Texas Instruments TPS7A0325PDQNR3

Overview

TPS7A0325PDQNR3 from Texas Instruments is an ultra-low quiescent current (200nA typ) 200mA low-dropout linear regulator with fixed 2.5V output, designed for battery-powered IoT sensors and wearables. It delivers excellent transient response (<10µs settling time, 80mV undershoot), operates from 1.5V–6.0V input, maintains 1.5% output accuracy over –40°C to +125°C, and features smart enable with internal pulldown.

For engineers reviewing the TPS7A0325PDQNR3 datasheet, TPS7A0325PDQNR3 pinout, TPS7A0325PDQNR3 application, or TPS7A0325PDQNR3 equivalent, this page provides verified specifications, package mapping to X2SON-4 (1.0mm × 1.0mm), real-world use cases in gas meters and medical monitors, and validated alternative options for ultra-low-I_Q LDO selection.

Technical Context

The TPS7A0325PDQNR3 implements a PMOS pass transistor architecture enabling ultra-low dropout (270mV max at 200mA, V_OUT = 3.3V) and consistent 200nA I_Q across input voltage range and even in dropout mode. Its smart enable circuit integrates a temperature-stable ~500kΩ internal pulldown resistor that ensures reliable disable state without external components.

It supports fast load transients (1mA → 50mA step) with sub-10µs regulation recovery and requires only a 1µF ceramic output capacitor for stability - eliminating need for large bulk capacitance in space-constrained designs like EPOS card readers and residential circuit breakers.

Key Specifications

Pinout & Package

TPS7A0325PDQNR3 is packaged in a 1.0mm × 1.0mm, 4-pin X2SON (DQN) package with wettable flanks for automated optical inspection. The thermal pad is internally connected to GND and must be soldered to a PCB ground plane for thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-I_Q LDO applications.

Compared with TPS7A0325PDQNR3, TPS7A0225PDBVR offers lower I_Q and higher current but larger size and no integrated EN pulldown, while MCP1703T-2502E/MB sacrifices enable control and accuracy for minimal BOM count and cost - making TPS7A0325PDQNR3 optimal for space-constrained, precision, and sequenced ultra-low-power systems.

Availability

TPS7A0325PDQNR3 is available at Aetrix Electronics and suitable for gas meters, blood glucose monitors, residential circuit breakers, and wearable health sensors requiring stable component supply with guaranteed long-term manufacturability and traceable sourcing.

Supply support for TPS7A0325PDQNR3 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 industrial, automotive, and portable applications.

The TPS7A03 family was engineered specifically for ultra-low-power, battery-critical applications - delivering nanopower efficiency without compromising transient performance or thermal robustness in miniature packages.

FAQ

What is the maximum output current capability of the TPS7A0325PDQNR3?

The TPS7A0325PDQNR3 is rated for continuous output current up to 200mA under specified thermal conditions. Its current limit is internally set at 240–750mA depending on output voltage and input conditions, but sustained operation above 200mA requires careful thermal design due to the small X2SON-4 package. For reliable 200mA delivery, ensure adequate PCB copper area under the thermal pad and ambient temperature remains ≤85°C.

Does the TPS7A0325PDQNR3 require an external pull-down resistor on the EN pin?

No, the TPS7A0325PDQNR3 does not require an external pull-down resistor on the EN pin. It integrates a smart enable circuit with a temperature-stable ~500kΩ internal pulldown resistor that holds the device disabled when EN is floating or driven low. This feature eliminates an external component, reduces leakage in enabled state, and improves reliability in space-constrained layouts where the TPS7A0325PDQNR3 is deployed.

What is the minimum output capacitor required for stability with the TPS7A0325PDQNR3?

The TPS7A0325PDQNR3 is stable with a minimum effective output capacitance of 0.5µF, but a 1µF or larger ceramic capacitor is required for optimal transient response and recommended for all production designs. The capacitor must be placed as close as possible to the OUT and GND pins. Using less than 1µF may degrade load-step recovery time and increase output voltage undershoot beyond the specified 80mV for 1mA→50mA steps.

Can the TPS7A0325PDQNR3 operate with a 1.8V input voltage while delivering 2.5V output?

No, the TPS7A0325PDQNR3 cannot regulate 2.5V output from a 1.8V input. Its minimum input voltage is 1.5V, but the required headroom depends on load current and temperature. At 200mA and +125°C, dropout voltage reaches 310mV - meaning VIN must be ≥2.81V to sustain 2.5V output. For 1.8V input, the device enters dropout and output voltage will track VIN minus V_DO, falling below 2.5V.

What is the thermal performance of the TPS7A0325PDQNR3 in its X2SON-4 package?

The TPS7A0325PDQNR3 in the DQN (X2SON-4) package has a junction-to-ambient thermal resistance (R_θJA) of 179.1°C/W and a junction-to-board thermal resistance (R_θJB) of 116.3°C/W. With proper PCB design - including a solid thermal pad connection to a ≥100mm² internal or external ground plane - it can dissipate up to ~150mW continuously at +85°C ambient. Derating is required above this temperature to maintain TJ ≤ +125°C.