AP7347EQ-33FDCW-7R

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The AP7347EQ-33FDCW-7R is a fixed-output low-dropout regulator manufactured by Diodes Incorporated, providing a stable 3.3V output with ±1% accuracy. It supports up to 500mA of guaranteed output current within an input voltage range of 1.7V to 5.5V. The device features a typical ripple rejection ratio of 75dB at 1kHz and a low output noise of 60µVrms from 10Hz to 100kHz. Quiescent current is specified as low as 75µA. It includes integrated power-good indication, active output discharge, and thermal shutdown protection.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Includes a power-good indicator for supply monitoring and sequencing
• Features active output discharge to ensure known system startup states
• Provides foldback short-circuit current limiting and thermal shutdown protection

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Automotive infotainment power supplies
• Automotive RF subsystems
• ADAS load point applications
• Automotive wireless communication systems

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific ordering suffix matches the required package type and tape-and-reel quantity. Confirm that the component meets AEC-Q100 qualification standards if automotive compliance is mandatory. Ensure the selected variant aligns with the intended fixed or adjustable voltage configuration requirements.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component for designs requiring high PSRR and low noise in automotive environments. The U-DFN2020-6 package offers a compact footprint suitable for space-constrained PCB layouts. Consider the thermal resistance characteristics when designing heat dissipation paths for high-load conditions.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the AP7347EQ series of high-performance LDOs designed specifically for automotive applications. It is manufactured in IATF 16949 certified facilities and supports PPAP processes. The series is available in multiple fixed output voltages ranging from 1.0V to 5.0V.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

AP7347EQ-FDCW-7R (Adjustable version in same package)

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

What is the function of the PG pin?

The Power-Good (PG) pin is an open-drain output that indicates when the output voltage exceeds the power-good threshold. It goes into a high-impedance state when VOUT is above the threshold and is pulled low when VOUT drops below the threshold or the device is disabled.

How does the device handle short circuits?

When the output is shorted to ground, the internal circuitry triggers foldback short-circuit protection, clamping the output current to approximately 180mA to prevent damage from overheating.