Texas Instruments TPS7A0328PDQNR

Overview

TPS7A0328PDQNR from Texas Instruments is a nanopower low-dropout linear regulator (LDO) delivering 200mA output with ultra-low 200nA quiescent current, 1.5% output accuracy over –40°C to +125°C, and 270mV max dropout at 200mA (V_OUT = 3.3V). It supports fixed 2.8V output and operates from 1.5V to 6.0V input, enabling long-life battery operation in space-constrained IoT sensors.

For engineers reviewing the TPS7A0328PDQNR datasheet, TPS7A0328PDQNR pinout, TPS7A0328PDQNR application, or TPS7A0328PDQNR equivalent, this page delivers verified electrical specs, thermal behavior, fast transient response data (<10µs settling), smart enable pulldown functionality, and real-world use cases in wearables, gas meters, and medical monitors - all validated against TI's SBVS375D production datasheet.

Technical Context

The TPS7A0328PDQNR implements a PMOS pass transistor architecture with integrated smart enable circuitry featuring a temperature-stable 500kΩ internal pulldown resistor on EN, eliminating external bias components. Its ultra-low IQ is maintained across full input range and even in dropout mode, ensuring minimal battery drain during deep-sleep states.

Transient performance is optimized via internal compensation stable with ≥1µF ceramic output capacitance; load steps from 1mA to 50mA settle in <10µs with only 80mV undershoot. UVLO (1.23–1.47V rising threshold) and thermal shutdown (170°C) provide robust system-level protection without external supervision.

Key Specifications

Pinout & Package

TPS7A0328PDQNR uses the DQN package: 4-pin X2SON, 1.0mm × 1.0mm body with exposed thermal pad (internally connected to GND). Pin 1 = OUT, Pin 2 = GND, Pin 3 = EN, Pin 4 = IN. Thermal pad must be soldered to PCB ground plane for thermal performance (R_θJB = 116.3°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with TPS7A0328PDQNR, TPS7A0228PDQNR trades 200mA capability for 1/8th IQ, while MCP1703T-2802E/MB offers lower cost and wider availability but sacrifices 17× higher quiescent current and inferior transient response - making TPS7A0328PDQNR optimal for space- and battery-limited 200mA applications requiring <10µs settling.

Availability

TPS7A0328PDQNR is available at Aetrix Electronics and suitable for wearable electronics, smart utility meters, and portable medical devices requiring stable component supply, long-term lifecycle support, and guaranteed traceability for ISO 13485 and IEC 61508 compliance programs.

Supply support for TPS7A0328PDQNR 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 power management ICs for mission-critical applications.

The TPS7A03 family is designed specifically for battery-powered IoT endpoints demanding nanopower operation, fast transient immunity, and extended temperature reliability - targeting wearables, smart meters, and portable diagnostics.

FAQ

What is the maximum output current capability of the TPS7A0328PDQNR?

The TPS7A0328PDQNR is rated for continuous 200mA output current under recommended operating conditions (T_J ≤ +125°C, C_OUT ≥ 1µF). Its current limit is internally set to 240–750mA depending on V_OUT and input conditions, providing short-circuit protection without external foldback circuitry. This makes TPS7A0328PDQNR suitable for driving moderate-current peripherals like BLE radios or sensor arrays while maintaining ultra-low quiescent current.

Does the TPS7A0328PDQNR require an external pull-down resistor on the EN pin?

No, the TPS7A0328PDQNR features a built-in smart enable pulldown resistor (500kΩ nominal) that actively holds the EN pin low when floating, eliminating the need for an external resistor. This internal circuit disconnects automatically when EN is driven high, preventing unwanted current draw during normal operation. The TPS7A0328PDQNR thus reduces BOM count and PCB area versus legacy LDOs requiring discrete EN biasing.

What is the minimum output capacitance required for stability with the TPS7A0328PDQNR?

The TPS7A0328PDQNR is stable with a minimum effective output capacitance of 0.5µF, but TI specifies 1µF or larger ceramic capacitor for optimal transient response and guaranteed stability across temperature and process variation. Using ≥1µF ensures <10µs settling time during 1mA→50mA load steps and suppresses output voltage undershoot to ≤80mV - a key requirement for TPS7A0328PDQNR deployments in burst-mode sensing systems.

How does the TPS7A0328PDQNR perform during input voltage transients?

The TPS7A0328PDQNR exhibits strong line transient rejection: a 2.8V→4.8V input step (1V/µs slew rate) causes only ±6mV AC-coupled output deviation at 200mA load. Its PSRR remains >55dB at 1kHz and >30dB up to 100kHz, enabling clean power delivery in noisy environments such as motor-driven smart meters or RF-co-located wearables - directly supporting the TPS7A0328PDQNR's role in precision analog and digital subsystems.

Is the TPS7A0328PDQNR qualified for automotive or industrial temperature ranges?

Yes, the TPS7A0328PDQNR is fully specified for operation from –40°C to +125°C junction temperature, meeting industrial and extended commercial requirements. It includes thermal shutdown (170°C trip), UVLO with hysteresis (180mV), and ±1.5% output accuracy across this full range - making it suitable for harsh environments like building security controllers, outdoor utility meters, and industrial edge sensors where the TPS7A0328PDQNR's nanopower efficiency and reliability are critical.