Circuit, with a subcircuit (300) having a number of memory elements (311, 312, 313), with an activatable and deactivatable first voltage regulator (100) which is set up to output a supply voltage for an operating mode for the subcircuit (300), with a second voltage regulator (200) which is set up to output a supply voltage for a sleep mode for the subcircuit (300) in order to obtain information contained in the memory elements (311, 312, 313), - with a switching device (400) which is designed to connect a control input of the first voltage regulator (100) to the subcircuit (300) in order to enable an activation and deactivation of the first voltage regulator (100) by the subcircuit (300), - with a reset device (500) which is configured to activate the first voltage regulator (100) upon initial application of an input voltage (VB) to the circuit and subsequently to actuate the switching device (400) in order to activate and deactivate the first voltage regulator ( 100) by the subcircuit (300) independently of the previous activation to release, and - Wherein the sub-circuit (300) is adapted to control the deactivation and activation of the first voltage regulator (100) after the release by the reset device (500).
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