LTC3805IDD-5#PBF

DC DC Switching Controllers Overview

The LTC3805IDD-5#PBF is a single-output flyback and step-up DC/DC controller designed for industrial applications. It operates within an input voltage range of 8.8V to 75V and supports adjustable switching frequencies from 70kHz to 700kHz. The device provides an output voltage range of 0.8V to 75V with a typical quiescent current of 0.36mA. It features programmable overcurrent sensing, soft-start capabilities, and clock synchronization. The component is housed in a 10-pin DFN EP package and functions reliably across a temperature range of -40°C to 125°C.

DC DC Switching Controllers Feature Summary

• Supports flyback, boost, and SEPIC converter topologies for versatile power conversion designs.
• Includes programmable overcurrent sensing to protect against overload and short-circuit conditions.
• Features clock synchronization capability to reduce electromagnetic interference through frequency spreading.

DC DC Switching Controllers Applications

• Industrial distributed power systems
• Isolated DC/DC converter designs
• High-voltage step-up power supplies

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'IDD-5' against official Analog Devices documentation to confirm automotive-grade qualification and pinout compatibility. Ensure the selected package variant matches the required thermal dissipation and footprint specifications for the target PCB layout before finalizing procurement orders.

DC DC Switching Controllers Selection Notes

Select this controller when designing isolated or non-isolated converters requiring high input voltages up to 75V. The adjustable frequency range allows optimization for transformer size versus efficiency. Verify that external MOSFETs and passive components support the maximum operating temperature of 125°C to ensure system reliability under harsh industrial conditions.

DC DC Switching Controllers Part Context

This component belongs to the LTC3805 family of current mode DC/DC controllers manufactured by Analog Devices. The family includes variants such as the EMSE and HMSE packages, offering flexibility in thermal management and form factor. The IDD-5 designation specifically indicates an industrial temperature grade with enhanced reliability standards suitable for demanding environments.

DC DC Switching Controllers Replacement Considerations

Direct replacements include other members of the LTC3805 family, such as the LTC3805IMSE-5#PBF or LTC3805HMSE#PBF, provided package and thermal requirements are met. Cross-referencing datasheets is essential to verify identical control logic and pin configurations.