Microbump function assignment in a buck converter
An integrated circuit includes a buck converter controller, a PFET, an NFET that is coupled in common drain configuration to the PFET, a first microbump that is connected to the source of the PFET, a second microbump that is connected to the source of the NFET, a third microbump that is connected to the common drain node, a fourth microbump that is connected to a feedback input lead of the controller, and a plurality of other microbumps. The other microbumps are utilized to supply signals to and/or to conduct signals from the controller. A respective one of the four microbumps is disposed to occupy a respective one of the four corners of a square pattern. The other microbumps are disposed in a regular grid along with the four microbumps, but none of the other microbumps is disposed between any two of the four microbumps.
1. An integrated circuit comprising:
four microbumps disposed on a major surface of the integrated circuit, wherein the four microbumps are arranged in a square pattern such that one of the four microbumps is disposed at a respective corner of the square, and wherein there are no microbumps other than the four microbumps disposed on the major surface within the square;
a buck converter having a P-channel transistor, an N-channel transistor, and a control circuit, wherein a first of the four microbumps is connected to a source of the P-channel transistor, wherein a drain of the P-channel transistor is connected to a drain of the N-channel transistor and to a second of the four microbumps, wherein a source of the N-channel transistor is connected to a third of the four microbumps, and wherein a fourth of the four microbumps is connected to a feedback input of the control circuit;
additional microbumps disposed on the major surface of the integrated circuit, wherein the additional microbumps and the four microbumps are arranged on a regular grid, and wherein the buck converter receives control signals through the additional microbumps;
a first interconnection bus portion; and
a second interconnection bus portion, wherein the four microbumps, the buck converter and the first interconnection bus portion are part of a first tile of the integrated circuit, wherein the additional microbumps and the second interconnection bus portion are part of a second tile of the integrated circuit, and wherein the first interconnection bus portion links up with the second interconnection bus portion.
2. The integrated circuit of claim 1 , wherein the integrated circuit is a Chip Scale Package (CSP) device.
3. The integrated circuit of claim 1 , wherein one of the additional microbumps receives a signal that determines a current limit of the buck converter.
4. The integrated circuit of claim 1 , further comprising:
a microbump that outputs a signal that indicates when a regulated voltage on the second microbump meets a predetermined criteria.
5. The integrated circuit of claim 1 , wherein one of the additional microbumps receives a clock signal that is supplied to the buck converter.
6. The integrated circuit of claim 1 , further comprising:
a non-volatile memory that stores configuration information that configures the buck converter.
7. The integrated circuit of claim 1 , wherein one of the additional microbumps receives an enable signal that enables the buck converter.
8. The integrated circuit of claim 1 , further comprising:
a plurality of bits of non-volatile memory, wherein the bits of non-volatile memory store a plurality of bits of configuration information, and wherein the bits of configuration information determine whether one of the additional microbumps is coupled to the buck converter.
9. The integrated circuit of claim 1 , wherein the buck converter is configurable, and wherein signals received on the additional microbumps determine how the buck converter is configured.
10. The integrated circuit of claim 1 , wherein the second of the four microbumps is coupled to a first lead of an inductor, and wherein the fourth of the four microbumps is coupled to a second lead of the inductor.
11. The integrated circuit of claim 1 , further comprising:
means for storing configuration information that configures the buck converter.
12. The integrated circuit of claim 1 , further comprising:
means for configuring the buck converter via signals received onto the additional microbumps.
13. The integrated circuit of claim 1 , further comprising:
means for receiving a signal onto one of the additional microbumps wherein the signal determines a current limit of the buck converter.
14. An integrated circuit comprising:
four microbumps disposed on a major surface of the integrated circuit, wherein the four microbumps are arranged in a square pattern such that one of the four microbumps is disposed at a respective corner of the square, and wherein there are no microbumps other than the four microbumps disposed on the major surface within the square;
a buck converter having a P-channel transistor, an N-channel transistor, and a control circuit, wherein a first of the four microbumps is connected to a source of the P-channel transistor, wherein a drain of the P-channel transistor is connected to a drain of the N-channel transistor and to a second of the four microbumps, wherein a source of the N-channel transistor is connected to a third of the four microbumps, and wherein a fourth of the four microbumps is connected to a feedback input of the control circuit; and
additional microbumps disposed on the major surface of the integrated circuit, wherein the additional microbumps and the four microbumps are arranged on a regular grid, wherein the buck converter receives control signals through the additional microbumps, wherein the four microbumps and the additional microbumps are directly connected to a printed circuit board, and wherein an inductor is fixed to the printed circuit board and is coupled to the second microbump.
