Dear all
I used LM43601 in our application and had very serious issues with unreliable start up. The device locks up to a positive voltage of approximately 0.5V.
My conclusion is that it has something to do with the BIAS pin. If I connect the BIAS pin to device ground (which is the negative output rail of the circuit in this case) the circuit seems to work reliably. It tested with different loads through a temperature range of 0°C to 100°C and it always powers up properly and can deliver currents much higher than needed for our application.
Is this an error on the application note or something that I have overlooked in the design? Is the circuit reliable with the BIAS pin connected to device ground? I have attached the actual circuit from our application with the component values I used.
