78253/55MC-R

Overview

The Murata Power Solutions 78253/55MC-R is a surface-mount power transformer designed for MAX253 compatible converter applications. It features a single primary and single secondary winding configuration with a 1:1.5 turns ratio. The component supports a primary voltage of 3.3 V and delivers a secondary output of 5 V at up to 200 mA, providing a 500 mW power rating. Key electrical parameters include an inductance of 830 µH and a DC resistance of 1.5 Ohms. The unit measures 9.52 mm in length, 9 mm in width, and 6.35 mm in height, utilizing gull-wing leads for SMD/SMT installation.

Feature Summary

• Compatible with MAX253 controller architectures
• Surface-mount construction with gull-wing termination
• Single primary and single secondary winding topology

Applications

• MAX253 compatible switching power supply converters
• Isolated DC-DC conversion modules
• Board-mounted power management circuits

Procurement Notes

Verify the specific suffix 'R' indicates reel packaging when sourcing. Confirm that the component aligns with MAX253 design requirements. Check for the Not Recommended for New Design (NRND) status if applicable to current projects. Ensure the gull-wing package matches the target PCB footprint. Validate RoHS compliance against current manufacturing standards.

Selection Notes

Select this component for designs requiring MAX253 compatibility with surface-mount constraints. The 1:1.5 turns ratio suits 3.3V input to 5V output conversions. Verify that the 830 µH inductance meets the circuit's ripple and regulation needs. Ensure the board space accommodates the 9.52 x 9 x 6.35 mm dimensions. Consider thermal performance within the specified operating temperature range.

Part Context

This part belongs to the 78253 series of power transformers from Murata Power Solutions. The series includes variants like the 78253/55JC and 78253/55C, differing in mounting style and inductance values. The 78253 series is specifically engineered for isolated converter topologies, offering reliable magnetic coupling for standard switching frequencies.

Replacement Considerations

Murata suggests the 78253/55JC as an alternative. Verify pinout and inductance compatibility before substitution.