MIC4043BM4

Overview

The MIC4043BM4 is a low-voltage secondary-side shunt regulator manufactured by Microchip Technology, formerly Micrel. It is designed for precision voltage reference applications in power management circuits. The device operates within a supply voltage range of 1.8 V to 10 V and delivers a nominal output voltage of 1.245 V, with a typical tolerance between 1.2201 V and 1.2699 V. It functions effectively across an industrial temperature range from -40 °C to +85 °C. The component is housed in a TSSOP-4 package, featuring a plastic epoxy body with a maximum height of 1.12 mm and a length of 2.86 mm, suitable for surface-mount assembly.

Feature Summary

• Provides a stable low-voltage reference output for secondary-side regulation
• Operates efficiently at low supply voltages down to 1.8 V
• Designed for space-constrained surface-mount applications

Applications

• Low-voltage secondary-side shunt regulation in power supplies
• Precision voltage reference sources for analog circuits
• Battery-powered systems requiring stable low-voltage references

Procurement Notes

Verify the manufacturer designation carefully, as the part was originally developed under Micrel Inc. before its acquisition by Microchip Technology. Ensure the ordering suffix matches the required package type and temperature grade. Confirm that the specific batch meets RoHS compliance standards if required by your manufacturing process. Cross-reference the datasheet revision to ensure compatibility with current design specifications.

Selection Notes

Select this component when a precise 1.245 V reference is needed for low-voltage secondary-side regulation. Consider the TSSOP-4 package for compact board layouts. Evaluate the operating voltage range against your system's minimum supply requirements. Verify thermal performance within the specified -40 °C to +85 °C range for your application environment.

Part Context

This component belongs to the family of low-voltage shunt regulators designed for precision reference applications. It serves as a critical element in power management architectures where accurate voltage monitoring or regulation is required on the secondary side of isolated converters. The device complements other voltage reference solutions by offering a specialized low-voltage option in a small outline package.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult official Microchip resources for potential cross-references or updated product line replacements.