The AX3161 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. An external compensation is easily to system
    stable; the low ESR output capacitor can be used.
    The AX3161 series operates at a switching frequency of 52KHz thus allow smaller
    sized filter components than what would be needed with lower frequency switching
    regulators. The output version included fixed 5V, 12V, and an adjustable type. The chips
    are available in standard TO263-5L, TO220-5L and TO220-5LR packages.


    Package Type TO263-5, TO220-5, TO220-5R
    Input Voltage (Max) 60V
    Output Current 2A
    Output Voltage Adj(Vfb=1.23V), 5V
    Frequency 52KHz
    Shutdown Current 100uA
    12 to 5V Efficiency(%) 83(2A)
    12 to 3.3V Efficiency(%) 79(2A)
    Availability NOW