Texas Instruments TPS7A1412PDRVR

Overview

TPS7A1412PDRVR from Texas Instruments is a 1-A ultra-low-dropout linear regulator (LDO) designed for low-voltage, high-efficiency power delivery in space-constrained portable electronics. It operates with input voltage as low as 0.7 V, delivers fixed 1.2 V output at ±1% accuracy over –40°C to +125°C, and achieves 70 mV max dropout at 1 A load in WSON package. It is used in camera modules and wireless earbuds where minimal VIN–VOUT headroom and fast transient response are critical.

For engineers reviewing the TPS7A1412PDRVR datasheet, TPS7A1412PDRVR pinout, TPS7A1412PDRVR application, or TPS7A1412PDRVR equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and PSRR performance, and real-world selection guidance for LILO (low-input, low-output) LDO design in battery-powered systems.

Technical Context

The TPS7A1412PDRVR uses a dual-rail architecture: the IN pin supplies the main power path (down to 0.7 V), while the BIAS pin (2.2–5.5 V) powers internal reference and control circuitry-enabling stable regulation even when VIN is only 100 mV above VOUT. Its foldback current limit protects against short-circuit faults, and global UVLO ensures simultaneous valid VIN and VBIAS before enabling output.

It features active output discharge via internal pulldown resistor (36 Ω), SENSE pin for remote feedback to compensate PCB trace resistance, and high PSRR (80 dB @ 1 kHz, 500 mA load). All electrical specs-including 1% output accuracy and 20 mV load transient deviation-are guaranteed under VIN = VOUT + 100 mV conditions.

Key Specifications

Pinout & Package

TPS7A1412PDRVR is packaged in a 6-pin WSON (DRV) package: 2 mm × 2 mm body with exposed thermal pad electrically tied to GND. The thermal pad must be soldered to PCB ground plane for optimal thermal performance (R_θJB = 32.7°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A1612PDRVR and NCP114AMX120TBG, the TPS7A1412PDRVR uniquely supports 1 A load, 0.7 V input, remote SENSE, and dual-rail (IN/BIAS) architecture-making it the only viable option for high-current, ultra-low-headroom, precision-regulated rails in modern portable SoCs.

Availability

TPS7A1412PDRVR is available at Aetrix Electronics and suitable for camera modules, wireless earbuds, and smart watches requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS7A1412PDRVR 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 expertise in power management ICs for portable, industrial, and automotive markets.

The TPS7A14 product line is engineered for ultra-low-input, ultra-low-output LDO applications in battery-powered devices-prioritizing minimal dropout, high accuracy, and exceptional transient response in sub-2 mm² packages.

FAQ

What is the minimum input voltage required for TPS7A1412PDRVR to regulate 1.2 V output?

The TPS7A1412PDRVR requires VIN ≥ VOUT + 100 mV for full specification compliance, meaning 1.3 V minimum input under recommended conditions. However, it can begin regulating as low as 0.7 V input-though dropout, accuracy, and PSRR degrade below VIN = VOUT + 100 mV. The BIAS pin (≥2.2 V or VOUT + 1.4 V) must also be valid for proper operation. This dual-rail design enables functional regulation even when VIN is only marginally above VOUT.

Does TPS7A1412PDRVR support remote voltage sensing, and how is it implemented?

Yes, TPS7A1412PDRVR supports remote sensing via its dedicated SENSE pin (Pin 2). To implement, connect SENSE directly to the load's VDD point-not to the OUT pin-so the regulator closes the feedback loop at the actual load location. This compensates for IR drop across PCB traces between OUT and the load, maintaining ±1% output accuracy at the load under varying current. The SENSE pin has high impedance and does not source/sink significant current.

What is the purpose of the BIAS pin on TPS7A1412PDRVR, and what voltage must it be supplied with?

The BIAS pin (Pin 4) powers the internal reference, error amplifier, and control circuitry independently of the main IN pin. It must be supplied with 2.2 V to 5.5 V-specifically, ≥ greater of 2.2 V or VOUT(NOM) + 1.4 V (i.e., ≥2.6 V for TPS7A1412PDRVR). This allows the IN pin to operate as low as 0.7 V while maintaining full functionality, dramatically improving efficiency in LILO applications where VIN is barely above VOUT.

How does the active discharge feature work on TPS7A1412PDRVR, and what is its typical pull-down resistance?

When TPS7A1412PDRVR is disabled (EN low, UVLO triggered, or thermal shutdown), an internal MOSFET connects a 36 Ω pulldown resistor between OUT and GND. This actively discharges the output capacitance to ensure predictable, rapid ramp-down-critical for power sequencing. Discharge time depends on COUT and parallel load resistance. For example, with 10 µF COUT and no load, t_discharge ≈ 5×RC ≈ 1.8 ms to reach <5% VOUT. Reverse current from OUT to IN must be limited to <5% of rated current to avoid damage.

What thermal performance can be expected from TPS7A1412PDRVR in its WSON package?

In the 2 mm × 2 mm WSON (DRV) package, TPS7A1412PDRVR has R_θJA = 72.7°C/W (JEDEC standard board) and R_θJB = 32.7°C/W (board-level). With the exposed thermal pad properly soldered to a 1-in² 2-oz copper GND plane, junction-to-board resistance drops significantly. At 1 A load with 100 mV dropout (100 mW dissipation), temperature rise above ambient is ~3.3°C above board-demonstrating excellent thermal efficiency for its size and current rating.