Texas Instruments TPS7A1111PDRVR

Overview

TPS7A1111PDRVR from Texas Instruments is a 500-mA ultra-low dropout linear regulator (LDO) with dual-supply architecture (IN + BIAS), supporting input as low as 0.75 V and output down to 0.5 V at ±1.5% accuracy over load, line, and temperature. It delivers 140 mV max dropout at 500 mA in the DRV package and features 1.6 µA typical IN quiescent current-optimized for powering core rails of modern MCUs and analog sensors in space-constrained, battery-powered systems.

For engineers reviewing the TPS7A1111PDRVR datasheet, TPS7A1111PDRVR pinout, TPS7A1111PDRVR application, or TPS7A1111PDRVR equivalent, key selection considerations include its LILO (low-input/low-output) capability enabled by separate IN/BIAS rails, active output discharge, thermal shutdown (160°C), and compatibility with ceramic capacitors ≥2.2 µF on IN/OUT and ≥0.1 µF on BIAS.

Technical Context

The TPS7A1111PDRVR implements a dual-rail 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 only 140 mV above VOUT. This decoupling allows operation with sub-bandgap input sources (e.g., DC/DC outputs or partially discharged batteries) without sacrificing PSRR (64 dB @ 1 kHz) or transient response.

It integrates global UVLO (with independent rising/falling thresholds on IN and BIAS pins), foldback current limiting (up to 1.25 A peak), thermal shutdown with 15°C hysteresis, and an active pulldown circuit (120 Ω) for controlled output discharge during disable-features confirmed for the DRV (WSON-6) package variant.

Key Specifications

Pinout & Package

The TPS7A1111PDRVR is housed in a 2.00-mm × 2.00-mm WSON-6 (DRV) package with exposed thermal pad. Pin 1 (OUT) and Pin 6 (IN) are diagonally opposite; Pin 5 (GND) connects to the thermal pad for optimal thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A1111PDRVR, TPS7A0511PDBVR offers lower quiescent current but sacrifices LILO capability and output current, while NCP163AMX110TBG provides marginally lower dropout at reduced current and lacks critical safety features like thermal shutdown and active discharge.

Availability

TPS7A1111PDRVR is available at Aetrix Electronics and suitable for smart wearables, portable medical devices, and solid-state drives requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS7A1111PDRVR 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, embedded processing, and power management ICs, with decades of expertise in high-reliability, high-performance power solutions.

The TPS7A11 family was designed specifically for ultra-low-voltage, ultra-low-power applications in battery-operated devices-emphasizing LILO operation, nanoscale quiescent current, and robust transient response in sub-2-mm² packages.

FAQ

What is the fixed output voltage of the TPS7A1111PDRVR?

The TPS7A1111PDRVR delivers a factory-trimmed fixed output voltage of 1.1 V, with ±1.5% accuracy over load, line, and temperature (–40°C to +125°C). This value is laser-trimmed during production and does not require external feedback components-ensuring consistent performance across units and simplifying layout in space-constrained designs.

Can the TPS7A1111PDRVR operate with an input voltage lower than its output voltage?

No-the TPS7A1111PDRVR is a linear regulator and cannot boost voltage. However, its dual-supply architecture allows the IN pin to operate as low as 0.75 V (even below 1.1 V output) when the BIAS pin is supplied with 1.7–5.5 V. In this configuration, regulation is maintained because BIAS powers the control circuitry while IN feeds the pass element.

Does the TPS7A1111PDRVR require external capacitors, and what values are recommended?

Yes-TPS7A1111PDRVR requires three external ceramic capacitors: ≥2.2 µF on IN-to-GND, ≥2.2 µF on OUT-to-GND (max ESR 250 mΩ), and ≥0.1 µF on BIAS-to-GND. These values ensure stability, optimal transient response, and PSRR performance per TI's validated design guidelines in SBVS316B.

Is active output discharge available on the TPS7A1111PDRVR, and how does it function?

Yes-the TPS7A1111PDRVR includes active output discharge via an internal 120-Ω pulldown resistor connected to GND when EN is low or thermal shutdown activates. Discharge time depends on C_OUT and parallel load resistance per t = 120·R_L/(120 + R_L)·C_OUT. This feature ensures defined power-down states for downstream logic and eliminates need for external discharge circuitry.

What are the absolute maximum ratings for the TPS7A1111PDRVR's IN and BIAS pins?

The TPS7A1111PDRVR has absolute maximum ratings of –0.3 V to 3.6 V on the IN pin and –0.3 V to 6.0 V on the BIAS pin. Exceeding these voltages-even momentarily-may cause permanent damage. Recommended operating ranges are narrower: IN = 0.75–3.3 V and BIAS = 1.7–5.5 V, as specified in Section 6.3 of the datasheet.