Texas Instruments TPS7A0322PDQNR

Overview

TPS7A0322PDQNR from Texas Instruments is an ultra-low quiescent current (200nA typ) 200mA low-dropout linear regulator with fixed 2.2V output, 1.5% accuracy over temperature, and fast transient response (<10µs settling time, 80mV undershoot). It operates from 1.5V to 6.0V input and maintains ultra-low IQ even in dropout-enabling multi-year battery life in always-on IoT sensors and medical wearables.

For engineers reviewing the TPS7A0322PDQNR datasheet, TPS7A0322PDQNR pinout, TPS7A0322PDQNR application, or TPS7A0322PDQNR equivalent, this page delivers verified electrical specs, package-validated pin functions, real-world use cases in energy-constrained systems, and two confirmed alternative LDOs with documented functional trade-offs for design flexibility.

Technical Context

The TPS7A0322PDQNR implements a smart enable architecture with an internal pulldown resistor (500kΩ typ at VEN = 0.3V) that ensures reliable disable state when EN floats-eliminating external pull-down components. Its internal reference and error amplifier are optimized for stability with ≥1µF ceramic output capacitance.

Transient performance is achieved via high-gain, low-phase-margin compensation tuned for rapid load-step recovery: 1mA→50mA steps settle in <10µs with ≤80mV undershoot at VOUT = 2.2V, while dropout voltage remains ≤270mV max at 200mA (VOUT = 3.3V), scaled per output voltage.

Key Specifications

Pinout & Package

TPS7A0322PDQNR is packaged in a 1.0mm × 1.0mm, 4-pin X2SON (DQN) package with exposed thermal pad internally connected to GND. The compact footprint supports high-density PCB layouts in space-constrained wearables and metering modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-quiescent-current LDO applications.

Compared with TPS7A0322PDQNR, TPS7A0222PDQNR trades 8× lower IQ for 50% lower current capability and higher cost, while MCP1703T-2202E/MB offers higher output current and lower unit price but sacrifices nanopower operation and integrated EN logic-requiring additional layout and component overhead.

Availability

TPS7A0322PDQNR is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, and residential circuit protection systems requiring stable component supply, long-term lifecycle support, and guaranteed nanopower performance.

Supply support for TPS7A0322PDQNR 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 and embedded processing technologies, with decades of expertise in precision power management ICs.

The TPS7A03 family is designed for ultra-low-power, battery-operated applications-including medical wearables, smart meters, and industrial IoT endpoints-where nanoscale quiescent current and robust transient response are mandatory.

FAQ

What is the maximum output current capability of the TPS7A0322PDQNR?

The TPS7A0322PDQNR delivers up to 200mA continuous output current. Its internal current limit is specified at 240–750mA depending on output voltage and input conditions, providing robust short-circuit and overload protection. At 200mA and VOUT = 2.2V, dropout remains ≤270mV (max) across temperature, enabling reliable operation from marginal input sources like aging coin cells.

Does the TPS7A0322PDQNR require an external pull-down resistor on the EN pin?

No, the TPS7A0322PDQNR features a smart enable circuit with an integrated 500kΩ pulldown resistor on the EN pin. This ensures the device remains disabled when EN is left floating-eliminating the need for external components. The resistor disconnects automatically when EN is driven high, minimizing leakage current during active operation.

What output capacitor value is required for stability with the TPS7A0322PDQNR?

The TPS7A0322PDQNR is stable with a minimum 1µF ceramic output capacitor. While 0.5µF is the absolute minimum for basic stability, TI specifies ≥1µF for guaranteed fast transient response (<10µs) and optimal PSRR. Larger values (up to 22µF) are permissible but do not improve stability margins beyond the 1µF baseline.

How does the TPS7A0322PDQNR perform under cold-temperature conditions?

The TPS7A0322PDQNR is fully specified from –40°C to +125°C. Output accuracy remains within ±1.5% across this range, dropout voltage increases predictably (e.g., 310mV max at 3.3V output, –40°C to +125°C), and quiescent current stays near 200nA down to –40°C-making it suitable for outdoor metering and automotive cabin applications.

Can the TPS7A0322PDQNR be used with lithium coin cells such as CR2032?

Yes, the TPS7A0322PDQNR is ideal for CR2032-powered systems. Its 1.5V minimum input voltage aligns with the CR2032's discharge curve (2.0–3.0V), its 200nA quiescent current enables multi-year operation, and its 2.2V fixed output matches common low-power MCU core voltages. The 3nA shutdown current further extends shelf life in sealed devices.