Texas Instruments TPS709A30DBVT

Overview

TPS709A30DBVT from Texas Instruments is a 30-V input, 3.0-V fixed-output ultra-low-quiescent-current LDO linear regulator in SOT-23-5 package, delivering 150 mA output with 1 µA IQ, ±2% output accuracy over temperature, and reverse-current protection - ideal for battery-powered smoke detectors and thermostats requiring long standby life.

For engineers reviewing the TPS709A30DBVT datasheet, TPS709A30DBVT pinout, TPS709A30DBVT application, or TPS709A30DBVT equivalent, key selection considerations include dropout voltage at 150 mA (≤1400 mV), shutdown current (150 nA), thermal shutdown threshold (158°C), PSRR at 100 Hz (62 dB), and compatibility with ≥2.2-µF ceramic output capacitance.

Technical Context

The TPS709A30DBVT employs a PMOS pass transistor architecture enabling low dropout operation while maintaining ultra-low ground current in dropout - critical for extending battery runtime in always-on systems. Its internal bandgap reference and error amplifier deliver 2% DC output accuracy across –40°C to +125°C junction temperature.

Functional modes are controlled via the EN pin: logic-high (>0.9 V) enables regulation with 1 µA quiescent current; logic-low (<0.4 V) forces shutdown with 150 nA supply current. Reverse-current protection is always active, limiting OUT→IN leakage to 10 nA when VOUT > VIN.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, thermal pad electrically tied to GND - requires soldering to PCB ground plane for optimal thermal performance (RθJB = 39.5°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS709A30DBVT, TPS70930DBVR offers identical performance in a production-optimized reel format, while MCP1703T-3002E/MB trades 0.8 µA higher IQ and ±1% lower accuracy for lower unit cost - making TPS709A30DBVT the preferred choice for ultra-long-life, precision-biased applications.

Availability

TPS709A30DBVT is available at Aetrix Electronics and suitable for smoke detectors, thermostats, motion detectors, and electricity meters requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.

Supply support for TPS709A30DBVT 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and consumer markets.

The TPS709 series targets ultra-low-power, wide-input-voltage linear regulation - specifically engineered for battery-operated safety and sensing devices where micropower efficiency and reliability are non-negotiable.

FAQ

What is the maximum input voltage rating for the TPS709A30DBVT?

The TPS709A30DBVT has an absolute maximum input voltage of 32 V, but its recommended operating input voltage range is 2.7 V to 30 V. Exceeding 30 V may degrade long-term reliability or trigger overvoltage stress, even if within absolute maximum limits. The device is designed for robust operation across industrial and battery-derived supplies up to 30 V nominal.

Does the TPS709A30DBVT require an input capacitor?

The TPS709A30DBVT does not require an input capacitor for stability, but TI recommends a 0.1-µF to 2.2-µF ceramic capacitor from IN to GND to improve transient response, reduce input ripple, and enhance PSRR. An input capacitor becomes mandatory if line transients exceeding 10 V are expected - a common requirement in automotive or industrial environments where the TPS709A30DBVT is deployed.

Can the TPS709A30DBVT be used with output capacitance less than 2.2 µF?

Yes - for the 3.0-V output version, the minimum stable output capacitance is 1.5 µF (since VOUT ≥ 1.5 V). A 2.2-µF X7R ceramic capacitor is the recommended value for optimal transient response and margin, but 1.5 µF meets the stability requirement. Capacitors must have ESR between 0 Ω and 0.2 Ω; X5R/X7R ceramics satisfy this across temperature and bias.

How does reverse-current protection function in the TPS709A30DBVT?

The TPS709A30DBVT integrates active reverse-current protection that blocks current flow from OUT to IN whenever VOUT > VIN, limiting leakage to ≤10 nA. This feature is always enabled - independent of EN pin state - and operates across the full output voltage range. It prevents battery drain in multi-rail systems and protects against backfeeding when auxiliary supplies are present, a critical safeguard in smoke detectors and smart meters.

What is the thermal shutdown behavior of the TPS709A30DBVT?

The TPS709A30DBVT activates thermal shutdown at 158°C junction temperature and resets automatically when temperature falls below 140°C. During shutdown, the output goes high-impedance and input current drops to 150 nA. This hysteresis prevents oscillation near the trip point and allows safe recovery without manual reset - essential for sealed, maintenance-free applications like wall-mounted thermostats and electricity meters.