AP7348D-3612RS4-7

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

The AP7348D-3612RS4-7 is a four-channel low dropout regulator manufactured by Diodes Incorporated. It provides fixed output voltages of 3.6V on channels 1 and 2, and 1.2V 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 specifications 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 features independent enable controls, foldback current limiting, and thermal shutdown protection.

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

• Four independent LDO channels with individual error amplifiers and discharge circuits
• Dual enable inputs allowing separate control of channel pairs for power management
• Integrated short circuit protection with foldback current limiting and per-channel thermal shutdown
• Low output noise and high power supply ripple rejection suitable for sensitive RF applications

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 corresponds to the X1-DFN1612-8 package and tape & reel packaging configuration. Confirm that the internal marking code GBH matches the required 3.6V/1.2V output combination. Ensure compliance with RoHS 3 and Halogen-free requirements if mandated by the target market regulations.

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 architecture allows for coordinated power sequencing or independent channel activation. Verify that the combined power dissipation across all active channels remains below the 600mW limit to prevent thermal shutdown during operation.

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

This part belongs to the AP7348 series of four-channel LDOs designed for space-constrained portable electronics. It utilizes a CMOS process to achieve low quiescent current and high PSRR. The device is housed in an X1-DFN1612-8 (Type B) package, which facilitates dense PCB layouts while providing adequate thermal performance through a dedicated thermal pad.

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

AP7348D-3636RS4-7

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

How are the four channels controlled?

The device has two enable pins: EN1 controls Channel 1 and Channel 3, while EN2 controls Channel 2 and Channel 4.

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 rapidly remove charge from the output capacitors.