MIC4043YM4-TR

Overview

The MIC4043YM4-TR is a low-voltage secondary-side shunt regulator manufactured by Microchip Technology. It operates within a supply voltage range of 1.8 V to 10 V and provides a nominal output voltage of 1.245 V, with a maximum of 1.2699 V and a minimum of 1.2201 V. The device is housed in a TSSOP package (R-PDSO-G4) with four terminals and measures 2.86 mm in length and 1.12 mm in maximum height. It functions as a three-terminal voltage reference suitable for applications requiring precise low-voltage regulation.

Feature Summary

• Provides stable low-voltage regulation for secondary-side circuitry
• Operates efficiently at supply voltages as low as 1.8 V
• Designed for compact surface-mount integration

Applications

• Secondary-side shunt regulation in power supplies
• Low-voltage reference circuits
• Battery-powered equipment requiring precise voltage control

Procurement Notes

Verify the specific suffix TR indicates tape-and-reel packaging when ordering. Confirm the TSSOP-4 package dimensions and thermal characteristics match your PCB layout requirements. Ensure the operating temperature range of -40 °C to 85 °C aligns with your system's environmental conditions. Cross-reference the datasheet for exact electrical tolerances before finalizing component selection.

Selection Notes

Select this component when a fixed low-voltage reference near 1.25 V is required in a small form factor. The TSSOP package offers a balance between pin count and board space efficiency. Consider the 1.8 V minimum supply constraint to ensure adequate headroom for your application's input voltage profile compared to higher-voltage alternatives.

Part Context

This part belongs to Microchip's family of low-voltage shunt regulators, designed specifically for secondary-side control. It serves as a precision voltage reference alternative to traditional Zener diodes, offering better stability and lower noise characteristics in compact electronic designs requiring tight voltage regulation.

Replacement Considerations

Check for direct replacements within the LM4040 or LM4041 series if different voltage outputs are needed. Verify pinout compatibility with existing PCB footprints before substituting with other shunt regulators from Microchip or third-party manufacturers.