Texas Instruments TPS7A0325DQNR3

Overview

TPS7A0325DQNR3 from Texas Instruments is a nanopower low-dropout voltage regulator delivering 200mA output with ultra-low 200nA quiescent current (typ), 1.5% output accuracy over temperature, and 270mV max dropout at 200mA (VOUT = 3.3V). It operates from 1.5V to 6.0V input and provides fixed 2.5V output in a 1.0mm × 1.0mm X2SON-4 package, designed for battery-powered wearables and medical sensors where standby current and transient response are critical.

For engineers reviewing the TPS7A0325DQNR3 datasheet, TPS7A0325DQNR3 pinout, TPS7A0325DQNR3 application, or TPS7A0325DQNR3 equivalent, this page delivers verified electrical specs, thermal performance data, smart enable behavior, fast transient metrics (<10µs settling), and real-world use cases in ultra-low-power systems requiring long shelf life and high reliability across –40°C to +125°C.

Technical Context

The TPS7A0325DQNR3 integrates a smart enable circuit with an internal pulldown resistor (500kΩ typ at VEN = 0.3V) that ensures reliable disable state even when EN floats-eliminating external pull-down components. Its LDO architecture maintains 200nA IQ in dropout mode and drops to 3nA in shutdown, directly extending battery life in intermittent-sensing applications.

Transient response is optimized via internal compensation stable with ≥1µF ceramic output capacitance; load steps from 1mA to 50mA settle in under 10µs with only 80mV undershoot. The device meets full automotive-grade junction temperature range (–40°C to +125°C) and includes UVLO (1.23V–1.47V rising threshold) and thermal shutdown (170°C trip).

Key Specifications

Pinout & Package

TPS7A0325DQNR3 uses the DQN (X2SON-4) package: 1.0mm × 1.0mm, 4-pin, bottom-side thermal pad connected internally to GND. Pin 1 = OUT, Pin 2 = GND, Pin 3 = EN, Pin 4 = IN. Thermal pad must be soldered to large-area ground plane for thermal performance (RθJB = 116.3°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A0225PDBVR and MCP1703T-2502E/MB, the TPS7A0325DQNR3 uniquely combines 200nA IQ, integrated smart enable, thermal pad for 116.3°C/W junction-to-board resistance, and X2SON-4 size-making it the only option meeting simultaneous requirements for miniaturized, decade-life, and thermally constrained battery systems.

Availability

TPS7A0325DQNR3 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, residential circuit breakers, and portable medical diagnostics requiring stable component supply, long-term lifecycle assurance, and guaranteed traceability.

Supply support for TPS7A0325DQNR3 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 design for industrial and medical markets.

The TPS7A03 family was engineered specifically for nanopower battery-operated systems demanding sub-µA quiescent current, fast transient immunity, and extended temperature operation-targeting next-generation wearables, remote sensors, and safety-critical edge devices.

FAQ

What is the maximum output current capability of the TPS7A0325DQNR3?

The TPS7A0325DQNR3 delivers up to 200mA continuous output current while maintaining regulation and specified accuracy. Its current limit is internally set to 240–750mA depending on output voltage and input conditions, providing robust short-circuit protection without external current-sense components. At 200mA, dropout remains ≤270mV for VOUT = 3.3V, confirming full rated output capability in compact form factor.

Does the TPS7A0325DQNR3 require an external pull-down resistor on the EN pin?

No-the TPS7A0325DQNR3 features a smart enable circuit with an internal 500kΩ pulldown resistor on the EN pin, which is automatically disconnected when EN is driven high. This eliminates the need for external pull-down components, reduces BOM count, and prevents unintended current draw during enabled operation. The internal design ensures reliable disable state even when EN is left floating.

What is the minimum output capacitance required for stability with the TPS7A0325DQNR3?

The TPS7A0325DQNR3 is stable with a minimum effective output capacitance of 0.5µF, but Texas Instruments specifies ≥1µF ceramic capacitor for optimal transient response and guaranteed stability across all operating conditions. Using 1µF or larger improves load-step recovery (settling time <10µs) and reduces output voltage undershoot to 80mV-critical for noise-sensitive analog circuits and high-speed digital wake-up events.

How does the TPS7A0325DQNR3 perform under thermal stress?

The TPS7A0325DQNR3 is fully specified from –40°C to +125°C junction temperature and includes thermal shutdown at 170°C (with 25°C hysteresis). Its X2SON-4 package achieves RθJB = 116.3°C/W when the thermal pad is soldered to a large PCB ground plane. Under worst-case 200mA load at 6.0V input, power dissipation is ~540mW-requiring adequate copper area to maintain TJ < 125°C in sealed enclosures.

Can the TPS7A0325DQNR3 operate with input voltages below 1.5V?

No-the absolute minimum input voltage for the TPS7A0325DQNR3 is 1.5V per recommended operating conditions. Below this, the device may not regulate or could enter undefined behavior. Its UVLO circuit activates at 1.23V (rising), preventing startup until VIN exceeds threshold-but sustained operation requires VIN ≥ 1.5V. For sub-1.5V sources, consider energy harvesting boost regulators preceding the TPS7A0325DQNR3.