Linear regulator with conditional switched mode preregulation
AssigneeNokia Mobile Phones Ltd.
InventorErkki Nokkonen
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Abstract
The invention regards a method and device for the current feed of a mobile communications device in a device comprising at least one dissipation-type voltage regulator (201), such as a linear regulator, in which the first voltage value of the regulator's input voltage (Vs, 211) is decreased with voltage-decreasing means (202-207, 212) to the second voltage value of the input voltage (Vs) compared to the used voltage (Vbat, 208), which is smaller than the first input voltage, to form the voltage regulator's (201) output voltage (Vout, 209).
Claims15
A regulator coupling comprising:
- a dissipation-type voltage regulator, which has an input for receiving input voltage (Vs) and an output for providing output voltage (Vout), and
- means (Vbat) for providing said input voltage to the voltage regulator, wherein the regulator coupling comprises:
- a first and second operating mode,
- means for providing said input voltage with a first voltage value in said first operating mode, and
- means for providing said input voltage with a second voltage value in said second operating mode, in which the second voltage value is smaller than said first voltage value.
A method for using a dissipation-type voltage regulator, in which an input voltage (Vs) is formed to the voltage regulator and an output voltage (Vout) is gained from voltage regulator, wherein the method comprises the steps of:
- using the voltage regulator in a first and a second operating mode,
- forming a first voltage value for said input voltage (Vs) in the first operating mode, and
- forming a second voltage value for said input voltage (Vs) in the second operating mode, in which the second voltage value is smaller than said first voltage value.
An electronic device comprising:
- at least one dissipation-type voltage regulator, which has an input for receiving input voltage (Vs) and an output for providing output voltage (Vout), and
- means for providing said input voltage to the voltage regulator, wherein the device comprises:
- a first and second operating mode,
- means for providing said input voltage with a first voltage value in said first operating mode, and
- means for providing said input voltage with a second voltage value in said second operating mode, in which the second voltage value is smaller than said first voltage value.
Dependencies are inferred from the claim text.