FAN5240QSCX

Special Purpose Regulators Overview

The FAN5240QSCX is a dual-phase synchronous buck controller designed for mobile CPU core power applications. It features an integrated 5-bit DAC for dynamic voltage setting within a 0.925V to 2.0V output range. The device supports a 6V to 24V input voltage range and utilizes average current mode control with active droop for balanced phase currents. Key electrical parameters include a reference accuracy of ±1% over temperature, high efficiency up to 90% under wide load conditions, and built-in fault protection mechanisms such as overvoltage, overcurrent, and thermal shutdown.

Special Purpose Regulators Feature Summary

• Integrates a 5-bit digital-to-analog converter for precise dynamic voltage adjustment
• Employs average current mode control with active droop for optimal phase balancing
• Supports transition between fixed-frequency PWM and hysteretic modes for light-load efficiency

Special Purpose Regulators Applications

• AMD Mobile Athlon CPU VCORE regulators
• Graphics chip VCORE regulators
• Mobile processor core power supplies

Special Purpose Regulators Procurement Notes

Verify the Q suffix indicates automotive or extended temperature qualification relative to the standard commercial variant. Confirm the SCX suffix corresponds to the TSOP-28 tape-and-reel packaging format. Cross-reference the specific revision level against the manufacturer's latest datasheet to ensure compatibility with target system requirements.

Special Purpose Regulators Selection Notes

Select this component for designs requiring efficient power delivery to low-voltage, high-current processors in space-constrained mobile environments. The integrated DAC simplifies voltage scaling without external resistors. Ensure the application benefits from the automatic transition to hysteretic mode for improved battery life during idle periods compared to fixed-frequency controllers.

Special Purpose Regulators Part Context

This part belongs to the FAN5240 family of multi-phase PWM controllers. It is specifically engineered to meet the stringent transient response and efficiency demands of modern mobile computing platforms. The controller manages external N-channel MOSFETs to create a synchronous buck topology, serving as a critical power management element in laptop and handheld device architectures.

Special Purpose Regulators Replacement Considerations

The FAN5240SCX serves as the commercial-grade equivalent. Verify pinout compatibility and software configuration settings when substituting. Check for any differences in thermal performance or operating temperature ranges between the qualified and commercial versions.