78253/55MC

Overview

The Murata Power Solutions 78253/55MC is a surface-mount power transformer designed for compatibility with the MAX253 controller. It features a single primary and single secondary winding configuration, providing electrical isolation between circuits. The component has a primary voltage rating of 3.3 V and a secondary voltage rating of 5 V. It supports a power rating of 500 mW with a secondary current rating of 200 mA. The physical dimensions are 9.52 mm in length, 9 mm in width, and 6.35 mm in height.

Feature Summary

• Designed specifically for compatibility with MAX253 switching controllers
• Provides galvanic isolation via single primary and single secondary windings
• Optimized for surface-mount technology (SMD/SMT) assembly processes

Applications

• Compatible converter transformer applications using MAX253 controllers
• Isolated DC-DC conversion stages in compact electronic devices
• Power supply modules requiring small form factor isolation transformers

Procurement Notes

Verify that the specific suffix 'MC' corresponds to the required mounting style and package variant, as other suffixes may indicate different configurations. Confirm that the component status aligns with design requirements, noting that some variants in this series may carry end-of-life or not-recommended-for-new-designations. Ensure the selected part matches the intended PCB footprint and thermal management needs for the target application.

Selection Notes

Select this transformer when utilizing a MAX253 controller and requiring a compact SMD solution with 3.3V primary and 5V secondary ratings. Consider the 500 mW power limit and 200 mA secondary current capability against load requirements. Evaluate the 9.52 x 9 x 6.35 mm envelope for space constraints. Verify RoHS compliance and operating temperature range suitability for the specific environmental conditions of the final product.

Part Context

This component belongs to the 78253 series of dedicated transformers manufactured by Murata Power Solutions. These parts are engineered to work in conjunction with specific integrated circuit controllers, primarily the MAX253 family. The series offers various inductance and packaging options to support different isolated power supply designs within a standardized footprint and performance profile.

Replacement Considerations

Murata suggests the 78253/55JC as an alternate option. Verify if the alternative part number meets all electrical and mechanical specifications before substitution.