LTC3789 is a high effi ciency 4-switch buck-boost controller that provides accurate output current limit
This document is Design Note 499 for the LTC3789, a constant frequency current mode buck-boost switching regulator controller. It explains how the device operates in current mode to simplify loop compensation and provides excellent transient response. The note highlights that the internal oscillator can be programmed via resistor, voltage, or external clock within a 200kHz to 600kHz range.
The controller accepts an input voltage ranging from 4V to 38V.
The design example provides a fixed 12V output at 5A.
The internal oscillator operates within a 200kHz to 600kHz frequency range.