The AX3001 series are monolithic IC designed for a step-down DC/DC converter,
and own the ability of driving a 2A load without additional transistor. It saves board
space. The external shutdown function can be controlled by logic level and then come
into standby mode. The internal compensation makes feedback control having good
line and load regulation without external design. Regarding protected function,
thermal shutdown is to prevent over temperature operating from damage, and current
limit is against over current operating of the output switch. If current limit function
occurs and VFB is down below 0.5V, the switching frequency will be reduced. The
AX3001 series operates at a switching frequency of 150KHz thus allow smaller sized
filter components than what would be needed with lower frequency switching
regulators. The output version included fixed 3.3V, 5V, 12V, and an adjustable type.
The chips are available in a standard 8-lead SOP package.