LTC3805IMSE-5#TRPBF

DC DC Switching Controllers Overview

The LTC3805IMSE-5#TRPBF 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 70 kHz to 700 kHz. The device supports output voltages from 800 mV to 75 V and provides up to 2 A output current. It features ±1.5% output voltage accuracy, 360 μA quiescent current, and 40 μA micropower startup current. Operating temperatures range from -40°C to +85°C in a 10-lead MSOP package.

DC DC Switching Controllers Feature Summary

• Supports flyback, boost, and SEPIC topologies with programmable frequency and slope compensation
• Provides programmable overcurrent sensing for overload and short-circuit protection
• Features automatic restart capability via external soft-start capacitor
• Enables high-voltage powering through internal shunt regulator or direct low-impedance supply

DC DC Switching Controllers Applications

• Non-isolated SEPIC converters requiring wide input voltage ranges
• Flyback power supplies with isolated outputs
• Boost converter designs for voltage step-up applications

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing. Confirm the IMSE grade matches required temperature specifications. Check manufacturer documentation for any product change notifications affecting pinout or electrical characteristics. Ensure compatibility with external component selections for frequency programming.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring flexible topology support including flyback, boost, and SEPIC configurations. Consider the adjustable frequency range for optimizing transformer size and efficiency. Evaluate the quiescent current requirements against system standby needs. Verify that the 10-lead MSOP package fits the available PCB space constraints.

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 supporting different packaging options and temperature grades. These controllers are designed to drive external N-channel MOSFETs for efficient power conversion across various industrial and commercial power supply architectures.

DC DC Switching Controllers Replacement Considerations

LTC3805EMSE-5#PBF offers similar functionality but in tube packaging rather than tape-and-reel.