Voltage regulator with reduced power loss
AssigneeSeiko Instruments Inc.
InventorAtsushi Sakurai
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Abstract
To provide a voltage regulator with high safety in which its characteristics do not deteriorate and the regulator is not destroyed even if it is used with a large loss, for example, it is erroneously used in excess of an allowable loss. The voltage regulator of the present invention is provided with a loss detecting circuit that functions so as to lower an output voltage when a loss increases. When the loss detecting circuit is activated, the output voltage falls and an output current decreases, whereby the loss can be reduced.
Claims7
A voltage regulator comprising:
- an error amplifier circuit that receives an output from a reference voltage generation circuit as one input;
- an output circuit that is controlled by an output of the error amplifier circuit;
- a voltage dividing circuit that is connected to the output circuit in series, the error amplifier circuit receiving a divided voltage from the voltage dividing circuit as the other input;
- and
- a first loss detecting circuit that is connected between the one input of the error amplifier circuit and a GND terminal.
A voltage regulator comprising a detecting circuit for monitoring a loss that is a product of a voltage difference between an input terminal and an output terminal and an output current,
- wherein an output voltage is lowered when an amount of loss exceeds an arbitrary value.
Dependencies are inferred from the claim text.