FAN48623UC315X

Overview

The FAN48623UC315X is a synchronous TinyBoost regulator from onsemi, designed to provide a regulated output from a single lithium-ion battery even when the input voltage drops below the required system level. It features a bypass mode for high efficiency at light loads and supports an output current of 2.5 A. The device operates with a fixed switching frequency of 2.5 MHz and includes a low quiescent current of 55 µA. It is housed in a compact 16-pin WLCSP package suitable for space-constrained mobile applications.

Feature Summary

• Synchronous step-up topology ensures high conversion efficiency across load ranges.
• Integrated bypass mode allows direct power path connection for improved light-load efficiency.
• Maintains regulation when input voltage falls below the programmed output voltage level.

Applications

• Smartphones and mobile phones
• Tablets and portable media players
• Personal digital assistants (PDAs)
• GPS navigation devices

Procurement Notes

Verify the specific suffix '315X' confirms the 3.15V fixed output variant. Confirm the WLCSP-16 package type matches your PCB footprint requirements. Ensure compatibility with the 2.5 MHz switching frequency regarding EMI constraints. Check RoHS compliance status as indicated in the official datasheet.

Selection Notes

Select this component when a fixed 3.15V output is required from a single-cell Li-ion source. Consider the 2.5A current capability against peak system demands. Evaluate the small WLCSP footprint against available board space. Verify that the 2.5 MHz frequency aligns with passive component selection and noise sensitivity.

Part Context

This part belongs to the FAN48623 series of TinyBoost regulators. It is engineered for portable electronics requiring efficient power management from single-cell batteries. The series emphasizes miniaturization and performance in tight spaces.

Replacement Considerations

Check for other variants within the FAN48623 family offering different fixed output voltages if 3.15V is not strictly required. Verify pinout compatibility before substituting with similar synchronous boost regulators from other manufacturers.

FAQ

What is the fixed output voltage of the FAN48623UC315X?

The FAN48623UC315X provides a fixed output voltage of 3.15V.

Does the FAN48623UC315X support operation when the battery voltage is lower than the output?

Yes, it is designed to regulate the output even when the input battery voltage drops below the minimum required system voltage.