LTC3646IDE-1#PBF

Voltage Regulators - DC DC Switching Regulators Overview

The LTC3646IDE-1#PBF is a high-efficiency synchronous step-down DC/DC converter manufactured by Analog Devices Inc. It features an input voltage range of 4V to 40V and delivers up to 1A of output current. The device utilizes internal high-side and synchronous power FETs with a fixed 28V output configuration in the referenced application circuit. It operates at a switching frequency of 500kHz and achieves efficiencies up to 95%. In Burst Mode operation, it draws only 140µA typical DC supply current at no load while maintaining regulation.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates internal high-side and synchronous power FETs for compact design
• Supports external synchronization to an external clock signal
• Maintains output voltage regulation during light-load conditions via Burst Mode
• Features programmable switching frequency or synchronization capability

Voltage Regulators - DC DC Switching Regulators Applications

• High-voltage point-of-load conversion systems
• Battery-powered equipment requiring low quiescent current
• Industrial control applications with wide input voltage ranges
• Telecommunications infrastructure power distribution

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix and package designation against official Analog Devices documentation to confirm pinout and thermal characteristics. Ensure the ordering part number matches the required temperature grade and packaging format. Cross-reference the datasheet revision history for any manufacturing changes that may affect compatibility with existing designs.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a wide input voltage range up to 40V is required alongside high efficiency at moderate loads. The integrated synchronous rectification reduces external component count compared to non-synchronous alternatives. Consider the thermal performance of the DFN-14 package for PCB layout optimization in space-constrained applications.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LTC3646 family of synchronous buck converters designed for high-voltage inputs. The IDE-1 variant specifically denotes a particular package and temperature rating combination within the broader product line. It shares core architectural features with other members like the IMSE-1 and EMSE-1, differing primarily in physical footprint and operating temperature specifications.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other parts within the LTC3646 series such as LTC3646IMSE-1#PBF or LTC3646EDE-1#PBF, provided the package and temperature ratings align with the system requirements. Verify pin compatibility and thermal dissipation capabilities before substitution.