Texas Instruments TPS7A0508PDBVR

Overview

TPS7A0508PDBVR from Texas Instruments is a 0.8-V fixed-output, 200-mA ultralow-quiescent-current LDO regulator in a 1.0-mm × 1.0-mm X2SON-4 package. It delivers 1% typical output accuracy, 235 mV max dropout at 200 mA (3.3 V_OUT), and 1 µA typical ground current - enabling multi-year battery life in always-on wearable and IoT sensors.

For engineers reviewing the TPS7A0508PDBVR datasheet, TPS7A0508PDBVR pinout, TPS7A0508PDBVR application, or TPS7A0508PDBVR equivalent, key selection criteria include its 1.4–5.5 V input range, active output discharge, foldback current limit, stability with ≥0.47-µF ceramic output capacitance, and operation across –40°C to +125°C junction temperature.

Technical Context

The TPS7A0508PDBVR 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 under fast load transients up to 200 mA, with <2.8 ms start-up time from EN assertion.

It integrates UVLO (1.3 V threshold with 40 mV hysteresis), thermal shutdown (160°C trip), and an active pulldown circuit for rapid output discharge when disabled - critical for power sequencing in low-power microcontroller subsystems.

Key Specifications

Pinout & Package

TPS7A0508PDBVR uses the 1.0-mm × 1.0-mm, 4-pin X2SON (DQN) package with wettable flanks for automated optical inspection. The thermal pad is electrically isolated and must be connected to PCB ground 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 TPS7A0508PDBVR, the PDQNR offers identical performance in a different reel configuration, while the MCP1700T-0802E/TT trades active discharge and lower dropout for lower unit cost and legacy package compatibility - making it viable only where those features are non-critical.

Availability

TPS7A0508PDBVR is available at Aetrix Electronics and suitable for wearable electronics, industrial wireless sensors, and smart home devices requiring stable component supply with long-term lifecycle assurance.

Supply support for TPS7A0508PDBVR 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 and embedded processing technologies, with decades of LDO design expertise and broad automotive, industrial, and personal electronics qualification.

The TPS7A05 family was engineered specifically for battery-powered, always-on applications demanding nanoscale IQ, small footprint, and robust transient response - targeting wearables, IoT endpoints, and portable medical devices.

FAQ

What is the maximum input voltage rating for the TPS7A0508PDBVR?

The TPS7A0508PDBVR has an absolute maximum input voltage of 6.0 V. However, its recommended operating input range is 1.4 V to 5.5 V. Exceeding 5.5 V may compromise reliability or trigger internal protection circuits, so designs should maintain VIN ≤5.5 V under all normal and transient conditions.

Does the TPS7A0508PDBVR require an external pull-up resistor on the EN pin?

No, the TPS7A0508PDBVR does not require an external pull-up on EN. When enable functionality is unused, the EN pin must be directly connected to IN. Its leakage current is only 10 nA at 5.5 V, ensuring negligible impact on system IQ.

Can the TPS7A0508PDBVR operate with a 0.47-µF output capacitor?

Yes - the TPS7A0508PDBVR is explicitly characterized and guaranteed stable with ceramic output capacitors as low as 0.47 µF. This enables minimal BOM count and board area, especially important in space-constrained wearables where larger capacitors would impede miniaturization.

What is the purpose of the active pulldown resistor in the TPS7A0508PDBVR?

The TPS7A0508PDBVR integrates a 120-Ω active pulldown resistor on the OUT pin. When EN is driven low, this circuit rapidly discharges the output capacitor to GND (<1 ms), preventing unintended biasing or latch-up in downstream logic, analog circuits, or RF sections during power-down sequences.

Is the TPS7A0508PDBVR suitable for automotive applications?

Yes - the TPS7A0508PDBVR is specified for operation from –40°C to +125°C junction temperature and includes thermal shutdown (160°C trip) and UVLO (1.3 V with hysteresis). While not AEC-Q100 qualified, its robustness makes it suitable for cabin-temperature automotive accessories like tire pressure monitors and infotainment peripherals.