FAN8303MX

Voltage Regulators - DC DC Switching Regulators Overview

The FAN8303MX is a monolithic, non-synchronous step-down DC/DC regulator manufactured by onsemi. It integrates internal power MOSFETs to deliver a continuous output current of 2A over a wide input supply range from 5V to 23V. The device operates at a fixed switching frequency of 370kHz and provides an adjustable output voltage ranging from 0.6V to 20V. It features cycle-by-cycle current limiting and thermal shutdown for fault protection. The component is housed in an 8-pin SOIC package with a maximum operating temperature of 85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates internal power MOSFETs for simplified design
• Provides fast transient response via current-mode operation
• Includes comprehensive fault protection mechanisms

Voltage Regulators - DC DC Switching Regulators Applications

• Set-top boxes
• DSL and cable modems
• Distributed power systems
• Consumer appliances such as DVD players
• Auxiliary power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix and revision level against the official datasheet to ensure compatibility with required input voltage ranges and packaging formats. Confirm RoHS compliance status and check for any obsolescence notices or lifecycle changes directly from onsemi documentation before finalizing procurement plans.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for applications requiring a compact, non-synchronous buck solution with integrated switches. Ensure the load current does not exceed the 2A continuous rating and that the input voltage remains within the specified 5V to 23V window. Verify that the external capacitor selection supports stability with low ESR requirements.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the FAN8303 series of step-down regulators. It is functionally similar to the FAN8301 but differs in input voltage specifications and synchronous vs. non-synchronous topology. The MX suffix indicates the surface-mount SOIC package variant distributed by onsemi following its acquisition of Fairchild Semiconductor assets.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include the FAN8303MXCT and FAN8303MXTR variants which share identical electrical characteristics but differ in tape-and-reel packaging configurations.