S-8521D40MC-BXZT2G

Overview

The S-8521D40MC-BXZT2G is a step-down DC-DC switching controller manufactured by ABLIC Inc. It operates with a fixed switching frequency of 60kHz and supports a maximum duty cycle of 100%. The device accepts an input supply voltage range of 2.5V to 16V and provides a single positive output configuration. Designed for surface-mount installation, it utilizes the SC-74A or SOT-753 package (SOT-23-5). The component functions as a non-synchronous buck regulator with transistor driver outputs and includes enable control features. It is rated for operation within a temperature range of -40°C to +85°C.

Feature Summary

• Supports 100% maximum duty cycle for low dropout operation
• Fixed 60kHz switching frequency for stable regulation
• Wide input voltage range from 2.5V to 16V
• Integrated enable pin for power management control

Applications

• Battery-powered portable electronic devices
• General-purpose step-down voltage regulation in consumer electronics
• Embedded systems requiring efficient DC-DC conversion

Procurement Notes

Verify the specific suffix 'BXZT2G' against official ABLIC documentation to confirm availability status and marking codes. Ensure compatibility with the required SOT-23-5 footprint and thermal requirements. Confirm RoHS compliance and REACH status through current manufacturer declarations before integration into production designs.

Selection Notes

Select this model when a fixed 60kHz frequency is preferred over variable options. The 16V maximum input rating distinguishes it from lower-voltage variants like the S-8521C series. Verify that the external component selection aligns with the 60kHz switching speed for optimal efficiency and stability.

Part Context

This component belongs to the S-8521 series of buck regulators from ABLIC Inc., designed for compact power management solutions. It shares architectural similarities with the S-8520 series but offers distinct input voltage ranges and switching frequencies depending on the specific model variant.

Replacement Considerations

The S-8521C27MC-BXMT2U is a related part within the same family but differs in input voltage specifications. Cross-reference datasheets to ensure the replacement meets the 16V input requirement and 60kHz frequency constraints.