AP7348D-1528RS4-7

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

The AP7348D-1528RS4-7 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 1.5V 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 quiescent current across all channels.

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

• Four independent LDO 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.
• High power supply rejection ratio and low output noise suitable for noise-sensitive RF applications.
• Integrated thermal shutdown and foldback current limiting for each channel to ensure operational safety.

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-and-reel quantity. Confirm that the dual-output configuration matches the required 1.5V and 2.8V levels. Ensure compatibility with RoHS 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 regulated rails are needed in a compact footprint. The dual-enable architecture simplifies power sequencing for paired channels. Verify that total power dissipation remains within limits given the 600mW maximum rating. Consider the low ESR ceramic capacitor requirements for stability under varying load conditions.

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

This part belongs to the AP7348 family of high PSRR low noise LDOs. It shares the same package and general electrical characteristics with variants offering different fixed voltage combinations. The 'D' suffix indicates the presence of output discharge functionality, while the numeric codes define the specific output voltages for each channel pair.

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

AP7348D-1815RS4-7 offers swapped voltage outputs (1.8V/1.5V). AP7348D-1218RS4-7 provides 1.2V and 1.8V outputs. Single-channel alternatives like AP7340 series require additional board space. Verify pinout and thermal pad connectivity remain identical before substitution.

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 disables the associated channels and activates their internal discharge circuits.

What is the maximum power dissipation?

The maximum power dissipation is 600mW. Exceeding this limit triggers the thermal shutdown protection, which disables all four channels simultaneously.