AP7348D-3028RS4-7

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

The AP7348D-3028RS4-7 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 3.0V on Channels 1 and 2, and 2.8V on Channels 3 and 4. Each channel supports up to 300mA output current with ±1% accuracy. The device operates within a 1.7V to 5.25V input range, features 75dB ripple rejection at 1kHz, and consumes typically 160µA total quiescent current when all channels are enabled.

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

• Four independent LDO channels with integrated enable control via two pins
• High power supply ripple rejection for noise-sensitive applications
• Integrated thermal shutdown and foldback short-circuit protection per channel
• Low output noise voltage suitable for RF and communication modules

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

• Smartphones and tablets
• WIFI access points
• Communication modules
• Camera modules and appliances
• RF supply for IoT/LPWAN devices

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 that the internal resistor network matches the required 3.0V and 2.8V outputs. Ensure compliance with RoHS and halogen-free requirements if mandated by the target application standards.

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

Select this component when multiple regulated rails are needed in a compact footprint. Verify that the combined power dissipation across all active channels remains below the 600mW limit to prevent thermal shutdown. Ensure input voltage stays within the 1.7V to 5.25V operating range for stable regulation.

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

This part belongs to the AP7348 family of multi-channel LDOs designed for portable electronics. It utilizes a CMOS process to achieve low dropout and high PSRR. The device integrates two voltage references and error amplifiers for each channel, allowing for precise voltage regulation in space-constrained designs.

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

Check datasheet compatibility for pinout and electrical characteristics before substituting. Verify that alternative parts support the same 300mA per channel requirement and fit the X1-DFN1612-8 package.

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 an auto-discharge circuit.

What happens during a thermal fault condition?

If the junction temperature exceeds the thermal shutdown threshold, all four channels are disabled to protect the device from overheating.