111-3053PBF

Overview

The Infineon Technologies 111-3053PBF is a positive output step-down DC-DC switching controller IC designed for buck converter topologies. It operates within a junction temperature range of -40°C to 125°C and features clock synchronization capabilities. The device provides a single transistor driver output and is housed in a 14-SOIC surface-mount package with a width of 3.90mm. This component functions as a dedicated regulator controller for efficient power conversion applications.

Feature Summary

• Supports synchronous buck converter topology for high-efficiency step-down voltage regulation
• Includes integrated clock synchronization functionality to reduce electromagnetic interference
• Features robust thermal performance suitable for demanding industrial environments

Applications

• Industrial power supply systems requiring isolated or non-isolated step-down conversion
• Telecommunications infrastructure equipment utilizing standard logic levels
• Embedded systems needing stable voltage regulation from higher input rails

Procurement Notes

Verify component authenticity through authorized distributors, as the part is marked obsolete by the manufacturer. Confirm RoHS compliance status and lead-free specifications during sourcing. Request original datasheets to validate pinout compatibility and electrical characteristics against current design requirements before procurement.

Selection Notes

Select this controller when designing buck converters requiring synchronized operation to minimize noise in multi-phase systems. Ensure the chosen inductor and capacitor values align with the internal drive characteristics of the 14-SOIC package. Consider thermal management strategies given the wide operating temperature range and surface-mount form factor.

Part Context

This component belongs to the family of DC-DC switching controllers manufactured by Infineon Technologies, formerly associated with International Rectifier. It serves as a specialized integrated circuit for managing power stage dynamics in step-down configurations, distinct from complete switching regulators that include internal switches.

Replacement Considerations

The product is officially listed as obsolete and no longer manufactured. Engineers should consult official alternative package types or compatible successor series provided by Infineon Technologies for direct replacement in existing designs.