FAN5361UC123X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN5361UC123X is a synchronous buck regulator manufactured by ON Semiconductor, operating at a fixed switching frequency of 6MHz. It delivers a fixed output voltage of 1.233V with a maximum continuous output current capability of 1A. The device supports an input voltage range from 2.3V to 5.5V. It utilizes pulse width modulation control and features a compact 6-WLCSP package measuring approximately 1.23mm by 0.88mm. The component operates within a temperature range of -40°C to 85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous rectification architecture for improved efficiency
• Fixed-frequency operation at 6MHz
• Compact 6-ball WLCSP packaging

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics power management
• Embedded systems requiring stable low-voltage rails
• Battery-powered devices needing efficient DC-DC conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation carefully, as the part number is currently associated with ON Semiconductor rather than Fairchild Semiconductor. Confirm the specific output voltage variant (1.233V) matches the design requirement, as other variants in the series exist. Check the component status, as related parts in this family have been marked as obsolete or end-of-life in recent distributor records. Ensure the 6-WLCSP footprint aligns with the PCB layout specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.233V output is required with up to 1A load current. The 6MHz switching frequency allows for smaller external passive components compared to lower-frequency regulators. Consider the thermal performance within the small WLCSP package under high load conditions. Verify compatibility with the system's input voltage range of 2.3V to 5.5V. This part is suitable for space-constrained applications where synchronous rectification efficiency is critical.

Voltage Regulators - DC DC Switching Regulators Part Context

The FAN5361 series includes various output voltage options such as 1.2V and 1.233V, all sharing the same 6MHz synchronous buck topology. The FAN5361UC123X specifically provides the 1.233V rail. Other family members like the FAN53611 offer similar performance but may differ in exact electrical characteristics or package details. The series is designed for portable applications requiring high efficiency in a minimal footprint.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Related parts in the FAN5361 family share similar specifications but may have different output voltages. Verify pinout and electrical parameters before substituting with any alternative.