Texas Instruments TPS7A0315PDQNRM3

Overview

TPS7A0315PDQNRM3 from Texas Instruments is a nanopower, 200mA low-dropout linear regulator with 200nA quiescent current, 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 delivers a fixed 1.5V output in a 1.0mm × 1.0mm X2SON package, designed for battery-powered wearables and ultra-low-power sensing nodes.

For engineers reviewing the TPS7A0315PDQNRM3 datasheet, TPS7A0315PDQNRM3 pinout, TPS7A0315PDQNRM3 application, or TPS7A0315PDQNRM3 equivalent, key selection criteria include ultra-low IQ in dropout, fast transient response (<10µs settling), smart enable pulldown, stability with 1µF output capacitance, and operation across –40°C to +125°C junction temperature.

Technical Context

The TPS7A0315PDQNRM3 implements a PMOS pass transistor architecture enabling ultra-low quiescent current independent of load or input voltage, maintaining 200nA IQ even in dropout. Its smart enable circuit integrates a temperature- and VOUT-dependent internal pulldown resistor (~500kΩ at 25°C) that ensures reliable disable state without external components.

Transient performance is optimized via internal compensation and low-output-impedance design, achieving <10µs settling time and ≤80mV undershoot during 1mA–50mA load steps. The device is stable with ≥1µF ceramic output capacitance and features UVLO (1.23–1.47V rising threshold) and thermal shutdown (170°C trip).

Key Specifications

Pinout & Package

TPS7A0315PDQNRM3 uses the DQN (X2SON, 4-pin) package: 1.0mm × 1.0mm body, 0.5mm pitch, thermal pad on bottom connected internally to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A0315PDQNRM3, TPS7A0215PDQNR offers superior quiescent current but sacrifices high-temperature operation, while MCP1700T-1502E/MB provides lower cost and simpler layout at the expense of nanopower efficiency and dynamic performance.

Availability

TPS7A0315PDQNRM3 is available at Aetrix Electronics and suitable for wearable electronics, utility metering, residential circuit protection, and building security systems requiring stable component supply and long-term lifecycle support.

Supply support for TPS7A0315PDQNRM3 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 delivering analog and embedded processing solutions, with deep expertise in power management ICs for ultra-low-power applications.

The TPS7A03 family is engineered for battery-operated IoT endpoints and medical wearables, prioritizing nanoscale IQ, minimal footprint, and robust transient behavior in thermally constrained environments.

FAQ

What is the maximum output current capability of the TPS7A0315PDQNRM3?

The TPS7A0315PDQNRM3 is rated for continuous output current up to 200mA. 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 load and VOUT = 3.3V, dropout remains ≤270mV across –40°C to +85°C, confirming full-rated operation within thermal limits in the DQN package.

Does the TPS7A0315PDQNRM3 require an external pull-down resistor on the EN pin?

No, the TPS7A0315PDQNRM3 does not require an external pull-down resistor on the EN pin. It features a smart enable circuit with an integrated, temperature-compensated pulldown resistor (~500kΩ at 25°C) that ensures reliable disable state when EN is left floating. This internal resistor disconnects automatically when EN is driven high, eliminating external components and reducing system leakage.

What output capacitor value is required for stability with the TPS7A0315PDQNRM3?

The TPS7A0315PDQNRM3 is stable with a minimum effective output capacitance of 0.5µF, but a 1µF or larger ceramic capacitor is required to achieve specified fast transient response (<10µs settling, ≤80mV undershoot). TI recommends X5R or X7R dielectric types placed as close as possible to the OUT and GND pins to minimize parasitic inductance and ensure optimal performance.

Can the TPS7A0315PDQNRM3 operate with input voltages below 1.5V?

No, the TPS7A0315PDQNRM3 has a specified minimum input voltage of 1.5V per its Recommended Operating Conditions. Below this, the device may fail to regulate or enter undervoltage lockout (UVLO), which activates at VIN < 1.23V (rising) and releases at >1.41V (falling). Operation below 1.5V is outside guaranteed specifications and risks unstable output or uncontrolled shutdown.

Is the TPS7A0315PDQNRM3 compatible with ceramic capacitors having low ESR?

Yes, the TPS7A0315PDQNRM3 is explicitly designed for use with low-ESR ceramic capacitors and does not require added series resistance for stability. Its internal compensation is optimized for 1µF–22µF ceramic output capacitors (X5R/X7R), and TI confirms stability across this range without external RC networks - simplifying design and reducing bill-of-materials cost.