S-8521D28MC-BXNT2U

Overview

The S-8521D28MC-BXNT2U is a step-down DC-DC switching controller manufactured by ABLIC Inc. It operates in a synchronous rectification mode with a fixed switching frequency of 300 kHz. The device features a low quiescent current of 100 uA and supports an input voltage range up to 6 V. It provides a fixed output voltage of 2.8 V and is housed in a compact SOT-23-5 package.

Feature Summary

• Synchronous rectification architecture for improved efficiency
• Fixed 300 kHz switching frequency operation
• Low standby current consumption
• Compact surface-mount packaging

Applications

• Battery-powered portable electronics
• Mobile communication devices
• Consumer handheld instruments

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for end-of-life notices, as availability may be restricted. Ensure the specific suffix matches design requirements before ordering.

Selection Notes

Select this controller when a fixed 2.8 V output is required from a low-voltage source. The synchronous design suits applications prioritizing efficiency over cost. Verify that the external inductor and capacitor values align with the 300 kHz switching frequency specifications.

Part Context

This component belongs to the S-8520/S-8521 series of buck regulators. It shares architectural similarities with other members but differs in output voltage settings and specific pin configurations. The series targets low-power portable applications requiring stable voltage regulation.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer for cross-reference recommendations if obsolescence is a concern.