FAN4800CNY

Overview

The FAN4800CNY is a synchronous buck controller from Fairchild Semiconductor designed for high-efficiency power conversion. It integrates a high-side and low-side MOSFET driver with a PWM control loop. The device supports input voltages up to 36V and delivers output currents suitable for point-of-load applications. Key electrical characteristics include a switching frequency range adjustable via an external resistor, typically operating between 100kHz and 500kHz. It features programmable soft-start, over-current protection, and thermal shutdown capabilities to ensure robust operation in demanding environments.

Feature Summary

• Integrated synchronous rectification driver for enhanced efficiency
• Built-in over-current and thermal protection mechanisms
• Adjustable switching frequency for optimized design flexibility

Applications

• Point-of-load voltage regulation modules
• Industrial equipment power supplies
• Telecommunications infrastructure power systems

Procurement Notes

Verify the manufacturer date code and lot traceability upon receipt. Ensure the component matches the exact suffix 'CNY' for tape-and-reel packaging specifications. Check for physical damage to pins and verify that the marking on the top surface corresponds to the Fairchild Semiconductor branding and part number to avoid counterfeit risks.

Selection Notes

Select this controller when designing synchronous buck converters requiring integrated gate drivers and protection features. Consider its input voltage range and maximum current capability relative to the target load requirements. Evaluate the need for external components such as timing resistors and inductors based on the desired switching frequency and output ripple specifications.

Part Context

This component belongs to the FAN4800 series of synchronous buck controllers. It is part of Fairchild's portfolio of power management solutions aimed at improving system efficiency and reducing board space. The series is commonly used in applications where reliable DC-DC conversion is critical for system stability and performance.

Replacement Considerations

Direct replacements may include other synchronous buck controllers from Fairchild or alternative manufacturers with similar pinouts and electrical characteristics. Verify compatibility regarding input voltage range, switching frequency limits, and package dimensions before substitution.