FAN5646S701X

Overview

The FAN5646S701X is a monolithic linear integrated circuit functioning as a three-channel switching regulator control IC manufactured by onsemi. It operates within a supply voltage range of 1.8 V to 11 V, supporting low-voltage applications. The device features an output sync current capability up to 30 mA and provides a reference voltage output current ranging from 0 to 1 A. Timing parameters include a resistor range of 3 to 30 kΩ and a timing capacity between 100 pF and 1000 pF, establishing an oscillation frequency (fOSC) determined by external components.

Feature Summary

• Integrates three independent switching regulator control channels within a single monolithic package
• Operates effectively at low supply voltages starting from 1.8 V
• Provides adjustable timing control via external resistor and capacitor networks

Applications

• Multi-rail power supply systems requiring synchronized regulation
• Portable electronic devices with strict low-voltage operational constraints
• Embedded systems utilizing multiple DC-DC conversion stages

Procurement Notes

Verify the specific suffix 'S701X' against official onsemi documentation to confirm tape and reel specifications or marking codes. Ensure the procurement source provides valid traceability for automotive or industrial grade requirements if applicable. Cross-reference the datasheet revision date to confirm compatibility with current manufacturing standards and RoHS compliance status.

Selection Notes

Select this component when designing circuits requiring three distinct regulated outputs controlled by a single IC. The 1.8 V minimum operating voltage makes it suitable for battery-powered applications where input voltage drops significantly. Designers must calculate external RT and CT values to set the desired switching frequency within the specified operational limits.

Part Context

This part belongs to the LA/FAN series of switching regulator control ICs from onsemi. These controllers are designed to manage power conversion efficiency in compact form factors. The three-channel architecture allows for simplified board space utilization compared to using separate single-channel controllers for each rail.

Replacement Considerations

Consult onsemi technical support for verified direct replacements. Generic equivalents may not match the specific 3-channel synchronization or low-voltage startup characteristics required by the original design.