LTC3809IMSE-1#PBF

DC DC Switching Controllers Overview

The LTC3809IMSE-1#PBF is a synchronous step-down switching regulator DC/DC controller manufactured by Analog Devices Inc. It operates with an input voltage range of 2.75 V to 9.8 V and provides a single positive output adjustable from 600 mV to 9.8 V. The device supports up to 5 A output current with a fixed switching frequency of 550 kHz. Key electrical specifications include a maximum duty cycle of 100%, a typical static current of 105 uA, and a working supply current of 350 uA. Load regulation is specified at 0.1%. The component is housed in a 10-MSOP package and functions within a temperature range of -40°C to +85°C.

DC DC Switching Controllers Feature Summary

• Synchronous rectification architecture eliminates the need for external Schottky diodes to improve efficiency.
• Integrated soft-start and tracking capabilities allow for controlled power-up sequences and multi-rail synchronization.
• Zero-sense resistor design simplifies board layout and reduces cost by removing high-current sense components.

DC DC Switching Controllers Applications

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

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #PBF indicates tube packaging when sourcing. Confirm the IMSE variant corresponds to the MSOP-10 package rather than DFN options. Ensure compatibility with the intended thermal management strategy for surface-mount installation. Cross-reference the manufacturer part number against official Analog Devices databases to confirm current production status and availability constraints.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring low input voltage operation down to 2.75 V. The 550 kHz frequency offers a balance between component size and efficiency. Consider the 105 uA quiescent current for standby power requirements. The MSOP-10 package suits designs with moderate space constraints compared to larger QFN footprints.

DC DC Switching Controllers Part Context

This component belongs to the LTC3809-1 family of synchronous buck controllers. It shares core functionality with variants like the LTC3809IDD-1#TRPBF but differs in package type and shipping format. The family is designed for low-voltage, high-efficiency power conversion in compact electronic devices.

DC DC Switching Controllers Replacement Considerations

LTC3809EDD-1#TR is a compatible alternative offering identical electrical performance in a DFN-10 package. Verify pinout compatibility and thermal pad requirements before substitution.