User Manual
This document describes the features and characteristics of the LTC3809 3809fb product, including no current sense resistor required, selectable spread spectrum frequency modulation, constant frequency current mode operation, etc.
User Manual
The LTC3809 is a synchronous step-down switching regulator controller that drives external complementary power MOSFETs using few external components. It features selectable spread spectrum frequency modulation for low noise operation, constant frequency current mode operation for excellent line and load transient response, and true PLL for frequency locking or adjustment. It has a wide input voltage range and output voltage range, and is suitable for one or two lithium-ion powered devices, portable instruments, and distributed DC power systems.
