FAN48630BUC31JX

Overview

The FAN48630BUC31JX is a synchronous TinyBoost step-up DC-DC converter manufactured by onsemi, formerly Fairchild Semiconductor. It operates at a switching frequency of 2.5 MHz and delivers an output current of 1500 mA. The device features true bypass operation when the input voltage exceeds the target output voltage, enhancing efficiency in specific operating conditions. It includes an internal synchronous rectifier and soft-start functionality with true load disconnect. The regulator supports an input voltage range from 2.35 V to 5.5 V and provides a fixed 3.3 V output. It achieves up to 96% efficiency and is housed in a WLCSP-16 package.

Feature Summary

• True bypass operation activates when input voltage exceeds target output voltage
• Internal synchronous rectifier for improved power conversion efficiency
• Soft-start mechanism incorporates true load disconnect capability

Applications

• Portable electronic devices requiring efficient step-up regulation
• Battery-powered systems utilizing single-cell lithium-ion sources
• Applications necessitating compact power management solutions

Procurement Notes

Verify the manufacturer designation carefully, as Fairchild Semiconductor has been acquired by onsemi. Ensure the part number suffix matches the required package and temperature specifications. Confirm RoHS compliance status through official documentation. Check availability status as some variants may be discontinued or obsolete. Validate that the sourcing channel provides genuine components with traceable origin.

Selection Notes

Select this component when high efficiency and compact size are critical for boost applications. The 2.5 MHz frequency allows for smaller external passive components compared to lower-frequency alternatives. Consider the true bypass feature if the application frequently operates with input voltages near or above the output level. Evaluate the 1500 mA output capability against peak load requirements. Ensure the WLCSP-16 package fits within the available PCB area constraints.

Part Context

This device belongs to the TinyBoost family of synchronous step-up regulators designed for space-constrained portable electronics. It integrates power switches and control logic into a minimal footprint package. The series emphasizes high efficiency across wide load ranges. It targets applications where battery life and physical size are primary design drivers. The technology leverages advanced CMOS processes for low quiescent current operation.

Replacement Considerations

Check for direct pin-compatible upgrades within the onsemi portfolio. Verify electrical parameters match original design requirements. Review thermal performance characteristics for equivalent packages. Confirm availability of alternative manufacturers offering similar synchronous boost topologies.