AP7347E-33FDCW-7R

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

The AP7347E-33FDCW-7R is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a stable 3.3V output with ±1% accuracy. It operates within an input voltage range of 1.7V to 5.5V and delivers up to 500mA of guaranteed output current. The device features a 75dB ripple rejection ratio at 1kHz and maintains a low output noise of 60µVrms from 10Hz to 100kHz. Quiescent current is specified as low as 75µA. It includes a power-good indicator, active output discharge, and thermal shutdown protection, housed in a U-DFN2020-6 (SWP) package.

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

• Integrated power-good open-drain output for supply monitoring and sequencing
• Active output discharge function ensures known system startup states when disabled
• Fold-back short-circuit current limit protects against overcurrent and overheating
• Thermal shutdown circuitry disables the output at high junction temperatures

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 type. Confirm the suffix indicates tape and reel packaging. Ensure compatibility with RoHS and halogen-free requirements if mandated by your design specifications. Cross-reference the manufacturer's ordering information to validate the exact configuration before procurement.

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

Select this component for designs requiring high PSRR and low noise in compact form factors. The U-DFN2020-6 package offers high power density suitable for space-constrained layouts. Consider the 75µA quiescent current for standby power efficiency. Verify that the load transient response meets the specific dynamic requirements of the target application circuit.

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

This component belongs to the AP7347E series of low dropout regulators featuring high power supply rejection ratios and low output noise. The series supports both fixed and adjustable output voltages across various packages. It is designed for noise-sensitive equipment where stable power delivery under varying load conditions is critical.

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 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 device handle short circuits?

When the output is short-circuited to ground, the internal protection circuit triggers and clamps the output current to approximately 180mA, protecting the regulator from damage due to overheating.