78253/55VC

Overview

The Murata Power Solutions 78253/55VC is a specialty power transformer designed for the MAX253 controller. It features a single primary and single secondary winding configuration with a turns ratio of 1:1. The component has a primary voltage rating of 3.3 V and a secondary voltage rating of 5 V, supporting a maximum secondary current of 200 mA and a power rating of 500 mW. It offers an inductance of 240 µH and operates within a temperature range of -40°C to +85°C. The physical dimensions are 9.52 mm in length, 9 mm in width, and 6.35 mm in height.

Feature Summary

• Designed specifically for use with MAX253 switching regulators
• Encapsulated construction for environmental protection
• Single primary and single secondary winding topology

Applications

• MAX253-based DC-DC converter circuits
• Inverter applications requiring isolated power stages
• Power supply designs utilizing the MAX253 controller

Procurement Notes

Verify the package type carefully as sources conflict; some list it as Through-Hole (TH) while others indicate Surface-Mount (SMD). Confirm the specific suffix or datasheet version matches your PCB footprint requirements. Check for recommended alternates like the 78253/55JC if availability is limited. Ensure RoHS compliance status aligns with project specifications before ordering.

Selection Notes

Select this component when designing around the MAX253 controller with specific voltage conversion needs from 3.3V to 5V. Consider the 240 µH inductance value for your ripple current requirements. Evaluate the thermal performance within the -40°C to +85°C operating range. Compare against other variants in the 78253 series for different mounting styles or inductance values if space constraints differ.

Part Context

This part belongs to the 78253 series of specialty transformers manufactured by Murata Power Solutions. These components are engineered to work in conjunction with Maxim Integrated (now Analog Devices) MAX253 controllers. The series includes various inductance values and mounting options tailored for efficient power conversion in compact electronic systems.

Replacement Considerations

Murata suggests the 78253/55JC as an alternate part number. Verify electrical compatibility and mechanical fit before substitution. Other series members may offer different inductance values but require circuit re-evaluation.