AP7347E-18FDCW-7R

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

The AP7347E-18FDCW-7R is a fixed-output low dropout regulator manufactured by Diodes Incorporated, delivering a precise 1.8V output at up to 500mA. It operates within an input voltage range of 1.7V to 5.5V and maintains ±1% output accuracy across the -40°C to +125°C temperature range. The device features a 75dB ripple rejection ratio at 1kHz and a low output noise of 60µVrms from 10Hz to 100kHz. Packaged in a U-DFN2020-6 (SWP) format with code FDCW, it includes an enable pin, power-good indicator, and active output discharge.

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

• Integrated power-good open-drain output for supply monitoring and sequencing
• Active output discharge ensures known system startup states when disabled
• Fold-back current limit protects against short circuits and overheating
• Thermal shutdown disables output above +170°C junction temperature

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 package code matches FDCW for the U-DFN2020-6 form factor. Confirm the suffix -7R indicates tape and reel packaging. Ensure the ordering part number aligns with the required 1.8V fixed output specification. Check datasheet revision DS46688 Rev. 1-2 for latest electrical characteristics.

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

Select this component for applications requiring high PSRR and low noise in compact designs. The U-DFN2020-6 package offers high power density. Verify that the load transient response requirements are met by the recommended 1µF ceramic output capacitor. Ensure the input voltage remains within the 1.7V to 5.5V operating window.

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

This part belongs to the AP7347E series, which provides high output voltage accuracy and low quiescent current. The series supports both fixed and adjustable output voltages ranging from 1.0V to 5.0V. It utilizes a CMOS process and is available in U-DFN2020-6 and V-DFN3030-8 packages.

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

AP7347E-18FDCWR-7R: Same electrical specifications but uses the FDCWR package variant.

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

How is the output voltage set for the AP7347E-18FDCW-7R?

The output voltage is fixed internally at 1.8V. No external resistor divider is required.

What is the function of the PG pin?

The Power-Good (PG) pin is an open-drain output that goes high-impedance when VOUT exceeds the threshold and pulls low if VOUT drops below the threshold or the device is disabled.