LTC3805MPMSE#PBF

DC DC Switching Controllers Overview

The LTC3805MPMSE#PBF is a high-performance adjustable frequency current mode DC/DC controller designed for flyback, boost, and SEPIC converter applications. It drives an N-channel MOSFET with programmable switching frequencies ranging from 70 kHz to 700 kHz. The device features a wide operating supply voltage range of 4.7V to 8.8V or up to 75V via an internal shunt regulator. It delivers ±1.5% output voltage accuracy and includes programmable soft-start with automatic restart capabilities. Quiescent current consumption is 360μA during normal operation and reduces to 40μA in micropower startup mode. The component is housed in a 10-lead MSOP package.

DC DC Switching Controllers Feature Summary

• Supports flyback, boost, and SEPIC topologies with external resistor programming for frequency and slope compensation.
• Integrates programmable overcurrent sensing to protect against overload and short-circuit conditions.
• Features a built-in 9.5V internal shunt regulator allowing high-voltage input powering through a resistor.

DC DC Switching Controllers Applications

• Industrial power supplies requiring isolated outputs
• Battery-powered equipment needing low quiescent current
• Telecommunications infrastructure power management

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'MP' indicates military-grade temperature rating and reliability standards compared to standard commercial variants. Confirm RoHS compliance status and lead-free soldering requirements with the manufacturer prior to ordering. Check for obsolescence notices or lifecycle changes that may affect long-term availability. Ensure the selected package matches the PCB footprint design specifications exactly.

DC DC Switching Controllers Selection Notes

Select this controller when designing flyback, boost, or SEPIC converters requiring adjustable frequency operation. Consider the 360μA quiescent current for efficiency optimization in standby modes. Evaluate the need for the extended military temperature range associated with the MP suffix versus standard industrial grades. Ensure external components support the required voltage and current ratings for the target application topology.

DC DC Switching Controllers Part Context

The LTC3805 series serves as a versatile family of DC/DC controllers from Analog Devices. The MPMSE variant specifically denotes the military-grade version within the MSOP package lineup. This part complements other power management solutions by providing flexible control for non-isolated and isolated converter designs. It fits into broader system architectures requiring precise voltage regulation and protection features.

DC DC Switching Controllers Replacement Considerations

Direct substitutes include the LTC3805EMSE#PBF for commercial grade applications. Verify pin compatibility and electrical parameter equivalence before swapping. Review datasheet differences regarding temperature ranges and reliability specifications between commercial and military variants.