Patent ID: 7859511

Claim:
A DC-DC converter for converting a DC input voltage and supplying a DC output voltage at a voltage output terminal through a voltage supply circuit loop, the DC-DC converter comprising: a transistor based switching unit, having a source, a drain, and a gate, the drain being connected to the voltage supply circuit loop, the source being connected to a ground potential; a comparator, having a saw-tooth wave signal input terminal, a differential signal input terminal, and an output terminal, the saw-tooth wave signal input terminal receiving a saw-tooth wave signal, the output terminal being connected through a gate driver circuit to the gate of the transistor based switching unit; an output voltage detection circuit, being electrically connected to the voltage supply circuit loop to detect a voltage level of the DC output voltage and generating a feedback signal at a feedback node; a feedback differential amplification circuit, having a reference voltage input terminal, a feedback signal input terminal, and a differential signal output terminal, the reference voltage input terminal receiving a reference voltage, the feedback signal input terminal receiving the feedback signal from the output voltage detection circuit, the differential signal output terminal being connected to the differential signal input terminal of the comparator; and a temperature compensation circuit connected between the feedback differential amplification circuit and the output voltage detection circuit and comprising: a temperature detection circuit that detects an ambient temperature and, in response thereto, generates a temperature signal, and a current source circuit connected between the feedback signal input terminal of the feedback differential amplification circuit and the output voltage detection circuit, wherein the current source circuit, based on the temperature signal from the temperature detection circuit, generates an electrical current and generates a compensation voltage proportional to the electrical current, the compensation voltage being applied to the DC output voltage to thereby regulate the voltage level of the DC output voltage.