Texas Instruments TPS7A1412PYBKR

Overview

TPS7A1412PYBKR from Texas Instruments is a 1-A 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 fixed output with ±1% accuracy over –40°C to +125°C, 70 mV max dropout at 1 A (YBK package), and supports input as low as 0.7 V via dedicated BIAS rail - enabling use in camera modules and wearables where efficiency and transient response are critical.

For engineers reviewing the TPS7A1412PYBKR datasheet, TPS7A1412PYBKR pinout, TPS7A1412PYBKR application, or TPS7A1412PYBKR equivalent, this page provides verified electrical parameters, WCSP package layout details, load transient performance (20 mV deviation in 20 µs), PSRR (80 dB @ 1 kHz), and design-critical guidance on BIAS/SENSE pin implementation and active discharge behavior.

Technical Context

The TPS7A1412PYBKR employs 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) 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 while maintaining full specification compliance.

It integrates a foldback current limit (ICL = 1.035–2.45 A), thermal shutdown (165°C trip), global UVLO (IN and BIAS monitored independently), and active pulldown (RPULLDOWN = 36 Ω) for controlled output discharge. The SENSE pin enables remote feedback to compensate for PCB trace resistance, critical for high-accuracy point-of-load regulation.

Key Specifications

Pinout & Package

TPS7A1412PYBKR is packaged in a 0.71 mm × 1.16 mm, 6-bump WCSP (YBK) with bottom-side solder balls. The ultra-compact footprint targets high-density portable designs where board area is constrained.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A1412PYBKR, the TPS7A1612DRVR trades WCSP size and SENSE capability for improved thermal dissipation, while the NCP114AMX12T2G sacrifices current, accuracy, and architectural flexibility for minimal footprint and cost - making TPS7A1412PYBKR uniquely suited for high-density, high-precision LILO applications.

Availability

TPS7A1412PYBKR 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 TPS7A1412PYBKR 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 LDO innovation focused on power integrity and energy efficiency.

The TPS7A14 product line was designed specifically for ultra-low-input-voltage, ultra-low-output-voltage applications in battery-powered portable electronics - addressing the need for high efficiency, small size, and precision regulation where traditional LDOs fail.

FAQ

What is the minimum input voltage required for TPS7A1412PYBKR to regulate 1.2 V output?

The TPS7A1412PYBKR requires VIN ≥ VOUT + 100 mV (i.e., ≥1.3 V) for full specification compliance, including dropout, accuracy, and PSRR. However, it can operate down to 0.7 V on the IN pin when the BIAS pin is supplied ≥2.2 V - though regulation is not guaranteed below VIN = VOUT + 100 mV per datasheet Section 6.3.

Does TPS7A1412PYBKR require an external capacitor on the BIAS pin?

Yes - a minimum 0.1 µF ceramic capacitor is recommended from BIAS to GND per Section 6.3. While not required for stability, this capacitor maintains transient response, PSRR, and noise performance. For best results, use ≥0.47 µF placed adjacent to the BIAS pin per Section 5.1.

Can the SENSE pin of TPS7A1412PYBKR be left unconnected?

No - the SENSE pin must be connected either to the OUT pin (for local sensing) or directly to the load (for remote sensing). Leaving it floating violates the absolute maximum rating (VSENSE ≤ VIN + 0.3 V) and risks instability or inaccurate regulation due to undefined feedback node impedance.

How does the active discharge function work in TPS7A1412PYBKR?

The TPS7A1412PYBKR activates an internal 36-Ω pulldown resistor from OUT to GND when disabled (EN low), during BIAS/IN UVLO, or in thermal shutdown. Discharge time depends on COUT and parallel load resistance; for example, with 10 µF COUT and no load, t ≈ 0.35 × R × C = 126 µs - ensuring rapid, deterministic reset behavior.

Is TPS7A1412PYBKR compatible with ceramic output capacitors having ESR below 10 mΩ?

Yes - the TPS7A1412PYBKR is explicitly designed for low-ESR ceramic capacitors. Section 6.3 specifies COUT = 2.2–47 µF with ESR ≤ 100 mΩ; typical 0402/0603 X7R ceramics (ESR < 5 mΩ) are fully supported and improve transient response versus higher-ESR alternatives.