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US 2013/0027134 A1Published application
Switching regulator with variable compensation
AssigneeSummit Microelectronics, Inc.
InventorZhaohui Zhu
Life of this patent
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Abstract
A switching regulator circuit includes a power stage and a compensation network. The compensation network includes a programmable transconductance (gm), having a first selectable transconductance such a closed loop transfer function of the switching regulator circuit may be characterized by a first transfer function having a having a first DC open loop gain and a first bandwidth, and by a second transfer function having a second DC open loop gain and a second bandwidth.
Claims17
A circuit comprising:
- a switching power circuit having a first input for a connection to an input voltage and having a second input, the switching power circuit further having an output to supply an output voltage to a load;
- and
- a programmable compensation circuit having a selectable transconductance (gm) and comprising an input section for a connection to the load to receive the output voltage across the load and an output section connected to the second input of the switching power circuit to provide a control signal to the switching power circuit,
- the programmable compensation circuit having a first selectable gm wherein a closed loop transfer function of the circuit is represented by a first transfer function having a first DC open loop gain and a first bandwidth,
- the programmable compensation circuit having at least a second selectable gm wherein the closed loop transfer function of the circuit is represented by a second transfer function having a second DC open loop gain and a second bandwidth.
2 more elements
A method in a circuit comprising:
- receiving an input voltage at a switching power circuit;
- producing an output of the switching power circuit to be supplied to load as an output voltage;
- accessing a user-provided input value;
- using the input value to configure a programmable compensation network with a selectable transconductance (gm);
- receiving at an input section of the programmable compensation network the output voltage across the load;
- and
- providing an output from an output section of the programmable compensation network as a control signal to the switching power circuit,
- wherein the programmable compensation circuit has a first selectable gm wherein a closed loop transfer function of the circuit is represented by a first transfer function having a first DC open loop gain and a first bandwidth,
- wherein the programmable compensation circuit has at least a second selectable gm wherein the closed loop transfer function of the circuit is represented by a second transfer function having a second DC open loop gain and a second bandwidth.
6 more elements
Dependencies are inferred from the claim text.