DescripTion
The LT®3741 is a fixed frequency synchronous step-down DC/DC controller designed to accurately regulate the outputcurrent at up to 20A. The average current-mode controller will maintain inductor current regulation over a wide output voltage range of 0V to (VIN – 2V). The regulated current is set by an analog voltage on the CTRL pins and an external sense resistor. Due to its unique topology, the LT3741 is capable of sourcing and sinking current. The regulated voltage and overvoltage protection are set with a voltage divider from the output to the FB pin. Soft-Start is provided to allow a gradual increase in the regulated current during startup. The switching frequency is programmable from 200kHz to 1MHz through an external resistor on the RT pin or through the use of the SYNC pin and an external clock signal.

FEATUREs
Control Pin Provides Accurate Control of Regulated Output Current
1.5% Voltage Regulation Accuracy
±6% Current Regulation Accuracy
6V to 36V Input Voltage Range
Wide Output Voltage Range Up to (VIN – 2V)
Average Current Mode Control
<1µA Shutdown Current
Up to 94% Efficiency
Additional Pin for Thermal Control of Load Current
Thermally Enhanced 4mm ×4mm QFN and 20-Pin FE Package