What will be the vout and Vin port impedance when there is no load connected to the regulator
How to debug if both ports are showing open circuit
Both Vin and Vout impedance can be relatively high. Is this for a loose module or in circuit, part is running or shut down?If making a simple measurement (ie using DMM) then only when the circuit is off would the measurement be reasonable, in that case for Vin measurement you are basically measuring open mosfet impedance (ie MOhm range), on the output this could show lower since there is a voltage divider to set the output. If operating in circuit and powered on the LTpowerCAD design tool for the part can give a good estimation of the input and output impedances over frequency. Thanks.
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