S-8521D16MC-BXBT2G

Overview

The S-8521D16MC-BXBT2G is a synchronous rectifier DC-DC controller IC manufactured by ABLIC Inc., designed for step-down (buck) voltage regulation applications. It operates with an input voltage range of 2.5V to 16V and supports a fixed switching frequency of 180kHz. The device features a maximum duty cycle of 100% and provides a single positive output configuration via transistor drivers. Packaged in a compact SOT-23-5 format, it is rated for an operating temperature range of -40°C to +85°C. This component integrates control logic for efficient power conversion in space-constrained electronic designs.

Feature Summary

• Synchronous rectification architecture for enhanced efficiency
• Fixed 180kHz switching frequency operation
• 100% maximum duty cycle capability
• Single positive output configuration

Applications

• Portable consumer electronics requiring compact power solutions
• Battery-powered devices utilizing buck conversion
• Embedded systems with limited board space constraints

Procurement Notes

Verify the specific suffix 'BXBT2G' against official ABLIC documentation to confirm package type and tape/reel specifications. Ensure compatibility with existing PCB footprints for the SOT-23-5 package. Confirm RoHS compliance status through current manufacturer declarations before integration into regulated products.

Selection Notes

Select this component when a synchronous buck controller is required within a 16V input limit. The 180kHz frequency offers a balance between component size and efficiency. Verify that the external MOSFETs match the drive requirements of the S-8521 series. Consider thermal performance within the specified -40°C to +85°C ambient range.

Part Context

This part belongs to the S-8520/8521 series of DC-DC controllers from ABLIC Inc. The series is characterized by low standby current and high efficiency. The S-8521 variant specifically includes integrated synchronous rectification, distinguishing it from non-synchronous counterparts in the same family.

Replacement Considerations

Direct substitutes include other parts within the S-8520/8521 series with compatible pinouts and electrical characteristics. Cross-reference with ABLIC's official replacement guide for equivalent packages and voltage ratings.