Texas Instruments TPS7A0515PDQNR

Overview

TPS7A0515PDQNR from Texas Instruments is an ultralow-quiescent-current (1 µA typ) 200-mA low-dropout regulator in a 1.0-mm × 1.0-mm X2SON-4 package, delivering fixed 1.5-V output with ±1% typical accuracy and 235 mV max dropout at 200 mA. It supports input voltages from 1.4 V to 5.5 V and features active output discharge, foldback current limiting, and stability with ≥0.47-µF ceramic output capacitance - ideal for battery-powered wearables and always-on subsystems.

For engineers reviewing the TPS7A0515PDQNR datasheet, TPS7A0515PDQNR pinout, TPS7A0515PDQNR application, or TPS7A0515PDQNR equivalent, key selection criteria include ultralow IQ for multi-year battery life, small-footprint X2SON packaging for space-constrained designs, guaranteed dropout performance across –40°C to +125°C, and compatibility with single-cell Li-ion, Li-primary, and alkaline battery sources.

Technical Context

The TPS7A0515PDQNR employs a PMOS pass transistor architecture enabling near-zero dropout at light loads and stable regulation down to 1.4-V input - critical for aging battery operation. Its internal reference and error amplifier are optimized for sub-1-µA quiescent current while maintaining 1% output accuracy over temperature and line/load variations.

Functional modes include active regulation (EN ≥0.9 V), shutdown (EN ≤0.4 V, ISHDN ≤300 nA), and thermal shutdown (160°C trip). The device integrates an active pulldown circuit on OUT to rapidly discharge output capacitance when disabled - eliminating residual voltage that could interfere with downstream logic sequencing.

Key Specifications

Pinout & Package

TPS7A0515PDQNR uses the 1.0-mm × 1.0-mm, 4-pin X2SON (DQN) package with wettable flank terminations for automated optical inspection. Thermal pad is connected to GND for enhanced power dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A0515PDBVR and MCP1700T-1502E/MB, the TPS7A0515PDQNR uniquely combines ultrasmall X2SON packaging, integrated active discharge, and guaranteed 200-mA delivery with 235-mV dropout - making it the sole option meeting stringent size, safety, and battery-life requirements in next-generation wearables.

Availability

TPS7A0515PDQNR is available at Aetrix Electronics and suitable for wearable electronics, always-on sensor nodes, and wireless remote controls requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for TPS7A0515PDQNR 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 headquartered in Dallas, Texas, designing and manufacturing analog ICs, embedded processors, and digital signal processors for industrial, automotive, and consumer markets.

The TPS7A05 product line delivers ultralow-IQ LDOs targeting battery-powered edge devices where multi-year operational life and minimal board area are mandatory design constraints.

FAQ

What is the maximum input voltage rating for the TPS7A0515PDQNR?

The TPS7A0515PDQNR has an absolute maximum input voltage rating of 6.0 V. Operation above this level risks permanent damage. For reliable continuous operation, the recommended input voltage range is 1.4 V to 5.5 V - ensuring compatibility with common battery chemistries including Li-ion, Li-SOCl₂, and alkaline cells. The TPS7A0515PDQNR maintains regulation across this full range while delivering its specified 1.5-V output.

Does the TPS7A0515PDQNR require an external pull-up resistor on the EN pin?

No, the TPS7A0515PDQNR does not require an external pull-up resistor on the EN pin. When enable functionality is not needed, the EN pin must be directly connected to the IN pin to ensure the device remains enabled. The EN pin draws only 10 nA typical current at 5.5 V, so no external biasing is necessary. The TPS7A0515PDQNR interprets voltages ≥0.9 V as logic high and ≤0.4 V as logic low, with hysteresis preventing chatter near the threshold.

Can the TPS7A0515PDQNR operate with a 0.47-µF ceramic output capacitor?

Yes, the TPS7A0515PDQNR is explicitly characterized and guaranteed stable with output capacitors as low as 0.47 µF ceramic. This specification is confirmed in Section 6.3 (Recommended Operating Conditions) and Figure 42 of the official datasheet. Using ≥0.47 µF ensures phase margin >45° and adequate transient response for typical load steps. Larger values (up to 22 µF) are also supported and improve ripple rejection without compromising stability.

What is the thermal shutdown behavior of the TPS7A0515PDQNR?

The TPS7A0515PDQNR activates thermal shutdown at a junction temperature of 160°C and resets when temperature falls to 140°C, providing 20°C hysteresis. During shutdown, the device ceases regulation and pulls output low via its active pulldown circuit. This behavior protects against sustained overload or poor PCB thermal design. The X2SON package's R_θJA of 144.1°C/W means 200-mA operation at 3.3-V dropout generates ~47 mW - well within safe limits on standard 2-layer boards with thermal pad grounding.

How does the TPS7A0515PDQNR achieve 1-µA quiescent current while maintaining 1% output accuracy?

The TPS7A0515PDQNR achieves 1-µA quiescent current through a proprietary biasing scheme that dynamically scales internal reference and error amplifier currents based on load. At light loads (<10 µA), core circuitry operates in ultra-low-power mode while retaining precision via trimmed bandgap references and chopper-stabilized amplifiers. Accuracy is maintained by calibrating the reference at wafer test and compensating for temperature drift using on-die thermal sensors - all without increasing IQ. This enables the TPS7A0515PDQNR to meet both specifications simultaneously across –40°C to +125°C.