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Is there a switching regulator that regulates output current instead of voltage?\nI need to generate three microcontroller-selected levels: 20, 250, 800 mA.\nInput is 1.8 to 2.7 volts.\nHow would you do that?

Unfortunately, we do not have a simple solution for your application. Depends on you input to output voltage (buck, boost or buck-boost) topology needs to be selected and then to use constant current regulator or controller (linear or switching) in order to get regulated current out. Answered by:
ON Semiconductor
2012-02-29 22:03:45.0