AP7347E-22FDCWR-7R

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

The AP7347E-22FDCWR-7R is a low dropout regulator manufactured by Diodes Incorporated, featuring a fixed 2.2V output voltage and housed in the U-DFN2020-6 (SWP) package with code FDCWR. It supports an input voltage range of 1.7V to 5.5V and guarantees a continuous output current of 500mA. The device provides high output voltage accuracy of ±1% and includes a power-good indicator for supply monitoring. Key electrical characteristics include a ripple rejection of 75dB at 1kHz, low output noise of 60µVrms from 10Hz to 100kHz, and a quiescent current as low as 75µA.

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

• Integrated power-good indicator for supply monitoring and sequencing
• Active output discharge ensures known system startup states
• Fold-back short-circuit protection prevents damage during overcurrent events
• Thermal shutdown protection safeguards against overheating

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

• Desktops and notebooks
• Servers
• Gaming consoles
• Camera modules
• Medium-current, noise-sensitive applications

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

Verify that the specific part number matches the required output voltage and package configuration. Confirm compliance with RoHS standards and ensure the ordering suffix corresponds to the intended tape and reel packaging quantity. Cross-reference the manufacturer's documentation for any automotive-specific qualification requirements if applicable to the design.

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

Select this component for designs requiring a stable 2.2V rail with high noise immunity. Ensure the input voltage remains within the specified operating range to maintain regulation. Consider the thermal resistance values when designing the PCB copper area for adequate heat dissipation under maximum load conditions.

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

This LDO belongs to the AP7347E series, designed for noise-sensitive equipment. It utilizes a CMOS process to achieve low dropout voltage and high power supply rejection ratio. The series offers both fixed and adjustable output versions, packaged in compact surface-mount formats suitable for dense PCB layouts.

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

AP7347E-FDCW-7R

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 active output discharge feature work?

When the enable pin is pulled low to shut down the regulator, an internal N-channel MOSFET connects the output to ground. This actively discharges the output capacitor, ensuring the system starts up in a known state upon re-enablement.