Texas Instruments TPS7A0530PDQNT

Overview

TPS7A0530PDQNT 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 3.0-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 capacitors - ideal for battery-powered wearables and always-on subsystems.

For engineers reviewing the TPS7A0530PDQNT datasheet, TPS7A0530PDQNT pinout, TPS7A0530PDQNT application, or TPS7A0530PDQNT equivalent, key selection criteria include ultralow IQ for multi-year battery life, small-footprint X2SON packaging for space-constrained designs, guaranteed 200-mA output capability across –40°C to +125°C, and compatibility with single-cell Li-ion, Li-primary, and alkaline battery sources.

Technical Context

The TPS7A0530PDQNT employs a PMOS pass transistor architecture enabling near-zero dropout behavior at light loads and stable regulation down to 1.4-V input. Its enable-controlled shutdown reduces quiescent current to 100 nA (typ), and integrated active pulldown discharges the output within microseconds when disabled.

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 meets stringent line regulation (≤16.5 mV) and load regulation (≤43 mV for DBV/DQN/YKA packages) across full operating temperature and load ranges.

Key Specifications

Pinout & Package

TPS7A0530PDQNT uses the 1.0-mm × 1.0-mm, 4-pin X2SON (DQN) package with wettable flank leads and an exposed thermal pad connected to GND for enhanced thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A0530PDBVR, the TPS7A0530PDQNT offers 33% smaller footprint and superior thermal performance; versus MCP1700T-3002E/MB, it delivers tighter accuracy, lower dropout, and integrated discharge - critical for high-reliability, space-constrained, and sequenced power systems.

Availability

TPS7A0530PDQNT is available at Aetrix Electronics and suitable for wearable electronics, always-on IoT edge nodes, and portable medical diagnostics requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS7A0530PDQNT 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 specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in power management IC design.

The TPS7A05 product line targets ultra-low-power, space-constrained applications - delivering nanoscale LDOs optimized for multi-year battery life in wearables, remote sensors, and energy-harvesting systems.

FAQ

What is the maximum output current capability of the TPS7A0530PDQNT?

The TPS7A0530PDQNT is rated for 200 mA continuous output current across its full operating temperature range (–40°C to +125°C). This is verified under worst-case conditions including 3.3-V input, 3.0-V output, and ambient temperatures up to +85°C with proper PCB thermal design. Peak current capability may reach 450 mA under foldback limiting, but sustained operation above 200 mA is not recommended due to thermal constraints in the X2SON-4 package.

Does the TPS7A0530PDQNT require an input capacitor?

Yes, the TPS7A0530PDQNT requires a minimum 1-µF ceramic input capacitor placed as close as possible to the IN and GND pins. This capacitor reduces input impedance, suppresses high-frequency noise from upstream sources, and improves transient response during load steps. TI's datasheet specifies 1 µF as the nominal value, and larger values (e.g., 2.2 µF) are acceptable and may further enhance stability in noisy environments.

How does the active output discharge function work on the TPS7A0530PDQNT?

The TPS7A0530PDQNT integrates an internal 120-Ω (typ) pulldown resistor between OUT and GND that activates automatically when the EN pin is driven below 0.4 V. This discharges the output capacitance to <0.1 V within approximately 100 µs for a 1-µF load, preventing floating voltages and ensuring deterministic reset behavior in power-sequenced systems. No external components are required to enable this feature.

Can the TPS7A0530PDQNT operate from a single Li-SOCl₂ battery?

Yes, the TPS7A0530PDQNT supports input voltages as low as 1.4 V, making it compatible with fully discharged Li-SOCl₂ cells (nominal 3.6 V, end-of-life ~2.0 V). Its 235-mV dropout at 200 mA ensures regulation remains active down to ~3.235 V output - well within the usable voltage window of primary lithium chemistries. UVLO threshold (1.21–1.37 V) also prevents erratic operation during deep discharge.

What is the thermal performance of the TPS7A0530PDQNT in its X2SON-4 package?

The TPS7A0530PDQNT in the DQN (X2SON-4) package achieves a junction-to-ambient thermal resistance (R_θJA) of 144.1°C/W when mounted on a standard 2-layer PCB with a 1-in² copper pour connected to the thermal pad. This enables safe operation at 200 mA continuous load up to +85°C ambient, assuming ≤1.5 W total power dissipation. For higher ambient or sustained loads, thermal relief via additional vias to inner-layer ground planes is recommended.