Hello
I want to use the LT8616 dc/dc-converter to power my application circuit.
The application needs a 3.3V and a 5V power supply, with an input voltage between 20V and 38V.
The normal load current is between 75mA und 800mA.
I went through the data sheet and tried to avoid the discontinuous current mode as well as I tried to reuse components, which are already implemented in any other circuit.
For the inductance I wanted to use 47µF, and for RT I wanted to implement 27k (-> f = 1,3 MHz) or maybe 22k (->f = 1,5 MHz)
in my Calculations, my typical current ripple (delta I) should be 42 mA at maximum input voltage (which would be far away from discontinuous current mode)
But in my LTspice Simulation, even at 24V input voltage @ 100mA load current, the converter is in discontinuous current mode, and the frequency of the current ripple is not plausible too.
I can not explain this behavior. With a load current of around 1A the simulation is pretty close to my calculations.
Can you help me, do i have a mistake in my Simulation?
