LTC3805HMSE-5#PBF

DC DC Switching Controllers Overview

The LTC3805HMSE-5#PBF is an adjustable frequency current mode DC/DC controller designed for flyback, boost, and SEPIC converter applications. It drives N-channel MOSFETs with a switching frequency range of 70kHz to 700kHz. The device features programmable overcurrent sensing, external soft-start, and automatic restart capabilities. It operates from a supply voltage of 4.7V to 8.8V or via a high-voltage shunt regulator up to 75V. Quiescent current is 360μA during normal operation and 40μA in micropower startup. Output voltage accuracy is ±1.5%. It is housed in a 10-lead MSOP package with exposed pad.

DC DC Switching Controllers Feature Summary

• Supports flyback, boost, and SEPIC topologies for versatile power conversion designs
• Integrates programmable overcurrent sensing for overload and short-circuit protection
• Features micropower startup mode to minimize quiescent current consumption
• Includes external soft-start and automatic restart functionality

DC DC Switching Controllers Applications

• Flyback converter designs requiring isolated outputs
• Boost converter applications for step-up voltage regulation
• SEPIC converter implementations for non-isolated wide input range conversion

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'HMSE-5' against official Analog Devices documentation to confirm pinout and electrical characteristics match your design requirements. Ensure the component meets RoHS compliance standards as indicated by the '#PBF' designation. Cross-reference the datasheet revision history for any recent manufacturing changes that may affect performance or compatibility.

DC DC Switching Controllers Selection Notes

Select this controller when designing flyback, boost, or SEPIC converters requiring adjustable frequency operation between 70kHz and 700kHz. It is suitable for applications needing precise output voltage accuracy and low quiescent current. Consider the 10-MSOP package constraints and thermal management requirements for the exposed pad. Verify input voltage ranges align with the internal shunt regulator or direct supply options.

DC DC Switching Controllers Part Context

The LTC3805 series comprises current mode DC/DC controllers optimized for driving external N-channel MOSFETs. The HMSE-5 variant specifically denotes the MSOP package and temperature grade within the broader family. This component belongs to Analog Devices' portfolio of power management integrated circuits focused on efficient energy conversion solutions.

DC DC Switching Controllers Replacement Considerations

Consult official Analog Devices substitution guides for verified alternatives. Generic replacements may not support the same combination of flyback, boost, and SEPIC topologies or the specific frequency programming range.