78253/35JC

Overview

The Murata Power Solutions Inc. 78253/35JC is a surface-mount power transformer designed for the MAX253 converter chipset. It features a primary voltage rating of 3.3 V and a secondary voltage rating of 5 V, with a power rating of 500 mW. The component has a single primary winding and a single secondary winding, providing an isolation ratio of 1:2.27. Its 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 the MAX253 switching regulator chipset to provide isolated power conversion.
• Supports standard surface-mount technology (SMD) installation for automated PCB assembly processes.
• Provides galvanic isolation between the primary and secondary circuits within a compact footprint.

Applications

• Isolated DC-DC power supply modules utilizing the MAX253 controller.
• Telecommunications equipment requiring 3.3V to 5V isolated conversion.
• Industrial control systems needing compact isolated power stages.
• Consumer electronics devices with space-constrained power architectures.

Procurement Notes

Verify the specific suffix designation when ordering, as variants such as 78253/35JC-R exist with identical electrical characteristics but different packaging formats. Confirm that the selected variant matches the required reel or tube configuration for your manufacturing line. Ensure compatibility with the MAX253 chipset before finalizing procurement specifications.

Selection Notes

Select this component when designing a system around the MAX253 controller that requires a 3.3V input and 5V output. Consider the 500 mW power limit and the 1:2.27 turns ratio to ensure it meets the load requirements. Evaluate the SMD package size against available board space constraints during the initial layout phase.

Part Context

This transformer belongs to the Murata 78253 series, which consists of converters transformers optimized for the Maxim Integrated MAX253 family. These components are engineered to minimize external component count and simplify the design of isolated power supplies. The series supports various winding configurations to accommodate different input and output voltage combinations.

Replacement Considerations

The 78253/35JC-R is a direct functional substitute with identical electrical parameters, differing only in packaging format. Other models in the 78253 series may serve as alternatives if the voltage ratio or power rating differs from the current design requirements.