S-8521D16MC-BXBT2U

Overview

The S-8521D16MC-BXBT2U is a step-down DC-DC switching controller manufactured by ABLIC Inc. It operates as a buck regulator with a positive output, housed in an SOT-23-5 package. The device functions at a switching frequency of 300 kHz and features a low quiescent current of 100 uA. As a dedicated switching controller, it requires external power switches to regulate voltage efficiently.

Feature Summary

• Step-down topology for efficient voltage regulation
• Integrated PWM control circuitry
• Low quiescent current operation

Applications

• Battery-powered portable electronics
• Embedded systems requiring stable voltage rails
• General-purpose DC-DC conversion modules

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix BXBT2U matches project requirements. Check for end-of-life status or obsolescence notices from ABLIC before finalizing procurement plans to ensure long-term supply stability.

Selection Notes

Select this controller when a compact SOT-23-5 footprint is required for space-constrained designs. Ensure external MOSFETs are compatible with the internal driver capabilities. Verify that the input voltage range supports the target application's power source without exceeding maximum ratings.

Part Context

This component belongs to the S-8521 series of switching controllers from ABLIC. It is part of the broader PMIC category focused on power management solutions. The series typically offers various fixed output voltages and packaging options to suit different embedded power needs.

Replacement Considerations

Consult official cross-reference lists for verified substitutes. Ensure replacement parts match the SOT-23-5 pinout and electrical characteristics. Generic equivalents may require circuit redesign if control interfaces differ.