LTC3805HMSE#PBF

DC DC Switching Controllers Overview

The LTC3805HMSE#PBF is a current mode DC/DC controller designed for flyback, boost, and SEPIC converter applications. It operates within a switching frequency range of 70kHz to 700kHz and supports a maximum duty cycle of 80%. The device accepts an input supply voltage between 3.95V and 9.5V. It features clock synchronization capability and includes enable and soft-start control characteristics. The component is housed in a 10-MSOP-EP package with a bare pad, suitable for surface mount installation. It functions as a single-output transistor driver with positive or isolated output configurations.

DC DC Switching Controllers Feature Summary

• Supports flyback, boost, and SEPIC topologies with adjustable frequency and slope compensation via external resistors.
• Integrates programmable overcurrent sensing to protect against overload and short-circuit conditions.
• Features a micropower startup mode that reduces quiescent current consumption significantly during start-up phases.

DC DC Switching Controllers Applications

• Flyback converter designs requiring adjustable switching frequencies
• Boost converter applications with high input voltage ranges
• SEPIC converters for non-isolated power conversion

DC DC Switching Controllers Procurement Notes

Verify the specific suffix and tape/reel or tube packaging configuration against the manufacturer's latest documentation before ordering. Confirm that the operating temperature grade meets the -40°C to 150°C junction temperature requirement for the intended application environment. Ensure the 10-MSOP-EP footprint matches the PCB design guidelines provided in the official datasheet to guarantee proper thermal dissipation and electrical connection.

DC DC Switching Controllers Selection Notes

Select this controller when designing flyback, boost, or SEPIC converters that require precise current mode control. It is suitable for applications needing clock synchronization to reduce EMI or allow multiple converters to operate in phase. Consider the 3.95V to 9.5V Vcc range for power supply design. Verify that the external components can support the 70kHz to 700kHz frequency range and that the package thermal performance is adequate for the expected power levels.

DC DC Switching Controllers Part Context

The LTC3805 series consists of current mode DC/DC controllers from Analog Devices Inc. The HMSE variant specifically denotes the industrial temperature grade and the 10-lead MSOP package with an exposed pad. This family is engineered for driving N-channel MOSFETs in various non-synchronous converter topologies, offering flexibility through programmable parameters for frequency and protection thresholds.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's official replacement guide or contact technical support directly for qualified alternatives. Do not assume pin-to-pin compatibility with other models without verifying the specific datasheet specifications and electrical characteristics.