AP7348D-3330RS4-7

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

The AP7348D-3330RS4-7 is a four-channel low dropout regulator from Diodes Incorporated, housed in an X1-DFN1612-8 package. It provides fixed output voltages of 3.3V on channels 1 and 2, and 3.0V on channels 3 and 4. Each channel supports up to 300mA output current with a total input voltage range of 1.7V to 5.25V. The device features 75dB ripple rejection at 1kHz, 60µVrms output noise, and 1% output accuracy. Quiescent current is typically 160µA when all channels are enabled.

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

• Four independent LDO channels with individual error amplifiers and resistor networks for fixed voltage outputs.
• Dual enable inputs (EN1 and EN2) allowing grouped control of channels with integrated auto-discharge circuits upon shutdown.
• High power supply rejection ratio and low output noise suitable for noise-sensitive RF and communication applications.
• Integrated protection mechanisms including per-channel thermal shutdown, foldback short-circuit current limiting, and overcurrent protection.

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

• Smart Phone/Tablet
• WIFI Access Points
• Communication Module
• Camera Module, Appliances
• RF Supply for IOT/LPWAN

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

Verify the specific ordering suffix RS4-7 corresponds to the X1-DFN1612-8 package and tape-and-reel quantity. Confirm RoHS compliance and lead-free status against the manufacturer's latest quality definitions. Ensure the selected part number matches the required output voltage combination of 3.3V and 3.0V across the four channels.

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

Select this component when multiple regulated rails are needed in a compact footprint. The dual enable pins allow synchronized control of half the channels. Verify that the total power dissipation remains within the 600mW limit despite individual channel capabilities. Consider the 160µA quiescent current impact on standby power consumption.

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

This part belongs to the AP7348 family of high PSRR low noise LDOs. It utilizes a CMOS process and includes two voltage references. The device is designed for low power handheld communication equipment, offering a small footprint via the X1-DFN1612-8 Type B package.

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

AP7348D-3333RS4-7

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

How are the four channels controlled?

Channels 1 and 3 are controlled by EN1, while Channels 2 and 4 are controlled by EN2. Pulling an enable pin low shuts down its associated channels and activates the discharge circuit.

What happens during a short circuit condition?

Short circuit protection triggers and clamps the output current to approximately 55mA to protect the regulator from overheating.