BD441STU

Overview

The BD441STU is a monolithic integrated circuit manufactured by onsemi, classified as a DC-DC step-down switching regulator. It operates with an input voltage range of 2.7V to 36V and delivers a regulated output voltage adjustable from 1.235V to 30V via external resistors. The device supports a maximum continuous output current of 1A and incorporates an internal power switch rated for 600mA. It functions at a fixed switching frequency of 100kHz and includes comprehensive protection features such as thermal shutdown and current limiting.

Feature Summary

• Integrates a high-voltage power switch capable of handling up to 600mA within a compact package
• Provides stable regulation through an adjustable feedback loop compatible with standard resistor networks
• Incorporates built-in thermal shutdown mechanisms to safeguard operation under overload conditions

Applications

• Battery-powered portable equipment requiring efficient voltage conversion
• Industrial control systems utilizing wide input voltage ranges
• Embedded applications needing isolated or non-isolated DC-DC step-down topology

Procurement Notes

Verify the specific suffix designation against official manufacturer documentation to confirm pinout compatibility and thermal characteristics. Ensure that the procurement channel provides traceability to original manufacturing sources. Cross-reference the component marking with datasheet specifications to validate authenticity before integration into production designs.

Selection Notes

Select this component when designing circuits requiring a simple, cost-effective solution for stepping down higher voltages to lower levels. It is suitable for applications where moderate efficiency and minimal external component count are prioritized over ultra-low quiescent current consumption. Evaluate thermal performance requirements based on the expected load current and ambient operating conditions.

Part Context

This part belongs to the family of monolithic switching regulators produced by onsemi. These devices are engineered to simplify power supply design by integrating the controller, oscillator, and power transistor into a single semiconductor die. They serve as fundamental building blocks in various electronic systems requiring reliable voltage regulation from diverse input sources.

Replacement Considerations

Consult official substitution guides for equivalent parts offering similar electrical characteristics. Verify that any alternative component matches the required input voltage range, output current capability, and package dimensions to ensure mechanical and functional compatibility without redesigning the surrounding circuitry.