Patent ID: 8022749

Claim:
A circuit arrangement for the supply of voltage, comprising: a control arrangement; a charge pump to a first input of which a power supply voltage can be supplied, which is coupled at a second input to a first output of the control arrangement, and which comprises an output for the supply of an output voltage; a comparator, coupled at a first input to the output of the charge pump, comprising an output that delivers a comparator signal, wherein the output of the comparator is coupled to a first input of the control arrangement; and a ramp signal generator, the input of which is coupled to a second output of the control arrangement, and an output of which is coupled to a second input of the comparator in order to supply a reference output voltage, the ramp signal generator comprising: a low-pass filter that is connected upstream to the output of the ramp signal generator, the low-pass filter comprising a switched-capacitor circuit with a low-pass characteristic, and a bandgap circuit that is coupled via the low-pass filter to the output of the ramp signal generator; and an oscillator connected between the first output of the control arrangement and the charge pump, configured so that it can be switched off, and adapted to supply an oscillator signal to the charge pump.