AP7348D-1815RS4-7

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

The AP7348D-1815RS4-7 is a four-channel low dropout regulator from Diodes Incorporated, housed in an X1-DFN1612-8 (Type B) package. It provides fixed output voltages of 1.8V on channels 1 and 2, and 1.5V 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 a typical ripple rejection of 75dB at 1kHz and a low output noise of 60µVrms across the 10Hz to 100kHz bandwidth. Quiescent current is typically 160µA when all channels are enabled.

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

• Four independent regulated channels with individual error amplifiers and discharge circuits
• Dual enable inputs allowing grouped control of specific output channels
• Integrated thermal shutdown and foldback short-circuit protection for each channel

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 that the component matches the exact part number AP7348D-1815RS4-7, specifically confirming the 1.8V and 1.5V output configuration. Ensure the package type is X1-DFN1612-8 (Type B). Confirm RoHS compliance and Halogen-free status as specified by the manufacturer. Check datasheet revision DS42124 Rev. 3 - 2 for any updates.

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

Select this component when multiple distinct low-voltage rails are required within a compact footprint. The dual enable pins allow synchronized power-up or shutdown for paired channels. Verify that the total power dissipation remains below 600mW to prevent triggering thermal shutdown. Ensure adequate ceramic capacitors are placed near the device for stability.

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

This device belongs to the AP7348 series of low dropout regulators designed for low-power handheld communication equipment. It utilizes a CMOS process to achieve high output accuracy and low quiescent current. The series is characterized by its small X1-DFN1612-8 package, which facilitates dense PCB layouts while maintaining robust performance under varying load conditions.

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

AP7348D-1218RS4-7

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

How are the four channels controlled?

The device has two enable inputs: EN1 controls Channel 1 and Channel 3, while EN2 controls Channel 2 and Channel 4.

What happens during a thermal fault condition?

Over-temperature sensing is provided for each channel, and all four channels will be disabled if a temperature fault occurs.