Texas Instruments TPS7A0511PDQNR

Overview

TPS7A0511PDQNR 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 1.1-V output with ±1% accuracy over –40°C to +125°C. It supports input voltages from 1.4 V to 5.5 V, achieves 235 mV max dropout at 200 mA (for 3.3-V output), and features active output discharge-enabling rapid shutdown in battery-powered wearables and always-on subsystems.

For engineers reviewing the TPS7A0511PDQNR datasheet, TPS7A0511PDQNR pinout, TPS7A0511PDQNR application, or TPS7A0511PDQNR equivalent, key selection criteria include ultralow IQ for multi-year battery life, small-footprint X2SON packaging for space-constrained designs, stable operation with ≥0.47-µF ceramic output capacitance, and compatibility with Li-SOCl₂, Li-MnO₂, and alkaline primary cells.

Technical Context

The TPS7A0511PDQNR implements a PMOS pass transistor architecture enabling near-zero dropout at light loads and foldback current limiting for robust short-circuit protection. Its enable pin (EN) accepts logic-level control with 0.9-V min high threshold and 0.4-V max low threshold, supporting direct connection to microcontroller GPIOs without level shifting.

Thermal performance is optimized via the exposed thermal pad in the X2SON-4 package, achieving 144.1°C/W junction-to-ambient resistance. The device integrates UVLO (1.3-V threshold with 40-mV hysteresis) and thermal shutdown (160°C trip, 140°C reset) to ensure safe operation across industrial temperature ranges.

Key Specifications

Pinout & Package

TPS7A0511PDQNR uses the 1.0-mm × 1.0-mm, 4-pin X2SON (DQN) package with wettable flank leads and an exposed thermal pad. The package is designed for automated optical inspection (AOI) and offers low thermal resistance (R_θJA = 144.1°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A0511PDQNR, the TPS7A0512PDQNR offers identical performance in every respect except output voltage-making it a drop-in alternative for 1.2-V systems-while the MCP1700T-1102E/TT trades ultralow IQ and advanced features for legacy package compatibility and lower cost in less demanding applications.

Availability

TPS7A0511PDQNR is available at Aetrix Electronics and suitable for wearable electronics, always-on power supplies, and portable medical devices requiring stable component supply, long-lifecycle support, and guaranteed traceability.

Supply support for TPS7A0511PDQNR 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 family was developed specifically for battery-powered applications demanding nanoscale quiescent current, minimal board area, and robust operation across wide temperature and input-voltage ranges-targeting wearables, remote sensors, and disposable medical electronics.

FAQ

What is the minimum input voltage required for TPS7A0511PDQNR to regulate at 1.1 V?

The TPS7A0511PDQNR requires a minimum input voltage of 1.4 V to maintain regulation at its fixed 1.1-V output. This 300-mV headroom accommodates the device's internal dropout characteristics and ensures stable operation even under worst-case process, voltage, and temperature (PVT) conditions across the full –40°C to +125°C junction range.

Does TPS7A0511PDQNR require an external pull-up resistor on the EN pin?

No, the TPS7A0511PDQNR does not require an external pull-up resistor on the EN pin. When enable functionality is not needed, EN may be directly connected to IN. The device draws only ≤10 nA from EN, and its logic thresholds (VEN(HI) ≥ 0.9 V, VEN(LO) ≤ 0.4 V) allow direct interfacing with most microcontroller GPIOs without additional components.

Can TPS7A0511PDQNR operate with a 0.22-µF output capacitor?

No-TPS7A0511PDQNR requires a minimum 0.47-µF ceramic output capacitor for stability and specified transient performance. Using a smaller capacitor risks oscillation, excessive output voltage deviation during load steps, and failure to meet datasheet accuracy or PSRR specifications. TI validates all electrical characteristics with ≥0.47 µF.

Is the thermal pad of TPS7A0511PDQNR electrically connected to GND?

Yes, the exposed thermal pad on the TPS7A0511PDQNR X2SON-4 package is internally connected to the GND terminal. It must be soldered to a large-area PCB ground plane to achieve rated thermal performance (R_θJA = 144.1°C/W) and ensure reliable operation at full 200-mA load across temperature extremes.

What is the purpose of the active output discharge feature in TPS7A0511PDQNR?

The active output discharge feature in TPS7A0511PDQNR uses an internal 120-Ω pulldown resistor (typical) to rapidly discharge the OUT pin when the device is disabled via the EN pin. This prevents floating output voltages that could cause unintended biasing or leakage in downstream circuitry-critical for low-power wake-up integrity in wearables and sensor nodes.