DC/DC converter with improved stability
First Claim
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1. A DC-DC converter for converting an input DC voltage to an output DC voltage, comprising:
- a first switch coupled to said input voltage and operable for generating said output DC voltage at an output node;
a capacitor coupled to said output node and operable for determining a zero frequency of said DC-DC converter;
a first resistor for coupling said capacitor to ground; and
a voltage divider coupled to said capacitor in parallel and coupled to said first resistor in series and operable for determining said zero frequency.
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Abstract
A DC/DC converter includes a switch, an inductor, a capacitor, a resistor, and a voltage divider. The switch is coupled to the input voltage. The inductor is used for coupling the first switch to an output node of the DC/DC converter so as to generate the output voltage at the output node. The capacitor is coupled to the output voltage. The resistor is coupled to the capacitor in series, and is coupled to ground. The voltage divider is coupled across the capacitor so as to reduce the zero frequency of the DC/DC converter.
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Citations
21 Claims
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1. A DC-DC converter for converting an input DC voltage to an output DC voltage, comprising:
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a first switch coupled to said input voltage and operable for generating said output DC voltage at an output node; a capacitor coupled to said output node and operable for determining a zero frequency of said DC-DC converter; a first resistor for coupling said capacitor to ground; and a voltage divider coupled to said capacitor in parallel and coupled to said first resistor in series and operable for determining said zero frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for converting an input DC voltage to an output DC voltage, comprising:
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receiving said input DC voltage; controlling a first switch to discontinuously couple said input DC voltage to an inductor for generating said output DC voltage; coupling an capacitor to said inductor; coupling said capacitor to ground through a first resistor; and generating a feedback voltage signal based on said output DC voltage at a voltage divider coupled in parallel to said capacitor. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification