Infineon 111-3053PBF: Single-Phase Synchronous Buck Controller Notes

ChipApexOctober 22, 2026

Infineon 111-3053PBF: Single-Phase Synchronous Buck Controller Notes

The Infineon 111-3053PBF is a step-down (buck) DC-DC switching controller in a 14-SOIC package. It drives an external synchronous MOSFET pair from a 4.5 V to 13.2 V bias rail, with a programmable switching frequency roughly between 100 kHz and 400 kHz and a maximum duty cycle near 80%. Control features listed for the device include current limit, enable and soft start, plus clock synchronization. Those blocks are useful when several POL rails must share a common clock to manage beat frequencies on a dense motherboard or telecom card. When qualifying samples, match the land pattern to the 14-SOIC footprint, check the MOSFET gate-drive current against your chosen FETs, and confirm the −40 °C to 125 °C junction range covers the enclosure. Obsolete or long-lead IR heritage parts should be cross-checked against Infineon’s current controller roadmap before volume release.

Product page: 111-3053PBF Infineon synchronous buck controller, 14-SOIC.

Detailed parameters and stock for the 111-3053PBF Infineon synchronous buck controller, 14-SOIC are listed on ChipApex, an independent electronic components distributor in Shenzhen. Catalog home: ChipApex.

Infineon 111-3053PBF: Single-Phase Synchronous Buck Controller Notes

Infineon 111-3053PBF: Single-Phase Synchronous Buck Controller Notes

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