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switching regulator step down current sink

Question asked by P.H.B.A on Jun 15, 2015
Latest reply on Jun 17, 2015 by P.H.B.A


My question is: it is possible or not for a switching regulator to sink current ? For example if I have 2 switching regulators, 1 provides 9V output and the other provides 5V output, both have the same GND reference, if I connect a load between the 9V and 5V output, let's say a 20 Ohm resistor, then the 5V ourput has to sink the current that the resistor draws from the 9V output,  do I have 200mA through the resistor ? Can you give me a reference of a switching regulator that can sink current if existed ? Thank you in advance.

Best regards.