AP7348D-2833RS4-7

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

The AP7348D-2833RS4-7 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 2.8V on channels 1 and 2, and 3.3V 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 quiescent current.

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

• Four independent regulated channels with individual error amplifiers and resistor networks for fixed voltage outputs.
• Dual enable inputs allowing simultaneous control of paired channels with integrated auto-discharge circuits upon shutdown.
• Integrated thermal shutdown protection that disables all channels during overtemperature conditions.
• Foldback current limiting protects against short-circuit events by clamping output current.

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-and-reel quantity. Ensure the internal voltage codes match the required 2.8V and 3.3V outputs. Confirm RoHS compliance status if required by your manufacturing standards. Check for any automotive qualification requirements if deploying in vehicle systems.

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

Select this component when multiple isolated power rails are needed from a single input source. The dual enable pins allow synchronized power sequencing for paired channels. Verify that total power dissipation remains below 600mW despite individual channel capabilities. Ensure adequate PCB copper area is allocated for the thermal pad to maintain junction temperature limits.

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

This part belongs to the AP7348 family of high PSRR low noise LDOs designed for low power handheld communication equipment. The series offers various fixed voltage combinations across its four channels while maintaining a compact footprint suitable for dense PCB layouts.

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

Public confirmed substitute part numbers: None identified in official documentation.

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 initiates shutdown and activates the discharge circuit.

What happens during a thermal fault condition?

Each channel has independent over-temperature sensing. If a temperature fault occurs, all four channels are disabled to protect the device.