S-8521B51MC-AUKT2G

Overview

The S-8521B51MC-AUKT2G is a step-down DC-DC switching controller manufactured by ABLIC Inc. It operates with a fixed switching frequency of 60kHz and supports a duty cycle up to 100%. The device accepts a supply voltage range of 2.5V to 10V and provides a single positive output via a transistor driver stage. Designed for surface-mount installation in SC-74A or SOT-753 packages, it functions within an ambient temperature range of -40°C to 85°C.

Feature Summary

• Step-down topology with 100% maximum duty cycle capability
• Fixed 60kHz internal switching frequency
• Integrated enable control feature

Applications

• Portable electronic devices requiring efficient power conversion
• Battery-powered systems utilizing step-down regulation
• General-purpose DC-DC conversion circuits

Procurement Notes

Verify the specific suffix 'AUKT2G' against official ABLIC documentation to confirm package type and tape-and-reel specifications. Confirm current design status as some S-8521 variants are marked not recommended for new designs. Ensure compatibility with required operating temperatures and input voltage ranges before integration.

Selection Notes

Select this component when a non-synchronous buck controller with a fixed 60kHz frequency is required. Verify that the external MOSFETs match the drive capabilities of the transistor driver output. Check that the application voltage does not exceed the 10V Vcc limit and that thermal management suits the SOT-753 package constraints.

Part Context

This part belongs to the S-8521 series of DC-DC switching controllers from ABLIC Inc. The series offers various output voltage options determined by external resistors. The S-8521 family is designed for compact power management solutions in consumer and industrial electronics.

Replacement Considerations

Consult ABLIC datasheets for direct pin-compatible alternatives within the S-8521 series. Verify functional equivalence regarding switching frequency and control logic before substituting.