Texas Instruments TPS7A0515PDQNT

Overview

TPS7A0515PDQNT from Texas Instruments is a 1.5-V fixed-output, ultralow-quiescent-current (1 µA typ) low-dropout regulator in a 1.0-mm × 1.0-mm X2SON-4 package, delivering up to 200 mA with 1% typical output accuracy and 235 mV max dropout at full load - designed for battery-powered wearable electronics and always-on subsystems.

For engineers reviewing the TPS7A0515PDQNT datasheet, TPS7A0515PDQNT pinout, TPS7A0515PDQNT application, or TPS7A0515PDQNT equivalent, key selection criteria include ultralow IQ operation down to 1 µA, active output discharge, stable performance with ≥0.47-µF ceramic output capacitance, and compatibility with Li-SOCl₂, Li-MnO₂, and multi-cell alkaline batteries.

Technical Context

The TPS7A0515PDQNT employs a PMOS pass transistor architecture enabling ultra-low dropout and near-zero reverse current during shutdown. Its internal bandgap reference and error amplifier maintain tight regulation across –40°C to +125°C junction temperature, with UVLO (1.21–1.37 V) and thermal shutdown (160°C) protection.

It features an enable input (VEN(HI) = 0.9 V min) that supports direct connection to IN when unused, and includes foldback current limiting and active pulldown for rapid output discharge upon disable - critical for power sequencing in low-power microcontroller subsystems.

Key Specifications

Pinout & Package

TPS7A0515PDQNT uses the 1.0-mm × 1.0-mm, 4-pin X2SON (DQN) package with wettable flanks for automated optical inspection. Thermal pad must be connected to PCB ground plane for optimal thermal performance (R_θJB = 83.5°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A0515PDQNT, the TPS7A0515PDBVR offers identical regulation performance in a larger, more thermally robust package, while the MCP1700T-1502E/TT trades off ultralow IQ and active discharge for lower cost and simpler enable-free operation - making TPS7A0515PDQNT optimal for miniaturized, battery-lifetime-critical designs.

Availability

TPS7A0515PDQNT is available at Aetrix Electronics and suitable for wearable electronics, always-on MCU subsystems, and industrial wireless sensors requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for TPS7A0515PDQNT 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for battery-operated systems.

The TPS7A05 family was designed specifically for ultra-low-power, space-constrained applications such as wearables and IoT edge nodes - prioritizing nanoscale packaging, sub-µA quiescent current, and robust operation across wide temperature and input voltage ranges.

FAQ

What is the maximum input voltage rating for the TPS7A0515PDQNT?

The TPS7A0515PDQNT has an absolute maximum input voltage of 6.0 V. However, its recommended operating range is 1.4 V to 5.5 V. Exceeding 5.5 V may compromise reliability or trigger overvoltage protection mechanisms not explicitly documented in the datasheet. Always maintain VIN ≤ 5.5 V in normal operation to ensure compliance with specifications and long-term device integrity for the TPS7A0515PDQNT.

Does the TPS7A0515PDQNT require an external pull-up resistor on the EN pin?

No, the TPS7A0515PDQNT does not require an external pull-up resistor on the EN pin. When enable functionality is not needed, the EN pin must be connected directly to IN per the datasheet. The device draws only 10 nA at EN when VIN = 5.5 V, so leakage is negligible. Adding an external resistor risks violating the VEN(HI) threshold (≥0.9 V) under low-input conditions and is unnecessary for reliable operation of the TPS7A0515PDQNT.

Can the TPS7A0515PDQNT operate with a 0.22-µF output capacitor?

No, the TPS7A0515PDQNT requires a minimum output capacitance of 0.47 µF ceramic for guaranteed stability across all operating conditions. Using 0.22 µF violates the stability criterion and may cause oscillation or poor transient response. The datasheet specifies 0.47 µF as the minimum value validated for phase margin >45° and monotonic step-load recovery - essential for reliable operation of the TPS7A0515PDQNT in production systems.

Is the thermal pad of the TPS7A0515PDQNT electrically connected to GND?

Yes, the thermal pad of the TPS7A0515PDQNT is internally connected to GND and must be soldered to a large-area PCB ground plane. This connection is mandatory for achieving the published thermal resistance (R_θJB = 83.5°C/W) and preventing thermal shutdown under 200-mA load. Leaving the pad unconnected or floating will degrade thermal performance and may cause premature thermal limiting during sustained operation of the TPS7A0515PDQNT.

What is the shutdown current of the TPS7A0515PDQNT at room temperature?

The shutdown current of the TPS7A0515PDQNT is 100–300 nA at 25°C when EN is held below 0.4 V and VIN is between 1.4 V and 5.5 V. This ultra-low shutdown current preserves battery charge during extended storage or deep-sleep modes. Measured values fall well below 1 µA, confirming suitability for applications demanding multi-year shelf life - a key design advantage of the TPS7A0515PDQNT in energy-sensitive systems.