Texas Instruments TPS7A1106PDRVT

Overview

TPS7A1106PDRVT 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 fixed 0.6-V output. 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 operates with only 1.6 µA typical IN-quiescent current - enabling high-efficiency power delivery to sub-1-V core rails in battery-constrained wearables and sensor nodes.

For engineers reviewing the TPS7A1106PDRVT datasheet, TPS7A1106PDRVT pinout, TPS7A1106PDRVT application, or TPS7A1106PDRVT equivalent, key selection criteria include its LILO (low-input/low-output) capability, BIAS-rail dependency for stable regulation below 1 V, active output discharge function, thermal shutdown behavior, and WSON-6 package layout compatibility with space-sensitive PCBs.

Technical Context

The TPS7A1106PDRVT implements a dual-rail LDO architecture where the IN pin supplies power to the pass element while the BIAS pin powers internal control circuitry - decoupling regulation stability from ultra-low VIN constraints. This enables operation with VIN as low as 0.75 V (≥140 mV above VOUT) when VBIAS ≥1.7 V.

It integrates global UVLO (with independent rising/falling thresholds on IN and BIAS pins), foldback current limiting (990 mA typical for DRV package), thermal shutdown (160°C trip), and an enable-controlled active pulldown circuit (120 Ω) for rapid output discharge - all within a 2.0 mm × 2.0 mm WSON-6 package with exposed thermal pad.

Key Specifications

Pinout & Package

TPS7A1106PDRVT is housed in a 2.0-mm × 2.0-mm, 6-pin WSON package (DRV) with exposed thermal pad. The thermal pad must be connected to a large-area ground plane per TI layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A1106PDRVT, the TPS7A1112PDRVT offers identical form-factor and performance but targets 1.2-V loads, while the TPS7A16A-Q1 provides automotive qualification at the cost of 30% lower current capability and 43% higher dropout - making the TPS7A1106PDRVT optimal for high-efficiency, high-current, consumer-grade 0.6-V core regulation.

Availability

TPS7A1106PDRVT is available at Aetrix Electronics and suitable for smart wearables, camera modules, and portable medical devices requiring stable component supply with full traceability and lifecycle management.

Supply support for TPS7A1106PDRVT 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 connectivity technologies, with decades of LDO design expertise for power management ICs.

The TPS7A11 family was engineered specifically for ultra-low-voltage, ultra-low-power applications - targeting battery-operated devices that demand sub-1-V regulation, nanoscale quiescent current, and minimal dropout under dynamic load conditions.

FAQ

What is the exact output voltage of the TPS7A1106PDRVT?

The TPS7A1106PDRVT is a fixed-output LDO with a nominal output voltage of 0.6 V. Its accuracy is guaranteed at ±1.5% over load, line, and temperature (–40°C to 125°C), meaning the actual output remains within 0.591 V to 0.609 V under specified operating conditions. This precision eliminates need for external feedback resistors and simplifies layout in space-constrained designs using the TPS7A1106PDRVT.

Does the TPS7A1106PDRVT require both IN and BIAS supplies to operate?

Yes - the TPS7A1106PDRVT requires both IN (0.75–3.3 V) and BIAS (1.7–5.5 V) supplies to regulate correctly. The IN rail powers the pass element, while BIAS powers internal control circuitry. If either rail falls below its UVLO threshold (675 mV for IN, 1.54 V for BIAS), the device shuts down. This dual-rail architecture enables stable 0.6-V output even when IN is as low as 0.75 V - a capability not possible with single-supply LDOs.

What is the purpose of the NC pin on the TPS7A1106PDRVT WSON package?

The NC (No Connect) pin (Pin 2) on the TPS7A1106PDRVT has no internal connection and serves no electrical function. Texas Instruments recommends connecting it to ground to improve thermal dissipation through enhanced heat conduction to the PCB ground plane - especially important in high-ambient-temperature or high-current applications. Leaving it floating is acceptable but yields slightly higher junction temperature.

Can the TPS7A1106PDRVT be used without the EN pin connected?

Yes - the EN pin can be tied directly to the IN or BIAS rail if enable functionality is not needed. However, TI specifies that connecting EN to IN is only valid when VIN > 0.9 V; otherwise, connect EN to BIAS. This ensures reliable startup and avoids unintended disable states. The TPS7A1106PDRVT will remain enabled as long as EN voltage exceeds 0.9 V (typical), and will fully disable with active discharge when EN falls below 0.4 V.

How does the active discharge feature work on the TPS7A1106PDRVT?

The TPS7A1106PDRVT includes an internal 120-Ω pulldown resistor activated when the device is disabled (EN ≤ 0.4 V) or enters thermal shutdown. This rapidly discharges the output capacitance to ensure a known low-voltage state for downstream logic. Discharge time depends on C_OUT and parallel load resistance per t = 120·R_L/(120 + R_L)·C_OUT. Reverse current from OUT to IN must be limited to <5% of rated current to prevent damage - a constraint explicitly defined in the TPS7A1106PDRVT datasheet.