Texas Instruments TPS715A01DRBRG4

Overview

TPS715A01DRBRG4 from Texas Instruments is an 80-mA, adjustable-output low-dropout linear regulator with 3.2-μA quiescent current, 2.5–24-V input range, and 1.205–15-V output capability. It features internal soft-start, overcurrent protection, and operates from –40°C to +125°C junction temperature - designed for ultra-low-power battery-powered systems such as MSP430-based sensor nodes and portable medical monitors.

For engineers reviewing the TPS715A01DRBRG4 datasheet, TPS715A01DRBRG4 pinout, TPS715A01DRBRG4 application, or TPS715A01DRBRG4 equivalent, key selection criteria include dropout voltage at 80 mA (650 mV typ), ground current stability across load (3.2–4.8 μA), output capacitor minimum (1 μF for new chip), and compatibility with 3-mm × 3-mm VSON-8 (DRB) thermal performance (R_θJA = 55.8°C/W).

Technical Context

The TPS715A01DRBRG4 implements a CMOS pass transistor architecture with a 1.205-V internal bandgap reference and leakage-null control circuit active under high-VIN/low-IOUT/high-TJ conditions. Its brick-wall overcurrent protection triggers at 160–500 mA depending on VIN, and internal soft-start limits inrush into the output capacitor during power-up.

This device operates in two distinct functional modes: normal regulation (VIN ≥ VOUT + VDO) and dropout (VIN < VOUT + VDO), where output voltage tracks input and transient response degrades significantly. Dropout exit causes temporary overshoot due to pass transistor recovery dynamics.

Key Specifications

Pinout & Package

TPS715A01DRBRG4 uses the DRB package: 3-mm × 3-mm, 8-pin VSON with exposed thermal pad. Pin 1 is IN; pins 4 and 6 are GND (including thermal pad); pin 8 is OUT; pins 2, 3, 5, and 7 are NC (no-connect, recommended tied to GND for thermal improvement).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS715A01DRBRG4, TPS71533DRBR offers drop-in replacement for fixed 3.3-V use with zero layout change, while TLV70718DSET trades wide-input capability for smaller footprint and higher IQ - making it unsuitable for battery-backed industrial sensors but viable for consumer wearables.

Availability

TPS715A01DRBRG4 is available at Aetrix Electronics and suitable for smart utility metering, portable medical monitors, industrial sensor nodes, and MSP430-based wireless nodes requiring stable component supply across extended product lifecycles.

Supply support for TPS715A01DRBRG4 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 over 90 years of innovation in power management ICs.

The TPS715A family was engineered for ultra-low-power, wide-input industrial and battery-powered systems - emphasizing quiescent current optimization, thermal resilience in miniaturized packages, and robust fault protection for mission-critical edge devices.

FAQ

What is the maximum input voltage rating for TPS715A01DRBRG4?

The TPS715A01DRBRG4 has an absolute maximum input voltage of 30 V for the new-chip revision. Its recommended operating input range is 2.5 V to 24 V. Exceeding 24 V during normal operation risks violating recommended conditions, though brief transients up to 30 V are tolerated per absolute maximum ratings - provided duration and energy remain within safe SOA limits defined in the datasheet.

Does TPS715A01DRBRG4 require an external capacitor on the FB pin for stability?

No, TPS715A01DRBRG4 does not require an external capacitor on the FB pin. Stability is ensured by the output capacitor (≥1 μF ceramic, derated to ≥0.47 μF effective). The FB pin is high-impedance and connects directly to the internal error amplifier; adding capacitance there would degrade transient response and is not specified or recommended in the datasheet.

Can TPS715A01DRBRG4 be used with a 0.47-μF output capacitor?

TPS715A01DRBRG4 requires ≥1 μF nominal output capacitance (derated to ≥0.47 μF effective) for guaranteed stability. A 0.47-μF capacitor alone fails this requirement - its effective value after 50% derating falls below 0.47 μF. Use a 1-μF or larger X7R/X5R ceramic capacitor rated for the full operating temperature range to meet the specification.

What is the purpose of the NC pins on TPS715A01DRBRG4?

The NC pins (2, 3, 5, 7) on TPS715A01DRBRG4 are internally unconnected. TI recommends tying them to GND to improve thermal conduction from the die through the package sidewalls and reduce EMI susceptibility. Leaving them floating is electrically acceptable but compromises thermal performance and noise immunity - especially critical in high-density or thermally constrained layouts.

How does the leakage null control circuit affect TPS715A01DRBRG4 operation?

The leakage null control circuit in TPS715A01DRBRG4 activates only under specific conditions: output load <5 μA, VIN >18 V, and junction temperature >100°C. It suppresses pass transistor leakage current to maintain ultra-low ground current. This circuit does not impact normal operation (IOUT ≥100 μA) or room-temperature performance - it is a corner-case enhancement for high-voltage, high-temperature, ultra-low-power standby modes.