Texas Instruments TPS7A1512PDRVR

Overview

TPS7A1512PDRVR from Texas Instruments is a 400-mA ultra-low-dropout linear regulator optimized for battery-powered systems requiring sub-1-V input and precise low-voltage outputs. It delivers 1.2 V at ±1% accuracy over load, line, and temperature, with 80 mV max dropout at 400 mA and 84 dB PSRR at 1 kHz - enabling stable power for core logic in compact portable devices.

For engineers reviewing the TPS7A1512PDRVR datasheet, TPS7A1512PDRVR pinout, TPS7A1512PDRVR application, or TPS7A1512PDRVR equivalent, this page provides verified package mapping (DRV WSON, 2 mm × 2 mm), validated pin functions, confirmed transient response (20 mV load step), real-world bias rail requirements (2.2–5.5 V), and two technically documented alternative parts for low-voltage LDO selection.

Technical Context

The TPS7A1512PDRVR uses a dual-rail architecture: the IN pin carries the main power path (0.7–2.2 V), while the BIAS pin (2.2–5.5 V) independently powers internal reference and control circuitry - decoupling regulation stability from ultra-low VIN constraints. This enables operation with VIN as low as VOUT + 100 mV.

It integrates active overshoot pulldown, foldback current limiting (ICL = 450–1100 mA, ISC = 270 mA), global UVLO on both IN and BIAS pins (with hysteresis), and thermal shutdown (165°C trip, 140°C reset). The SENSE pin supports remote feedback for trace-resistance compensation in high-precision loads.

Key Specifications

Pinout & Package

TPS7A1512PDRVR is packaged in a 6-pin, 2-mm × 2-mm WSON (DRV) package with exposed thermal pad electrically tied to GND. The thermal pad must be soldered to PCB ground plane for reliable 125°C operation and optimal thermal resistance (RθJA = 75.7°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-input, low-output LDO applications.

Compared with TPS7A1512PDRVR, TPS7A1612DQNR trades 200 mA current capacity and key protection features for nanoamp quiescent current, while NCP114AMX12T2G sacrifices ultra-low VIN operation and fault robustness for cost-sensitive, moderate-performance applications - making TPS7A1512PDRVR the only option supporting 400 mA, 0.7 V VIN, and full protection suite in a 2 mm × 2 mm WSON.

Availability

TPS7A1512PDRVR is available at Aetrix Electronics and suitable for camera modules, wireless earbuds, and smart watches requiring stable component supply across high-mix, low-volume production cycles and long-lifecycle consumer electronics programs.

Supply support for TPS7A1512PDRVR 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for portable and industrial applications.

The TPS7A15 family was designed specifically for ultra-low-input, ultra-low-output LDO applications in battery-powered devices - addressing the need for high efficiency, precision regulation, and robust transient response below 1 V.

FAQ

What is the minimum input voltage required for TPS7A1512PDRVR to regulate 1.2 V output?

The TPS7A1512PDRVR requires VIN ≥ VOUT + 100 mV for full specification compliance, meaning 1.3 V minimum. However, it can operate down to 0.7 V on the IN pin when the BIAS pin supplies ≥2.2 V or VOUT + 1.4 V (i.e., ≥2.6 V). Below 1.3 V, regulation accuracy and PSRR degrade per datasheet curves - so 1.3 V is the practical minimum for guaranteed 1.2 V ±1% performance in the TPS7A1512PDRVR.

Does TPS7A1512PDRVR support remote sensing, and how is it implemented?

Yes, TPS7A1512PDRVR supports remote sensing via the SENSE pin. To implement, connect SENSE directly to the load's VCC pin (not the OUT pin), which closes the feedback loop at the point of load consumption. This compensates for voltage drop across PCB traces or connectors between OUT and the load. The TPS7A1512PDRVR's error amplifier then regulates based on the sensed voltage, maintaining 1.2 V accuracy at the load despite IR losses - critical for high-current or long-trace applications.

What is the purpose of the BIAS pin on TPS7A1512PDRVR, and what happens if it is left unconnected?

The BIAS pin on TPS7A1512PDRVR powers the internal reference, error amplifier, and control circuitry independently from the main IN rail. It must be supplied with 2.2–5.5 V; leaving it unconnected or below 2.2 V disables the device due to BIAS UVLO (1.3 V falling threshold). Without BIAS, the TPS7A1512PDRVR cannot regulate - even if IN is within 0.7–2.2 V - because internal circuitry lacks operating voltage. A 0.1 µF ceramic capacitor to GND is required on BIAS for noise immunity and transient stability.

How does the active discharge function work in TPS7A12PDRVR, and what is its design impact?

The TPS7A1512PDRVR's active discharge uses an internal MOSFET that connects a 36 Ω pulldown resistor between OUT and GND when the device is disabled (via EN low, UVLO, or thermal shutdown). This rapidly discharges output capacitance - reducing VOUT to near-zero in microseconds - ensuring predictable power-down states and preventing unintended logic states in downstream circuits. Design impact includes eliminating need for external bleed resistors, faster system reset timing, and compatibility with strict power sequencing requirements in multi-rail systems.

Can TPS7A1512PDRVR be used without the enable (EN) pin, and what is the recommended connection?

Yes, TPS7A1512PDRVR can be used without external enable control. The EN pin must not be left floating: it must be tied to either the IN pin or the BIAS pin to ensure the device remains enabled. Connecting EN to IN is preferred when BIAS voltage may be absent during initial power-up, as it guarantees activation once IN rises above 603 mV. This configuration retains all protections (UVLO, thermal shutdown, current limit) while simplifying layout - no additional pull-up resistor or control logic is needed for basic operation.