AP7348D-2812RS4-7

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

The AP7348D-2812RS4-7 is a four-channel low dropout regulator from Diodes Incorporated, housed in an X1-DFN1612-8 package. It provides fixed output voltages of 2.8V on channels 1 and 2, and 1.2V on channels 3 and 4. Each channel supports up to 300mA output current with a total input voltage range of 1.7V to 5.25V. The device features 75dB ripple rejection at 1kHz, 60µVrms output noise, and 1% output accuracy. Quiescent current is typically 160µA when all channels are active.

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

• Four independent LDO channels with dual enable pins for grouped control
• Integrated auto-discharge circuitry for rapid output voltage decay upon shutdown
• Per-channel over-temperature sensing and foldback short-circuit protection
• CMOS-based design ensuring low power consumption and high line regulation

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 Type B package and tape-and-reel packaging format. Ensure the part number accurately reflects the required 2.8V and 1.2V output configuration for channels 1/2 and 3/4 respectively. Confirm RoHS compliance and lead-free status requirements match project specifications before finalizing procurement orders.

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

Select this component when multiple distinct voltage rails are needed within a compact footprint. The dual enable architecture allows simultaneous control of paired channels, simplifying system power sequencing. Verify that the combined thermal dissipation across all four channels remains within the 600mW limit to prevent thermal shutdown activation during peak load conditions.

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

This device belongs to the AP7348 family of multi-channel regulators designed for space-constrained portable electronics. It utilizes a CMOS process to achieve low quiescent current and high power supply rejection ratio. The integrated discharge feature ensures safe system states during power-down cycles, making it suitable for battery-operated communication devices requiring efficient power management.

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

AP7348D-2818RS4-7: Offers identical package and pinout but provides 1.8V on Channel 2 instead of 1.2V.

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

How does the enable pin configuration operate?

EN1 controls Channels 1 and 3 simultaneously, while EN2 independently controls Channels 2 and 4.

What happens to the outputs when the device is disabled?

An internal discharge circuit automatically pulls the output voltages down to ensure a known state.