AP7348D-2518RS4-7

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

The AP7348D-2518RS4-7 is a four-channel low dropout regulator from Diodes Incorporated. It provides fixed output voltages of 2.5V on channels 1 and 2, and 1.8V on channels 3 and 4. Each channel delivers up to 300mA with an input voltage range of 1.7V to 5.25V. The device features 75dB ripple rejection at 1kHz and 60µVrms output noise. Quiescent current is typically 160µA when all channels are enabled. It operates between -40°C and +85°C in an X1-DFN1612-8 package.

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 separate control of paired output channels
• Integrated thermal shutdown protection for each channel
• Foldback current limiting to protect against short circuit conditions

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 confirms the X1-DFN1612-8 Type B package and tape and reel packaging quantity. Confirm that the D suffix indicates the presence of auto-discharge functionality on the outputs. Ensure the manufacturer is Diodes Incorporated and check RoHS compliance status before finalizing procurement orders.

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

Select this component when multiple distinct voltage rails are required within a compact footprint. The dual enable pin architecture allows synchronized control of specific channel pairs. Verify that the total power dissipation across all active channels remains within the 600mW limit to prevent thermal shutdown during peak load operations.

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

This part belongs to the AP7348 family of multi-channel LDOs designed for space-constrained portable electronics. It utilizes a CMOS process to achieve high power supply rejection ratios and low quiescent currents. The device integrates two internal voltage references to maintain accuracy across the four independent output channels.

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

AP7348D-1825RS4-7

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

How are the four channels controlled via the enable pins?

EN1 controls Channel 1 and Channel 3 simultaneously, while EN2 controls Channel 2 and Channel 4 independently.

What happens to the outputs when the device is disabled?

When disabled, the associated channels activate an internal discharge circuit to rapidly remove charge from the output capacitors.