S-8521D29MC-BXOT2G

Overview

The S-8521D29MC-BXOT2G is a step-down DC/DC switching controller manufactured by ABLIC Inc. It operates with a fixed switching frequency of 60 kHz and supports a maximum duty cycle of 100%. The device accepts an input supply voltage ranging from 2.5 V to 16 V and provides a single positive output configuration. Designed for surface-mount installation, it utilizes the SOT-23-5 package (SC-74A/SOT-753). The component functions as a transistor driver with enable control characteristics and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Supports 100% maximum duty cycle operation
• Integrated enable control functionality
• Fixed 60 kHz switching frequency

Applications

• General-purpose step-down power regulation
• Battery-powered electronic devices
• Portable consumer electronics

Procurement Notes

Verify the specific suffix BXOT2G against official ABLIC documentation to confirm packaging and marking details. Confirm current availability status as components may be subject to obsolescence or lifecycle changes. Ensure compatibility with existing PCB footprints and thermal management requirements before finalizing procurement decisions.

Selection Notes

Select this controller when a compact solution with a wide input voltage range up to 16 V is required. The fixed 60 kHz frequency allows for smaller external inductor and capacitor selection compared to lower-frequency alternatives. Verify that the load requirements align with the controller's drive capabilities and that the operating environment remains within the specified -40°C to +85°C temperature limits.

Part Context

This component belongs to the S-8521 series of buck switching controllers from ABLIC Inc. The series is characterized by its ability to operate with high efficiency at low frequencies, facilitating the use of small passive components. The S-8521D variant specifically denotes the input voltage range and output configuration distinct from other series members.

Replacement Considerations

Consult official substitution lists for direct equivalents. Cross-reference pinouts and electrical specifications carefully if considering alternative manufacturers.