15. An integrated circuit comprising:
four microbumps disposed on a major surface of the integrated circuit, wherein the four microbumps are arranged in a square pattern such that one of the four microbumps is disposed at a respective corner of the square, and wherein there are no microbumps other than the four microbumps disposed on the major surface within the square;
a buck converter having a P-channel transistor, an N-channel transistor, and a control circuit, wherein a first of the four microbumps is connected to a source of the P-channel transistor, wherein a drain of the P-channel transistor is connected to a drain of the N-channel transistor and to a second of the four microbumps, wherein a source of the N-channel transistor is connected to a third of the four microbumps, and wherein a fourth of the four microbumps is connected to a feedback input of the control circuit; and
additional microbumps disposed on the major surface of the integrated circuit, wherein the additional microbumps and the four microbumps are arranged on a regular grid, and wherein the buck converter receives control signals through the additional microbumps.
16. The integrated circuit of claim 1 , wherein the additional microbumps and the four microbumps are electrically conductive.
17. An integrated circuit comprising:
four microbumps disposed on a major surface of the integrated circuit, wherein the four microbumps are directly connected to a printed circuit board, wherein the four microbumps are arranged in a square pattern such that one of the four microbumps is disposed at a respective corner of the square, and wherein there are no microbumps other than the four microbumps disposed on the major surface within the square; and
a buck converter having a P-channel transistor, an N-channel transistor, and a control circuit, wherein a first of the four microbumps is connected to a source of the P-channel transistor, wherein a drain of the P-channel transistor is connected to a drain of the N-channel transistor and to a second of the four microbumps, wherein a source of the N-channel transistor is connected to a third of the four microbumps, wherein a fourth of the four microbumps is connected to a feedback input of the control circuit, and wherein an inductor is fixed to the printed circuit board and is coupled to the second of the four microbumps.
18. The integrated circuit of claim 17 , wherein the four microbumps are electrically conductive.
19. An integrated circuit comprising:
four microbumps disposed on a major surface of the integrated circuit, wherein the four microbumps are directly connected to a printed circuit board, wherein the four microbumps are arranged in a square pattern such that one of the four microbumps is disposed at a respective corner of the square, and wherein there are no microbumps other than the four microbumps disposed on the major surface within the square;
a buck converter having a P-channel transistor, an N-channel transistor, and a control circuit, wherein a first of the four microbumps is connected to a source of the P-channel transistor, wherein a drain of the P-channel transistor is connected to a drain of the N-channel transistor and to a second of the four microbumps, wherein a source of the N-channel transistor is connected to a third of the four microbumps, wherein a fourth of the four microbumps is connected to a feedback input of the control circuit, and wherein an inductor is fixed to the printed circuit board and is coupled to the second of the four microbumps; and
a first interconnection bus portion, wherein the four microbumps, the buck converter and the first interconnection bus portion are part of a first tile of the integrated circuit, and wherein the first interconnection bus portion links up with a second interconnection bus portion of a second tile of the integrated circuit.
20. The integrated circuit of claim 19 , further comprising:
an additional microbump, wherein signals received on the additional microbump determine how the buck converter is configured.
21. The integrated circuit of claim 19 , further comprising:
an additional microbump disposed on the second tile, wherein signals received on the additional microbump and conveyed to the first tile via the second interconnection bus portion and the first interconnection bus portion determine how the buck converter is configured.
22. The integrated circuit of claim 19 , further comprising:
a non-volatile memory that stores configuration information that configures the buck converter.
23. The integrated circuit of claim 19 , further comprising:
an additional microbump that outputs a signal that indicates when a regulated voltage on the second of the four microbumps meets a predetermined criteria.
24. The integrated circuit of claim 19 , further comprising:
an additional microbump that receives a signal that determines a current limit of the buck converter.
25. The integrated circuit of claim 19 , wherein the second of the four microbumps is coupled to a first lead of the inductor, and wherein the fourth of the four microbumps is coupled to a second lead of the inductor.
26. An integrated circuit comprising:
four microbumps disposed on a major surface of the integrated circuit, wherein the four microbumps are arranged in a pattern such that one of the four microbumps is disposed at a respective corner of the pattern, wherein there are no microbumps other than the four microbumps disposed on the major surface within the pattern, and wherein the pattern is taken from the group consisting of: a parallelogram shape and a diamond shape;
a buck converter having a P-channel transistor, an N-channel transistor, and a control circuit, wherein a first of the four microbumps is connected to a source of the P-channel transistor, wherein a drain of the P-channel transistor is connected to a drain of the N-channel transistor and to a second of the four microbumps, wherein a source of the N-channel transistor is connected to a third of the four microbumps, and wherein a fourth of the four microbumps is connected to a feedback input of the control circuit; and
additional microbumps disposed on the major surface of the integrated circuit, wherein the additional microbumps and the four microbumps are arranged on a regular grid, and wherein the buck converter receives control signals through the additional microbumps.
27. The integrated circuit of claim 26 , wherein the additional microbumps and the four microbumps are electrically conductive.