Texas Instruments TPS7A1112PDRVR

Overview

TPS7A1112PDRVR from Texas Instruments is a 500-mA ultra-low dropout linear regulator (LDO) with dual-input architecture (IN and BIAS pins), supporting input voltages as low as 0.75 V and output voltages down to 0.5 V. It delivers 1.5% output accuracy over load, line, and temperature (–40°C to +125°C), achieves 140 mV max dropout at 500 mA in the DRV package, and draws only 1.6 µA typical quiescent current on the IN pin - enabling high-efficiency power delivery to ultra-low-voltage cores in battery-powered wearables and sensor nodes.

For engineers reviewing the TPS7A1112PDRVR datasheet, TPS7A1112PDRVR pinout, TPS7A1112PDRVR application, or TPS7A1112PDRVR equivalent, this page provides verified package mapping (WSON-6), confirmed pin functions (IN/OUT/GND/EN/BIAS/NC), validated LILO (low-input, low-output) operation constraints, and real-world design implications of its dual-rail biasing, active discharge, and sub-1-V operation capability.

Technical Context

The TPS7A1112PDRVR implements a dual-supply LDO architecture where the IN pin supplies power to the pass element while the BIAS pin powers internal control circuitry - decoupling regulation performance from ultra-low VIN constraints. This enables stable 0.5–3.0 V outputs even when VIN is only 140 mV above VOUT, provided VBIAS remains within 1.7–5.5 V.

It integrates global UVLO (with independent rising/falling thresholds on both IN and BIAS rails), foldback current limiting (700–1250 mA depending on package), thermal shutdown (160°C trip), and an active pulldown circuit (120 Ω) for controlled output discharge during disable or fault conditions - all optimized for space- and power-constrained portable electronics.

Key Specifications

Pinout & Package

TPS7A1112PDRVR is housed in a 2.00-mm × 2.00-mm WSON-6 package (DRV) with exposed thermal pad. Pin 1 = OUT, Pin 2 = NC (no internal connection), Pin 3 = EN, Pin 4 = BIAS, Pin 5 = GND, Pin 6 = 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 TPL7407LPGEDR and TPS7A0512PDBVR, the TPS7A1112PDRVR uniquely supports true LILO operation (0.75 V IN → 1.2 V OUT) via dedicated BIAS rail, delivers 2.5× higher current than TPS7A0512PDBVR, and provides active discharge - making it the only viable choice for next-gen ultra-low-power microcontroller cores.

Availability

TPS7A1112PDRVR is available at Aetrix Electronics and suitable for smart wearables, portable medical sensors, and ultra-compact SSDs requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for TPS7A1112PDRVR 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, low-power power conversion solutions.

The TPS7A11 family was engineered specifically for battery-powered edge devices demanding sub-1-V operation, ultra-low quiescent current, and robust transient immunity - targeting wearables, hearables, and IoT endpoints where every microamp and millivolt matters.

FAQ

What is the exact output voltage of the TPS7A1112PDRVR?

The TPS7A1112PDRVR is a fixed-output variant delivering 1.2 V nominal. Its accuracy is ±1.5% over load, line, and temperature (–40°C to +125°C), meaning actual output remains within 1.182 V to 1.218 V under all specified operating conditions. This tolerance is guaranteed by TI's production testing and applies to both DRV and YKA packages.

Can the TPS7A1112PDRVR operate without the BIAS pin connected?

No - the TPS7A1112PDRVR requires a valid 1.7–5.5 V supply on the BIAS pin to power internal control circuitry. Leaving BIAS unconnected or below 1.46 V (rising threshold) prevents regulation, as the global UVLO blocks enablement. The device will remain disabled even if IN and EN are valid, because both rails must satisfy UVLO simultaneously.

What is the minimum input voltage required for 500 mA output from the TPS7A1112PDRVR?

For 500 mA output, the TPS7A1112PDRVR requires VIN ≥ VOUT + 140 mV = 1.34 V (since VOUT = 1.2 V). This is the maximum dropout specification for the DRV package at full load and TJ = 125°C. At room temperature and lighter loads, dropout may be lower, but 1.34 V is the guaranteed minimum VIN for rated current.

Does the TPS7A1112PDRVR include thermal protection?

Yes - the TPS7A1112PDRVR incorporates thermal shutdown with a trip point of 160°C (rising) and hysteresis that resets at 145°C (falling). When junction temperature exceeds 160°C, the device disables output and activates the active pulldown circuit to discharge VOUT. Recovery occurs only after die temperature falls below 145°C and EN remains asserted.

Is the NC pin on the TPS7A1112PDRVR required to be grounded?

No - Pin 2 (NC) has no internal connection and may be left floating. However, TI recommends connecting it to GND to improve thermal dissipation through enhanced heat conduction from the die to the PCB ground plane, especially in high-ambient or high-power-density layouts.