure 11.

Does TPS79030DBVT support reverse current protection, and what happens if VIN falls below VOUT?

TPS79030DBVT does not include active reverse-current protection. Its PMOS pass element contains an intrinsic back-gate diode that conducts from OUT to IN when VIN < VOUT (e.g., during power-down). This uncontrolled reverse current can discharge downstream capacitors or back-feed upstream circuitry-external blocking diodes or MOSFET-based OR-ing circuits are required for isolation.

What output capacitor specifications are mandatory for stable operation of TPS79030DBVT?

TPS79030DBVT requires a minimum 4.7 µF ceramic output capacitor with ESR between 0.2 Ω and 10 Ω. Capacitors outside this ESR range risk instability-verified in Figures 24 and 25. Multilayer ceramics often fall below 0.2 Ω and may require a small series resistor; solid tantalum types like KEMET T494B475K016AS (1.5 Ω max) are validated alternatives.

Is TPS79030DBVT pin-compatible with other members of the TPS790xx family, such as TPS79018DBVT or TPS79025DBVT?

Yes-TPS79030DBVT shares identical 5-pin SOT-23 (DBV) package, pinout, and terminal functions with all TPS790xx variants (TPS79015/18/25/28/30). Only the output voltage differs; all share the same enable behavior, BYPASS architecture, thermal limits, and electrical interface-enabling drop-in replacement across voltage options in existing layouts.