S-8521D18MC-BXDT2U

Overview

The S-8521D18MC-BXDT2U is a step-down DC-DC switching controller manufactured by ABLIC Inc. It operates at a fixed frequency of 60kHz and features a typical quiescent current of 21uA. The device is housed in an SOT-23-5 package and supports surface-mount installation. Designed for positive output applications, it functions as a buck regulator controller within the power management IC category.

Feature Summary

• Step-down DC-DC switching controller topology
• Fixed 60kHz switching frequency operation
• Low quiescent current consumption design

Applications

• Buck regulator circuit design
• Positive output voltage regulation systems
• Power management integrated circuits

Procurement Notes

Verify component status carefully as multiple sources indicate this part may be obsolete or end-of-life. Confirm availability with authorized distributors before procurement. Ensure compatibility with existing PCB layouts due to the SOT-23-5 package constraints. Check for potential supply chain disruptions given the limited stock reports found across various channels.

Selection Notes

Select this component for applications requiring a dedicated buck controller with low standby current. Consider the fixed 60kHz frequency when designing external passive components. Evaluate thermal performance requirements for the SOT-23-5 package. Verify input voltage range compatibility with system specifications prior to integration into new designs.

Part Context

This part belongs to the ABLIC series of switching controllers designed for efficient power management. It complements other PMIC offerings from the manufacturer, providing specialized buck regulation capabilities. The SOT-23-5 form factor allows for compact board space utilization in portable and embedded electronic devices requiring regulated power supplies.

Replacement Considerations

• XC6118N40BMR-G