AP7348D-2825RS4-7

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

The AP7348D-2825RS4-7 is a four-channel low dropout regulator manufactured by Diodes Incorporated. It provides fixed output voltages of 2.8V on channels 1 and 2, and 2.5V on channels 3 and 4. The device operates with an input voltage range from 1.7V to 5.25V and delivers up to 300mA per channel. Key electrical characteristics include a ripple rejection ratio of 75dB at 1kHz, an output noise of 60µVrms (10Hz to 100kHz), and a total quiescent current of typically 160µA. It features independent enable controls, foldback current limiting, and thermal shutdown protection.

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

• Four integrated LDO channels providing simultaneous power rails with high output voltage accuracy.
• Dual enable inputs allowing independent control over paired output channels for power management.
• Integrated discharge circuitry that actively discharges outputs when the device is disabled.
• Built-in protection mechanisms including foldback short-circuit current limiting and per-channel thermal shutdown.

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 type and tape-and-reel packaging configuration. Ensure the part number matches the required output voltage combination of 2.8V for channels 1 and 2, and 2.5V for channels 3 and 4. Confirm compliance with RoHS and halogen-free requirements if specified for the target assembly process.

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

Select this component when multiple regulated rails are needed in a compact footprint. The dual enable pins allow for synchronized or staggered power sequencing between channel pairs. Verify that the total power dissipation across all four channels remains within the 600mW limit to avoid triggering thermal shutdown during peak load conditions.

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

This device belongs to the AP7348 family of multi-channel LDOs designed for space-constrained portable electronics. It utilizes a CMOS process to achieve low quiescent current and high PSRR. The X1-DFN1612-8 package provides a small surface-mount form factor suitable for dense PCB layouts in modern handheld devices.

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

AP7348D-2818RS4-7

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

How are the four output channels controlled?

The device has two enable inputs: EN1 controls Channel 1 and Channel 3, while EN2 controls Channel 2 and Channel 4. Driving these pins high enables the respective channels.

What happens to the outputs when the device is disabled?

When disabled via the enable pins, the associated channels activate an internal discharge circuit to ensure the outputs drop to a known state.