Texas Instruments TPS7A0520PDQNR

Overview

TPS7A0520PDQNR from Texas Instruments is a 200-mA, ultralow-quiescent-current LDO regulator in a 1.0-mm × 1.0-mm X2SON-4 package, delivering 2.0 V fixed output with ±1% typical accuracy, 1 µA typical IQ, and 235 mV max dropout at 200 mA - optimized for battery-powered wearables and always-on subsystems.

For engineers reviewing the TPS7A0520PDQNR datasheet, TPS7A0520PDQNR pinout, TPS7A0520PDQNR application, or TPS7A0520PDQNR equivalent, key selection criteria include ultralow ground current across load (0.6–1.3 µA at 1 µA I_OUT), active output discharge, foldback current limiting, and stability with ≥0.47-µF ceramic output capacitance.

Technical Context

The TPS7A0520PDQNR employs a PMOS pass transistor architecture enabling near-zero dropout behavior at light loads and robust line/load regulation (≤16.5 mV line reg, ≤43 mV load reg for DBV/DQN/YKA packages). Its enable-controlled shutdown achieves ≤300 nA quiescent current and integrates UVLO (1.21–1.37 V threshold) with 40-mV hysteresis.

Internal thermal shutdown activates at 160°C (trip) / 140°C (release), and the device supports fast transient response via low-output-impedance design - demonstrated by <±50 mV output deviation during 0–200 mA load steps with 3.3 mA/µs slew rate.

Key Specifications

Pinout & Package

TPS7A0520PDQNR uses the 1.0-mm × 1.0-mm, 4-pin X2SON (DQN) package with wettable flank terminations 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 LDO regulator applications.

Compared with TPS7A0520PDBVR and MCP1700T-2002E/TT, the TPS7A0520PDQNR delivers superior thermal performance in minimal area, guaranteed active discharge, and tighter 1% accuracy - making it optimal for space- and battery-life–constrained portable medical and wearable designs.

Availability

TPS7A0520PDQNR is available at Aetrix Electronics and suitable for wearable electronics, always-on power supplies, and portable medical diagnostics requiring stable component supply with full production traceability and long-term lifecycle support.

Supply support for TPS7A0520PDQNR 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 operation from primary cells is mandatory - emphasizing minimal quiescent current, small footprint, and robust transient response.

FAQ

What is the maximum input voltage rating for the TPS7A0520PDQNR?

The TPS7A0520PDQNR 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 trigger internal protection circuits or degrade reliability over time, so designs should maintain VIN within the specified operating window for sustained performance and longevity of the TPS7A0520PDQNR.

Does the TPS7A0520PDQNR require an external capacitor on the EN pin?

No, the TPS7A0520PDQNR does not require an external capacitor on the EN pin. The enable input is CMOS-compatible with leakage current of only 10 nA at 5.5 V, and its logic thresholds (VEN(HI) ≥ 0.9 V, VEN(LO) ≤ 0.4 V) are designed for direct connection to microcontroller GPIO or simple resistive dividers. Adding capacitance risks slowing enable timing and is unnecessary for noise immunity in typical applications of the TPS7A0520PDQNR.

Can the TPS7A0520PDQNR operate from a single 1.5-V alkaline cell?

No, the TPS7A0520PDQNR cannot operate from a single 1.5-V alkaline cell. Its minimum recommended input voltage is 1.4 V, but the 2.0-V output requires sufficient headroom - the dropout voltage is 915 mV at 200 mA for 0.8–1.0 V outputs, and for 2.0 V output, dropout is ~195 mV min. Thus, reliable regulation requires VIN ≥ 2.195 V, meaning at least two alkaline cells (nominal 3.0 V) are needed. The TPS7A0520PDQNR is intended for 2+ cell or Li-based sources, not single 1.5-V cells.

Is the thermal pad of the TPS7A0520PDQNR electrically connected internally?

No, the thermal pad of the TPS7A0520PDQNR is not electrically connected to any internal circuit node. It serves solely as a mechanical and thermal interface to the PCB ground plane. TI's datasheet explicitly states "Thermal pad - Connect the thermal pad to a large-area ground plane. This pad is not an electrical connection to the device ground." Therefore, it must be soldered to a solid GND pour for thermal performance but carries no signal or power function in the TPS7A0520PDQNR.

What is the purpose of the foldback current limit in the TPS7A0520PDQNR?

The foldback current limit in the TPS7A0520PDQNR reduces output current during overload or short-circuit events - dropping from ~210–700 mA normal limit to ~65–150 mA at V_OUT = 0 V. This protects both the TPS7A0520PDQNR and the power source by minimizing power dissipation (P = V × I) during faults, preventing thermal runaway and enabling safe auto-recovery once the fault clears. It is intrinsic to the IC's protection architecture and requires no external components.