AP7347EQ-22FDCW-7R

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

The AP7347EQ-22FDCW-7R is a low dropout regulator manufactured by Diodes Incorporated. It provides a fixed output voltage of 2.2V with guaranteed output current capability up to 500mA. The device operates within an input voltage range of 1.7V to 5.5V and maintains output voltage accuracy within ±1%. Key electrical characteristics include a ripple rejection ratio of 75dB at 1kHz, low output noise of 60µVrms from 10Hz to 100kHz, and quiescent current as low as 75µA. It features a power-good indicator and active output discharge.

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

• Integrated power-good (PG) open-drain output for supply monitoring and sequencing
• Active output discharge function to ensure known system startup states when disabled
• Fold-back short-circuit current limiting and thermal shutdown protection
• High power density side-wall plated package design

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

• Noise-sensitive equipment requiring stable power rails
• Desktops and notebooks
• Servers and gaming consoles
• Camera modules

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

Verify the specific ordering suffix '7R' corresponds to tape and reel packaging containing 3000 units per carrier. Confirm that the 'E' designation aligns with the AP7347E series datasheet specifications rather than other variants. Ensure the FDCW package code matches the required U-DFN2020-6 footprint for PCB layout compatibility.

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

Select this component for applications requiring high PSRR and low noise in compact form factors. The 2.2V fixed output eliminates external resistor networks needed for adjustable versions. Verify that the load transient requirements are met by the recommended ceramic output capacitor values. Consider the thermal resistance characteristics of the U-DFN2020-6 package for heat dissipation planning.

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

This part belongs to the AP7347E family of 500mA high PSRR low noise LDO regulators. It is designed based on a CMOS process and includes internal voltage reference, error amplifier, and current limit circuits. The product line supports both fixed and adjustable output voltages ranging from 1.0V to 5.0V across various package options.

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

AP7347E-22FDCW-7R

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

How does the Power-Good (PG) pin indicate status?

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

What is the function of the EN pin if not used for control?

If the enable feature is not utilized, the EN pin should be tied to the VIN pin to keep the regulator output on continuously. It must not be left floating.

How is short-circuit protection implemented?

When the VOUT pin is shorted to GND, the short-circuit protection triggers and clamps the output current to approximately 180mA via fold-back current limiting to prevent overheating damage.