BUCK REGULATION OF A BOOST REGULATOR
First Claim
1. A buck regulation method for a boost regulator including an inductor connected between an input terminal of the boost regulator and a switching node, a first switch connected between the switching node and a reference potential terminal, and a PMOS transistor connected between the switching node and an output terminal of the boost regulator for use as a second switch, the buck regulation method comprising:
- A.) maintaining the first switch off; and
B.) switching the PMOS transistor on and off to convert an input voltage at the input terminal into an output voltage at the output terminal, wherein the output voltage is lower than the input voltage.
1 Assignment
0 Petitions
Accused Products
Abstract
Buck regulation methods are provided for a boost regulator to convert an input voltage into an output voltage lower than the input voltage. The buck regulation methods can reduce the variation of the inductor current of the boost regulator, and thereby decrease power consumption and increase the efficiency of the boost regulator under buck regulation.
-
Citations
8 Claims
-
1. A buck regulation method for a boost regulator including an inductor connected between an input terminal of the boost regulator and a switching node, a first switch connected between the switching node and a reference potential terminal, and a PMOS transistor connected between the switching node and an output terminal of the boost regulator for use as a second switch, the buck regulation method comprising:
-
A.) maintaining the first switch off; and B.) switching the PMOS transistor on and off to convert an input voltage at the input terminal into an output voltage at the output terminal, wherein the output voltage is lower than the input voltage. - View Dependent Claims (2)
-
-
3. A buck regulation method for a boost regulator including an inductor connected between an input terminal of the boost regulator and a switching node, a first switch connected between the switching node and a reference potential terminal, and a PMOS transistor connected between the switching node and an output terminal of the boost regulator for use as a second switch, the buck regulation method comprising:
-
A.) turning off the PMOS transistor and turning on the first switch for charging the inductor; B.) turning off the first switch and turning on the PMOS transistor; and C.) turning off both the first switch and the PMOS transistor for discharging the inductor. - View Dependent Claims (4)
-
-
5. A boost regulator comprising:
-
an input terminal receiving an input voltage; an output terminal providing an output voltage; a reference potential terminal; a switching node; an inductor connected between the input terminal and the switching node; a first switch connected between the switching node and the reference potential terminal; a PMOS transistor connected between the switching node and the output terminal for use as a second switch; and a controller connected to the first switch and the PMOS transistor, configured to control the first switch and the PMOS transistor; wherein when the boost regulator is in a down mode, the controller maintains the first switch off and switches the PMOS transistor on and off to convert the input voltage into the output voltage smaller than the input voltage. - View Dependent Claims (6)
-
-
7. A boost regulator comprising:
-
an input terminal receiving an input voltage; an output terminal providing an output voltage; a reference potential terminal; a switching node; an inductor connected between the input terminal and the switching node; a first switch connected between the switching node and the reference potential terminal; a PMOS transistor connected between the switching node and the output terminal for use as a second switch; and a controller connected to the first switch and the PMOS transistor, configured to control the first switch and the PMOS transistor; wherein when the boost regulator is in a down mode, the controller executes following steps in sequence; turning off the PMOS transistor and turning on the first switch for charging the inductor; turning off the first switch and turning on the PMOS transistor; and turning off both the first switch and the PMOS transistor for discharging the inductor. - View Dependent Claims (8)
-
Specification