S-8521D27MC-BXMT2U

Overview

The S-8521D27MC-BXMT2U is a step-down switching controller IC from the ABLIC S-8521 series, designed for DC-DC conversion applications. It operates with an input voltage range of 2.5V to 16V and features a fixed switching frequency of 60kHz. The device utilizes a transistor driver output configuration and supports a maximum duty cycle of 100%. It is housed in a compact SOT-23-5 package and is rated for operation within a temperature range of -40°C to +85°C.

Feature Summary

• Supports high duty cycle operation up to 100% for efficient voltage regulation
• Integrates enable control functionality for power management flexibility
• Designed for positive output buck topology applications

Applications

• Battery-powered portable electronic devices requiring step-down conversion
• General-purpose DC-DC power supply circuits
• Embedded systems utilizing low-voltage logic supplies

Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm RoHS compliance status and check for recent design changes or marking updates documented in public PCN notices. Ensure the specific suffix matches required packaging options such as cut tape or reel formats before finalizing procurement orders.

Selection Notes

Select this controller when a fixed 60kHz switching frequency is suitable for the application's EMI constraints. The wide input voltage range accommodates various battery chemistries. Verify that external components support the required current levels, as this IC functions primarily as a controller rather than a fully integrated regulator with internal power switches.

Part Context

This component belongs to the S-8521 series of switching controllers from ABLIC Inc. It is categorized under PMIC - Power Management ICs, specifically within the DC-DC Switching Controllers subcategory. The part shares family characteristics with other S-8521 variants but differs in specific pinout configurations and output drive capabilities defined by its unique model designation.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Engineers should consult the official datasheet for direct pin-compatible alternatives or evaluate functional equivalents based on electrical specifications.