Texas Instruments TPS7A14105PDRVR

Overview

TPS7A14105PDRVR from Texas Instruments is a 1-A ultra-low-dropout linear regulator (LDO) designed for low-voltage, high-efficiency power delivery in battery-powered systems. It operates with input voltage as low as 0.7 V, delivers fixed 1.05 V output with ±1% accuracy over –40°C to +125°C, and achieves 70 mV max dropout at 1 A load. Its dual-rail architecture uses IN (0.7–2.2 V) and BIAS (2.2–5.5 V) supplies to enable stable regulation in LILO (low-input, low-output) applications such as camera modules and wearables.

For engineers reviewing the TPS7A14105PDRVR datasheet, TPS7A14105PDRVR pinout, TPS7A14105PDRVR application, or TPS7A14105PDRVR equivalent, key selection considerations include its 70-mV dropout at 1 A, active output discharge, SENSE pin for remote sensing, 80-dB PSRR at 1 kHz, and WSON-6 (2 mm × 2 mm) package with exposed thermal pad.

Technical Context

The TPS7A14105PDRVR implements a dual-supply LDO architecture where the IN pin carries 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 operation when VIN is only 100 mV above VOUT. This decoupling allows high PSRR (80 dB @ 1 kHz, 500 mA) and fast load transient response (±20 mV for 3 mA → 600 mA in 20 µs).

It integrates global UVLO (IN and BIAS monitored independently via AND logic), foldback current limiting (ICL = 1.035–2.45 A, ISC = 600 mA), thermal shutdown (165°C trip, 140°C reset), and active pulldown (RPULLDOWN = 36 Ω) for controlled output discharge. The SENSE pin enables Kelvin sensing to compensate for PCB trace resistance between OUT and load.

Key Specifications

Pinout & Package

TPS7A14105PDRVR is housed in a 6-pin WSON package (DRV variant) measuring 2 mm × 2 mm with an exposed thermal pad electrically connected to GND. The thermal pad must be soldered to a PCB ground plane for optimal thermal performance (RθJA = 72.7°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A14105PDRVR, TPS7A16105DRVR trades current capability and dual-rail flexibility for smaller size and lower quiescent current, while NCP114AMX105TCG offers lower cost and footprint at the expense of PSRR, dropout, and advanced features-making TPS7A14105PDRVR the only option supporting 1-A LILO regulation with SENSE and active discharge.

Availability

TPS7A14105PDRVR is available at Aetrix Electronics and suitable for camera modules, wireless earbuds, smart watches, SSDs, and portable medical devices requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS7A14105PDRVR 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 TPS7A14 product line was designed specifically for ultra-low-input, ultra-low-output voltage regulation in battery-powered devices-enabling high efficiency and precision where traditional LDOs fail due to insufficient headroom.

FAQ

What is the minimum input voltage required for TPS7A14105PDRVR to regulate 1.05 V?

The TPS7A14105PDRVR requires VIN ≥ VOUT + 100 mV under recommended operating conditions, so minimum functional input is 1.15 V. However, absolute minimum VIN is 0.7 V - regulation is not guaranteed below 1.15 V, though the device remains powered if BIAS is valid. Dropout voltage is specified at 70 mV (max) for 1 A load at TJ ≤ +85°C, confirming stable operation at VIN = 1.15 V.

Does TPS7A14105PDRVR require an external BIAS supply, and what happens if it's omitted?

Yes, TPS7A14105PDRVR requires a valid BIAS supply (2.2–5.5 V) to power internal reference and control circuitry. If BIAS is absent or below UVLO (1.15 V rising), the device disables regardless of IN and EN status due to global UVLO. Omitting BIAS prevents regulation - the LDO will not turn on even with proper VIN and EN, making BIAS mandatory for operation.

How does the SENSE pin improve regulation accuracy in TPS7A14105PDRVR?

The SENSE pin on TPS7A14105PDRVR provides remote feedback by connecting directly to the load's VDD node, bypassing PCB trace resistance between OUT and load. This eliminates voltage drop errors - for example, a 100-mΩ trace carrying 1 A would cause 100 mV error without SENSE, degrading the ±1% accuracy. With SENSE, regulation is maintained at the load, not at the IC's OUT pin.

Is active output discharge available on all TPS7A14105PDRVR units, and how is it implemented?

Active output discharge is implemented only on the "P" version of the TPS7A14 family (e.g., TPS7A14105PDRVR). It uses an internal 36-Ω MOSFET pulldown resistor activated when EN is low, IN or BIAS falls below UVLO, or thermal shutdown triggers. Discharge time depends on COUT and parallel load resistance; for a typical 10-µF output cap and no load, discharge to 10% VOUT takes ~350 µs.

What thermal derating applies to TPS7A14105PDRVR in its WSON-6 package?

In the WSON-6 (DRV) package, TPS7A14105PDRVR has RθJA = 72.7°C/W. At 1 A load with VIN = 1.15 V and VOUT = 1.05 V (100-mV drop), power dissipation is 100 mW. With 25°C ambient, junction temperature rise is ~7.3°C - well within the –40°C to +125°C operating range. For higher VIN–VOUT differentials or elevated ambient, thermal pad soldering to a 2-layer 1-in² GND copper area is essential to maintain reliability.