FAN53611AUC205X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN53611AUC205X is a fixed-output synchronous buck regulator manufactured by Fairchild Semiconductor, now part of ON Semiconductor. It operates within an input voltage range of 2.3 V to 5.5 V and provides a fixed output of 2.05 V with a maximum continuous output current of 1 A. The device features a 6 MHz fixed switching frequency and utilizes proprietary architecture to achieve peak efficiency of 92%. It maintains over 80% efficiency at load currents as low as 1 mA. The component is housed in a compact 6-bump WLCSP package with a 0.4 mm pitch, measuring approximately 0.86 x 1.16 x 0.378 mm. It supports operation temperatures from -40 °C to +85 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous rectification architecture for high efficiency across light to heavy loads
• Low ripple light-load PFM mode combined with forced PWM operation
• Internal soft-start and comprehensive protection including thermal shutdown and UVLO

Voltage Regulators - DC DC Switching Regulators Applications

• 3G, 4G, WiFi, WiMAX, and WiBro data cards
• Tablets and ultra-mobile PCs
• Digital still cameras (DSC) and digital video cameras (DVC)

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix '205X' confirms the 2.05 V fixed output voltage variant. Confirm manufacturer status as ON Semiconductor following the acquisition of Fairchild Semiconductor. Check datasheet revision history for any pinout or electrical parameter updates. Ensure compatibility with RoHS3 and REACH compliance requirements for the target assembly process.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 2.05 V rail is required from a 2.3-5.5 V source. The 1 A current capability suits moderate power applications. Consider the 6 MHz frequency for smaller passive components compared to lower-frequency alternatives. Evaluate the WLCSP footprint constraints against available PCB real estate. Compare quiescent current specifications if battery life optimization is critical for the end application.

Voltage Regulators - DC DC Switching Regulators Part Context

The FAN53611 belongs to a family of synchronous buck regulators that includes the FAN53601 (600 mA version). These devices share similar architectural features but differ in current handling capabilities. The FAN53611 series is designed for portable electronics requiring efficient power conversion in minimal space. The product line emphasizes best-in-class transient response and efficiency metrics suitable for mobile computing platforms.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public confirmed substitute part numbers are not provided in the available documentation.