S-8521E42MC-BMBT2U

Overview

The S-8521E42MC-BMBT2U is a step-down DC-DC switching controller manufactured by ABLIC Inc. It operates with a fixed output voltage of 4.2V and supports an input voltage range from 3.1V to 10V. The device features a maximum output current capability of 300mA and utilizes a PWM control method with a switching frequency of 250kHz. It is housed in a compact SOT-23-5 package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates a high-precision internal reference voltage source for stable regulation
• Employs pulse-width modulation (PWM) technique for efficient power conversion
• Designed for compact surface-mount integration in space-constrained layouts

Applications

• Portable electronic devices requiring step-down voltage regulation
• Battery-powered systems needing efficient power management
• Embedded circuits utilizing low-voltage logic components

Procurement Notes

Verify the specific suffix BMBT2U against official ABLIC documentation to confirm pinout and electrical characteristics. Confirm RoHS compliance status through the manufacturer's latest environmental declaration. Ensure the sourcing channel provides valid traceability for this discontinued or limited-stock component type.

Selection Notes

Select this component when a fixed 4.2V output is required from a 3.1V to 10V input source. The 300mA current rating suits moderate load applications. The SOT-23-5 package is appropriate for designs prioritizing minimal board area consumption over high-power dissipation capabilities.

Part Context

This part belongs to the S-8521 series of switching regulators from ABLIC. The series focuses on providing efficient DC-DC conversion solutions for portable electronics. The S-8521 family typically offers various fixed output voltages to accommodate different system requirements while maintaining small form factors.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided data. Verify compatibility with existing circuit designs before considering alternative components.