AP7347E-105FDCWR-7R

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

The AP7347E-105FDCWR-7R is a low dropout regulator manufactured by Diodes Incorporated, featuring a fixed 1.05V output voltage and housed in a U-DFN2020-6 (SWP) package with code FDCWR. It operates within an input voltage range of 1.7V to 5.5V and guarantees a continuous output current of 500mA. The device provides ±1% output voltage accuracy across the full operating temperature range of -40°C to +125°C. Key electrical specifications include a 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.

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

• Integrated power-good indicator for supply monitoring and sequencing
• Active output discharge function for controlled shutdown states
• Fold-back short-circuit current limiting and thermal shutdown protection

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 suffix '7R' corresponds to tape-and-reel packaging when sourcing. Confirm that the FDCWR package variant matches the required footprint for PCB layout. Ensure the fixed 1.05V output aligns with system requirements, as adjustable versions utilize different ordering codes. Cross-reference the manufacturer's latest datasheet revision for any updates to absolute maximum ratings or thermal characteristics before finalizing procurement.

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

Select this component for applications demanding high power supply rejection ratio and low output noise. The inclusion of a power-good pin facilitates system sequencing and fault detection. Verify that the input voltage remains within the 1.7V to 5.5V range under all operating conditions. Consider the thermal resistance values provided in the datasheet to ensure adequate heat dissipation through the exposed pad for reliable operation at maximum load currents.

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

This part belongs to the AP7347E series of 500mA high PSRR low noise LDOs. Unlike the AP7347DQ, the AP7347E includes a dedicated power-good indicator pin. It is available in U-DFN2020-6 and V-DFN3030-8 packages. The series supports both fixed and adjustable output voltages, catering to diverse power management needs in portable and industrial electronics.

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

AP7347E-105FDCW-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 is the output voltage set for this fixed version?

For the AP7347E-105FDCWR-7R, the output voltage is internally fixed at 1.05V. No external resistor divider is required, unlike the adjustable versions which use the FB pin.