AP7347EQ-33FDCWR-7R

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

The AP7347EQ-33FDCWR-7R is a fixed-output low-dropout regulator manufactured by Diodes Incorporated. It provides a nominal output voltage of 3.3V with an accuracy of ±1%. The device supports a guaranteed output current of 500mA and operates within an input voltage range of 1.7V to 5.5V. Key electrical characteristics include a ripple rejection ratio of 75dB at 1kHz, an output noise of 60µVrms (10Hz to 100kHz), and a quiescent current of 75µA. It features a power-good indicator and is housed in the U-DFN2020-6 (SWP) package.

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

• Includes a power-good open-drain output for supply monitoring and sequencing
• Features active output discharge to ensure known system startup states
• Integrated thermal shutdown and foldback short-circuit protection

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

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

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

Verify that the specific part number matches the required package code FDCWR and the trailing suffix 7R, which indicates tape and reel packaging. Confirm the internal designation corresponds to the 3.3V fixed output variant. Ensure compliance with automotive quality standards such as AEC-Q100 qualification and PPAP capability if intended for production vehicles.

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

Select this component when designing noise-sensitive automotive circuits requiring high power-supply rejection ratios. The integrated power-good pin facilitates precise timing control for downstream components. Verify that the PCB layout accommodates the exposed pad for optimal thermal dissipation under maximum load conditions.

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

This device belongs to the AP7347EQ series of low-dropout regulators designed specifically for automotive environments. It is manufactured in IATF 16949 certified facilities and meets AEC-Q100 Grade 1 requirements. The series offers both fixed and adjustable output options across various compact packages.

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

AP7347EQ-33FDCW-7R

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

How does the power-good pin function?

The power-good pin is an open-drain output that goes into a high-impedance state when VOUT exceeds the threshold and is pulled low by an internal MOSFET when VOUT drops below the threshold or the device is disabled.

What is the purpose of the NC pin on the U-DFN2020-6 package?

The NC pin is not connected internally but should be connected to GND on the PCB to maximize copper area for improved thermal dissipation.