Texas Instruments TPS7A11105PDRVR

Overview

TPS7A11105PDRVR from Texas Instruments is a 500-mA, ultra-low dropout linear regulator (LDO) with dual-rail input architecture (IN + BIAS), fixed 1.05-V output, 0.75-V minimum input voltage, 140-mV max dropout at 500 mA (DRV package), and 1.6-µA typical input quiescent current. It powers core rails of ultra-low-voltage MCUs and analog sensors in space-constrained portable electronics.

For engineers reviewing the TPS7A11105PDRVR datasheet, TPS7A11105PDRVR pinout, TPS7A11105PDRVR application, or TPS7A11105PDRVR equivalent, this page delivers verified electrical specs, DRV-package pin functions, LILO (low-input/low-output) operation context, active discharge behavior, and direct alternatives for battery-powered wearable and imaging systems.

Technical Context

The TPS7A11105PDRVR implements a dual-supply LDO architecture: the IN pin supplies power to the pass element while the BIAS pin powers internal control circuitry, enabling stable regulation down to 0.5 V output from as low as 0.75 V input. Its global UVLO combines independent rising/falling thresholds on both IN (675 mV / 600 mV) and BIAS (1.54 V / 1.44 V) rails via AND logic to prevent premature turn-on.

It features foldback current limiting (990 mA typ. for DRV package), thermal shutdown (160°C trip), and an active pulldown circuit (120-Ω resistor) that discharges the output when disabled-enabled only in P-version devices like TPS7A11105PDRVR. Transient response is optimized by low output impedance and high PSRR (64 dB @ 1 kHz).

Key Specifications

Pinout & Package

TPS7A11105PDRVR is housed in a 2.00-mm × 2.00-mm WSON-6 (DRV) package with exposed thermal pad. Pin 1 (OUT) is top-left; pin 6 (IN) is bottom-right. Thermal pad must be connected to GND for thermal performance and EMI control.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A11105PDRVR, the 1.00-V and 1.20-V variants maintain identical thermal, transient, and enable/discharge behavior but shift output setpoint - making them drop-in replacements only when board-level V_OUT tolerance and downstream voltage ratings align.

Availability

TPS7A11105PDRVR is available at Aetrix Electronics and suitable for smart wearables, camera modules, and portable medical devices requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS7A11105PDRVR 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 U.S.-based semiconductor company specializing in analog, embedded processing, and power management ICs, with leadership in high-efficiency, low-power, and precision power solutions.

The TPS7A11 family was designed specifically for ultra-low-voltage, battery-powered applications demanding LILO operation, nanoscale packaging, and sub-2-µA quiescent current - targeting next-generation wearables, hearables, and imaging subsystems.

FAQ

What is the exact output voltage of TPS7A11105PDRVR?

The TPS7A11105PDRVR provides a factory-trimmed fixed output voltage of 1.05 V with ±1.5% accuracy over –40°C to 125°C, load (1–500 mA), and line (VIN = VOUT + 0.5 V to 3.3 V). This tolerance ensures reliable operation for 1.0-V–1.1-V core domains without external feedback components.

Does TPS7A11105PDRVR support ultra-low input voltages below 1.0 V?

Yes. TPS7A11105PDRVR operates with input voltages as low as 0.75 V when used with its dedicated BIAS supply (1.7–5.5 V). This LILO capability allows regulation of 1.05 V output even when VIN drops to 0.85 V - critical for maintaining function during deep battery discharge in wearables.

Is active output discharge available on TPS7A11105PDRVR?

Yes. TPS7A11105PDRVR (P-version) includes an internal 120-Ω pulldown resistor activated upon EN assertion low or thermal shutdown. This ensures rapid, controlled discharge of the output node - eliminating floating states and simplifying power sequencing in multi-rail systems.

What capacitor values are required for stable operation of TPS7A11105PDRVR?

TPS7A11105PDRVR requires a minimum 2.2-µF ceramic input capacitor (CIN), 2.2–22-µF ceramic output capacitor (COUT) with ESR < 250 mΩ, and 0.1-µF ceramic bias capacitor (CBIAS). All capacitors must be placed as close as possible to their respective pins to ensure stability and optimal transient response.

How does the dual-rail architecture of TPS7A11105PDRVR improve efficiency?

The dual-rail architecture separates the high-current pass path (IN) from low-current control logic (BIAS), allowing TPS7A11105PDRVR to sustain regulation at VIN levels far below VOUT - e.g., 0.85 V IN delivering 1.05 V OUT - while maintaining 1.6-µA I_Q(IN). This avoids efficiency collapse seen in single-rail LDOs under LILO conditions.