LTC3809EMSE#PBF

DC DC Switching Controllers Overview

The LTC3809EMSE#PBF is a synchronous step-down DC/DC controller manufactured by Analog Devices Inc. It operates with an input voltage range of 2.75V to 9.8V and features a fixed switching frequency of 550kHz. The device supports up to 100% duty cycle and includes integrated control features such as enable, soft-start, and output tracking. It is housed in a 10-MSOP package with an exposed pad and is rated for operation between -40°C and 85°C.

DC DC Switching Controllers Feature Summary

• Synchronous buck topology with integrated control logic
• Output voltage tracking capability for system sequencing
• Built-in soft-start function to limit inrush current

DC DC Switching Controllers Applications

• Point-of-load regulation for embedded systems
• Industrial equipment power distribution
• Telecommunications infrastructure power supplies

DC DC Switching Controllers Procurement Notes

Verify the specific suffix against official documentation to confirm package type and temperature rating. Ensure compatibility with external MOSFETs regarding gate drive requirements. Confirm RoHS compliance status through the manufacturer's latest material declaration before finalizing procurement specifications.

DC DC Switching Controllers Selection Notes

Select this component when designing non-isolated step-down converters requiring precise output tracking relative to another rail. The fixed 550kHz frequency allows for optimized passive component sizing. Verify that the required output voltage falls within the supported adjustable range for the target application.

DC DC Switching Controllers Part Context

This part belongs to the LTC3809 family of high-efficiency synchronous buck controllers. It is designed for applications requiring low component count and compact solution size. The EMSE#PBF designation indicates a tube-packaged version suitable for automated surface-mount assembly processes.

DC DC Switching Controllers Replacement Considerations

Consult official substitution guides for verified alternatives. Cross-reference pinouts and thermal characteristics carefully when evaluating potential replacements from other manufacturers.