Texas Instruments TPS7A1115PDRVR

Overview

TPS7A1115PDRVR from Texas Instruments is a 500-mA ultra-low dropout LDO regulator with dual-rail input architecture (IN + BIAS), supporting 0.75 V to 3.3 V input and fixed 1.5-V output. It delivers 1.5% accuracy over load, line, and temperature, achieves 140-mV max dropout at 500 mA in the DRV package, and operates with only 1.6 µA IN-pin quiescent current - ideal for powering low-voltage MCU cores and analog sensors in space-constrained portable electronics.

For engineers reviewing the TPS7A1115PDRVR datasheet, TPS7A1115PDRVR pinout, TPS7A1115PDRVR application, or TPS7A1115PDRVR equivalent, key selection criteria include its LILO (low-input/low-output) capability enabled by separate IN/BIAS rails, active output discharge, thermal shutdown at 160°C, and compatibility with ceramic capacitors as small as 2.2 µF on IN and OUT.

Technical Context

The TPS7A1115PDRVR implements a dual-supply LDO architecture where the IN pin supplies power to the pass element while the BIAS pin powers internal control circuitry - enabling stable regulation even when VIN is as low as 0.75 V and VOUT is as low as 1.5 V. Its global UVLO combines independent rising/falling thresholds on both IN (675 mV / 600 mV) and BIAS (1.54 V / 1.44 V) to prevent erratic startup.

It features foldback current limiting (990 mA typical for DRV package), active pulldown discharge via a 120-Ω switch (P-version only), and high PSRR (64 dB @ 1 kHz) achieved through high-input-impedance error amplification and low-output-impedance pass transistor design - critical for noise-sensitive analog and RF subsystems.

Key Specifications

Pinout & Package

TPS7A1115PDRVR is housed in a 2.00-mm × 2.00-mm WSON-6 (DRV) package with exposed thermal pad. Pin 1 is OUT; Pin 2 is NC (no internal connection); Pin 3 is EN; Pin 4 is BIAS; Pin 5 is GND; Pin 6 is IN. TI recommends connecting the thermal pad to a large-area ground plane for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A1115PDQNR, the TPS7A1115PDRVR offers superior thermal performance (77.3°C/W vs 169.4°C/W R_θJA) and higher current capability in a larger but more manufacturable package; versus TPS7A0515PDBVR, it enables true LILO operation and provides critical active discharge for system-level power sequencing.

Availability

TPS7A1115PDRVR is available at Aetrix Electronics and suitable for smart wearables, portable medical devices, camera modules, and SSD controllers requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for TPS7A1115PDRVR 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 design expertise and broad automotive, industrial, and personal electronics portfolio.

The TPS7A11 family was engineered specifically for ultra-low-power, ultra-low-voltage portable systems - addressing the demand for LILO regulation, nanoscale packaging, and sub-µA quiescent current in next-generation wearables and IoT edge nodes.

FAQ

What is the fixed output voltage of the TPS7A1115PDRVR?

The TPS7A1115PDRVR is factory-configured for a precise 1.5-V output voltage with ±1.5% total accuracy over load, line, and temperature (–40°C to +125°C). This fixed setting eliminates external feedback components and simplifies layout for applications requiring strict 1.5-V core or I/O rail compliance.

Does the TPS7A1115PDRVR require an external BIAS supply to operate?

Yes - the TPS7A1115PDRVR requires a separate BIAS supply between 1.7 V and 5.5 V to power its internal control circuitry. This dual-rail architecture enables regulation even when the IN voltage drops below 1.7 V (e.g., down to 0.75 V), making the TPS7A1115PDRVR uniquely capable of LILO operation.

Can the TPS7A1115PDRVR be used without connecting the EN pin?

Yes - if enable functionality is not needed, the EN pin of the TPS7A1115PDRVR must be tied to either IN or BIAS. However, connecting EN to IN is only valid when VIN exceeds 0.9 V; otherwise, tie EN to BIAS to guarantee reliable turn-on under all operating conditions.

What is the purpose of the NC pin on the TPS7A1115PDRVR?

The NC (No Connect) pin on the TPS7A1115PDRVR (Pin 2) has no internal connection. TI recommends grounding it to improve thermal dissipation through the package body, though leaving it floating is electrically acceptable if thermal performance is sufficient for the application's 500-mA load.

How does the active discharge feature work on the TPS7A1115PDRVR?

The TPS7A1115PDRVR (P-version) integrates a 120-Ω pulldown resistor activated when EN is driven low or during thermal shutdown. This rapidly discharges the output capacitance, ensuring a defined low state for downstream logic - critical for safe power sequencing in multi-rail systems where uncontrolled VOUT decay could cause latch-up.