AP7348D-3030RS4-7

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

The AP7348D-3030RS4-7 is a four-channel low dropout regulator from Diodes Incorporated, housed in an X1-DFN1612-8 (Type B) package. It provides fixed 3.0V outputs on all channels with a maximum output current of 300mA per channel. The device operates within a wide input voltage range of 1.7V to 5.25V and features high ripple rejection of 75dB at 1kHz. Total quiescent current is typically 160µA when all channels are enabled. It includes independent enable controls, foldback current limiting, and thermal shutdown protection.

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

• Four independent LDO channels providing fixed 3.0V outputs with ±1% accuracy
• Dual enable inputs allowing grouped control of CH1/CH3 and CH2/CH4
• Integrated auto-discharge circuitry for rapid output voltage decay upon shutdown
• Built-in overcurrent and thermal protection mechanisms for system safety

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

• Smart Phone/Tablet power distribution
• 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 & reel packaging configuration. Confirm that the D suffix indicates the inclusion of the output discharge feature. Ensure compatibility with RoHS and halogen-free requirements if mandated by your manufacturing standards. Cross-reference the datasheet revision to ensure alignment with current design specifications.

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

Select this component when multiple stable 3.0V rails are required from a single input source. The dual enable architecture simplifies power sequencing for paired channels. Consider the total power dissipation limits alongside individual channel currents to prevent thermal shutdown. Verify that the input voltage remains within the specified operating range under all load conditions.

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. The series offers various fixed voltage combinations to support diverse logic levels. The X1-DFN1612-8 package facilitates dense PCB layouts while maintaining adequate thermal performance for standard consumer applications.

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

AP7348D-3028RS4-7: Provides 3.0V on CH1/CH2 and 2.8V on CH3/CH4.

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

How are the four channels controlled?

The device uses two enable pins. EN1 controls Channel 1 and Channel 3 simultaneously, while EN2 controls Channel 2 and Channel 4 independently.

What happens to the output voltage when the device is disabled?

The integrated discharge circuit actively pulls the output voltage down to ensure a known state during shutdown.