Texas Instruments TPS7A0512PDQNR

Overview

TPS7A0512PDQNR from Texas Instruments is a 1.2-V fixed-output, ultralow-quiescent-current (1 µA typ) low-dropout regulator in a 1.0-mm × 1.0-mm X2SON-4 package, delivering up to 200 mA with 235 mV max dropout at full load and ±1% output accuracy over temperature - designed for battery-powered wearables and always-on subsystems.

For engineers reviewing the TPS7A0512PDQNR datasheet, TPS7A0512PDQNR pinout, TPS7A0512PDQNR application, or TPS7A0512PDQNR equivalent, this page delivers verified electrical specs, validated package mapping, confirmed thermal performance (R_θJA = 144.1°C/W), active output discharge capability, and real-world transient response data for Li-SOCl₂, Li-MnO₂, and multi-cell alkaline battery systems.

Technical Context

The TPS7A0512PDQNR employs a PMOS pass transistor architecture enabling ultralow IQ operation without compromising transient response - achieving <±10 mV output deviation during 0–200 mA load steps with 3.3 mA/µs slew rate. Its internal foldback current limit and thermal shutdown (160°C trip) provide robust fault protection under overload or ambient stress.

It integrates an active pulldown circuit for rapid output discharge when disabled (VEN < 0.4 V), supports input voltages from 1.4 V to 5.5 V, and remains stable with ≥0.47 µF ceramic output capacitance - eliminating need for ESR-tuned capacitors common in older LDO designs.

Key Specifications

Pinout & Package

TPS7A0512PDQNR is housed in a 1.0-mm × 1.0-mm, 4-pin X2SON (DQN) package with wettable flanks for automated optical inspection. The thermal pad is electrically isolated and must be connected to PCB ground for optimal thermal performance (R_θJB = 83.5°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A0512PDQNR, the TPS7A0512PDBVR offers identical regulation performance in a larger, more manufacturable package, while the MCP1700T-1202E/TT trades off critical features (EN, discharge, low dropout) for lower unit cost - making the DQNR variant optimal for space- and battery-life-critical designs.

Availability

TPS7A0512PDQNR is available at Aetrix Electronics and suitable for wearable electronics, smart metering modules, and industrial IoT edge nodes requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for TPS7A0512PDQNR 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and consumer markets.

The TPS7A05 family was engineered specifically for ultra-low-power, battery-operated applications demanding nanoscale IQ, small footprint, and robust transient response - targeting wearables, remote sensors, and always-on subsystems.

FAQ

What is the maximum input voltage rating for TPS7A0512PDQNR?

The absolute maximum input voltage for TPS7A0512PDQNR is 6.0 V. However, the recommended operating range is 1.4 V to 5.5 V. Exceeding 5.5 V may trigger internal UVLO or cause reliability degradation over time, even if within absolute max ratings. Always maintain VIN ≤ 5.5 V in normal operation for TPS7A0512PDQNR.

Does TPS7A0512PDQNR require an external pull-up resistor on the EN pin?

No - TPS7A0512PDQNR does not require an external pull-up on EN. When unused, the EN pin must be connected directly to IN to ensure reliable enablement. Its leakage current is only 10 nA, so it imposes negligible load on the input rail. Adding a pull-up resistor risks violating V_EN(HI) specification if VIN is near minimum.

Can TPS7A0512PDQNR operate from a single Li-SOCl₂ cell?

Yes - TPS7A0512PDQNR supports input voltages as low as 1.4 V and has a 235 mV dropout at 200 mA. Since a fresh Li-SOCl₂ cell starts at ~3.6 V and discharges to ~2.0 V, and the 1.2-V output requires only 1.435 V minimum input, TPS7A0512PDQNR remains functional across the full usable cell voltage range.

Is the thermal pad on TPS7A0512PDQNR electrically connected to GND?

No - the thermal pad on TPS7A0512PDQNR is electrically isolated. It must be soldered to a large-area PCB ground plane solely for thermal conduction (R_θJB = 83.5°C/W). Connecting it to any other net will compromise thermal performance and may violate internal isolation design.

What output capacitor value is required for stability with TPS7A0512PDQNR?

TPS7A0512PDQNR is stable with a minimum 0.47 µF ceramic capacitor on the OUT pin. TI recommends using 1 µF for optimal transient response and PSRR. Larger values (up to 22 µF) are acceptable and improve load-step immunity, but ESR is not a stability factor - unlike older LDOs, no minimum ESR is required.