Current boosted switching regulator
AssigneeLinear Technology Corporation
InventorCarl T. Nelson
Life of this patent
Estimating the term…
Abstract
A switching voltage regulator circuit is provided which regulates an input voltage to an output voltage of lesser magnitude, and which supplies an output current greater than the current through the switch employed in the circuit. The circuit includes a transformer which causes output current to be provided both when the switch is open and when it is closed.
Claims5
A switching voltage regulator circuit for connection to a power supply, the circuit generating at an output terminal an output voltage no greater in magnitude than the power supply voltage, comprising:
- switching means for controlling on and off conduction of an input current from the power supply;
- a diode;
- a capacitor connected to said diode and to the output terminal;
- and
- energy storage means connected to said diode, said capacitor and said switching means for providing input current to the output terminal and for storing energy when said switching means conducts input current, and for providing to the output terminal from the stored energy a current exceeding the input current when said switching means does not conduct input current, whereby the total current delivered to the output terminal exceeds the input current conducted by said switching means.
A switching voltage regulator circuit for connection to a power supply, the regulator circuit including an output terminal and a switching device for controlling conduction on and off of an input current from the power supply to generate an output voltage at the output terminal having a magnitude no greater than the magnitude of an input voltage from the power supply, comprising:
- a diode;
- a capacitor;
- and
- a transformer means having a primary winding and a secondary winding, wherein:
- said transformer has a primary-to-secondary winding turns ratio of 1:n, where n is less than 1;
- and
- said primary winding, the switching device and said capacitor are connected in series with the power supply in a first loop, and said secondary winding, said diode and said capacitor are connected in series in a second loop, the first and second loops including a plurality of nodes at least one of which is in common with the first and second loops and comprises the output terminal, whereby an output current is provided to the output terminal which exceeds the input current conducted by the switching device.
Dependencies are inferred from the claim text.