AP7348D-2818RS4-7

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

The AP7348D-2818RS4-7 is a four-channel low dropout regulator from Diodes Incorporated. It provides fixed output voltages of 2.8V on channels 1 and 2, and 1.8V on channels 3 and 4. The device supports an input voltage range of 1.7V to 5.25V with each channel delivering up to 300mA. Key electrical parameters include a typical ripple rejection of 75dB at 1kHz, an output noise of 60µVrms (10Hz to 100kHz), and a total quiescent current of 160µA. It operates within a temperature range of -40°C to +85°C.

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 allowing independent control of channel pairs with integrated auto-discharge circuits upon shutdown.
• High power supply ripple rejection and low output noise suitable for sensitive RF applications.
• Integrated thermal shutdown and foldback current limiting for comprehensive 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 confirms the X1-DFN1612-8 package and tape & reel packaging format. Ensure the internal marking code matches GA7 for this specific voltage configuration. Confirm RoHS compliance and lead-free status requirements align with project specifications before finalizing procurement orders.

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

Select this component when multiple regulated rails are required in a compact footprint. The dual enable pins allow synchronized control of specific channel groups. Verify that the combined power dissipation across all active channels remains below the 600mW limit to prevent thermal shutdown. Ensure input capacitors meet the minimum 4.7µF recommendation for stability.

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

This part belongs to the AP7348 family of four-channel LDOs manufactured by Diodes Incorporated. The series utilizes a CMOS process to achieve high PSRR and low noise. The D suffix indicates the inclusion of output discharge features. The RS4 package code designates the X1-DFN1612-8 Type B housing, optimized for dense PCB layouts.

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

AP7348D-2825RS4-7

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 high turns on its associated channels, while pulling it low disables them 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 damage due to overheating.