AP7346D-3318FS6-7

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

The AP7346D-3318FS6-7 is a dual low dropout regulator manufactured by Diodes Incorporated, housed in an X2-DFN1212-6 package. It provides fixed output voltages of 3.3V on Channel 1 and 1.8V on Channel 2. The device supports an input voltage range from 1.7V to 5.25V with a maximum output current of 130mA per channel. Key electrical characteristics include a ripple rejection ratio of 75dB at 1kHz, output voltage accuracy of ±1%, and a quiescent current as low as 35µA. It operates within a temperature range of -40°C to +85°C.

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

• Dual-channel architecture providing independent 3.3V and 1.8V outputs for compact system designs.
• Integrated enable inputs allow precise power management and shutdown control for each channel.
• High ripple rejection capability ensures clean power delivery for sensitive RF and communication circuits.
• Built-in short-circuit protection safeguards the regulator against overcurrent conditions.

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

• Fingerprint modulars
• Smart phones and tablets
• RF supplies
• Cameras
• Portable media players

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

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific environmental declarations such as halogen-free requirements. Ensure the ordering suffix matches the required tape and reel packaging specifications for automated assembly processes.

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

Evaluate the requirement for dual independent rails versus single rail solutions to optimize board space. Consider the thermal dissipation capabilities of the X2-DFN1212-6 package relative to the expected load currents. Verify that the input voltage range aligns with the available power supply rails in the target application environment.

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

This component belongs to the AP7346 series of dual high-accuracy current limit LDOs. It utilizes a CMOS process to achieve low output noise and high PSRR. The series is designed for dense PCB layouts in portable electronics, offering a small footprint while maintaining robust performance under varying load conditions.

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

The datasheet explicitly states that the AP7346 is not recommended for new designs and recommends using the AP7345D instead. Verify pin compatibility and electrical specifications when considering alternative components from other manufacturers.

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

What is the function of the EN pins on this device?

The EN1 and EN2 pins serve as enable inputs for Channel 1 and Channel 2 respectively. Driving these pins high enables the respective output, while pulling them low puts the regulator into shutdown mode.

How does the device handle short-circuit conditions?

When an output pin is shorted to ground, short-circuit protection is triggered, clamping the output current to approximately 60mA to protect the regulator from damage due to overheating.