MIC38HC43YM

DC DC Switching Controllers Overview

The MIC38HC43YM is a monolithic high-speed switching mode power supply (SMPS) controller manufactured by Microchip Technology. It operates as a current-mode PWM controller with a fixed switching frequency of 500 kHz and supports Boost, Buck, Flyback, and Forward topologies. The device features a maximum duty cycle of 96% and provides an output drive capability of 1 A at 5 V. It functions within a supply voltage range up to 20 V with a quiescent current of 4 mA. The component is housed in an 8-pin SOIC package and is rated for operation between -40°C and +85°C.

DC DC Switching Controllers Feature Summary

• Supports multiple converter topologies including Boost, Buck, Flyback, and Forward configurations
• Utilizes current-mode control architecture for stable regulation
• Features high-speed switching capabilities with defined rise and fall times

DC DC Switching Controllers Applications

• High-speed switch mode power supply designs
• Industrial power conversion systems
• Telecommunications equipment power supplies

DC DC Switching Controllers Procurement Notes

Verify the specific ordering suffix to ensure the correct packaging configuration, as the YM variant typically indicates tube packaging. Confirm that the application environment remains within the specified operating temperature range of -40°C to +85°C. Ensure input voltage constraints do not exceed the maximum operating supply voltage of 20 V. Check for moisture sensitivity requirements during storage and handling procedures.

DC DC Switching Controllers Selection Notes

Select this component when a fixed 500 kHz frequency and 1 A drive current are required for current-mode PWM applications. Consider the SOIC-8 package size for space-constrained layouts. Evaluate the need for multiple topology support versus dedicated single-topology controllers. Assess thermal management needs given the 85°C maximum junction temperature limit.

DC DC Switching Controllers Part Context

The MIC38HC43YM belongs to the MIC38HC4x series of BiCMOS current-mode PWM controllers. This family is designed for high-performance power management applications requiring fast transient response and precise duty cycle control. The series integrates essential protection features and driver stages suitable for driving external power switches in various industrial and commercial power supply architectures.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.