FAN5099MX

Overview

The FAN5099MX is a power management integrated circuit combining a high-efficiency pulse-width modulated (PWM) controller and an LDO linear regulator controller. It features a step-down synchronous buck topology with one switching output and one linear output. The device operates within a frequency range of 50kHz to 300kHz, providing efficient voltage regulation for portable applications requiring compact design and high energy efficiency.

Feature Summary

• Integrates a PWM controller and an LDO linear regulator into a single package
• Supports synchronous step-down buck conversion topology
• Offers dual-output capability for combined switching and linear regulation

Applications

• Portable electronic devices
• Smartphones
• Tablets

Procurement Notes

Verify the manufacturer source, as Fairchild Semiconductor has been acquired by ON Semiconductor. Confirm that the part number corresponds to the correct legacy or current production version. Check datasheet revisions to ensure compatibility with specific system requirements before procurement.

Selection Notes

Select this component when space constraints and energy efficiency are critical in portable designs. The combination of synchronous buck and LDO outputs allows for simplified bill of materials. Ensure the operating frequency range aligns with the system's electromagnetic interference constraints and thermal management capabilities.

Part Context

This component belongs to the Fairchild/ON Semiconductor power management portfolio. It addresses the need for integrated solutions in mobile electronics, replacing discrete regulator setups. The device reflects industry trends toward miniaturization and improved power density in consumer handheld devices.

Replacement Considerations

Check for direct cross-reference part numbers from ON Semiconductor following the acquisition. Verify pinout compatibility and electrical parameter equivalence if substituting with other PMICs offering similar dual-output configurations.