Apparatus and methods facilitating power regulation for an implantable device

• US 9,242,109 B2
• Filed: 03/15/2013
• Issued: 01/26/2016
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Gordon, Charles, Hossain, Shohan, Liang, Weizheng, Reinke, James D., Wildes, William D
• Primary Examiner(s): Layno, Carl H
• Assistant Examiner(s): Morales, Jon Eric C
• Application Number:
  US13/837,188
• Publication Number:
  US 20140277277A1
• Time in Patent Office: 1,047 Days
• Field of Search: 607/61
• US Class Current: 1/1
• CPC Class Codes: A61N 1/37276 characterised by means for reducing power consumption during telemetry
• CPC Class Codes: A61N 1/378 Electrical supply
• CPC Class Codes: A61N 1/3975 Power supply A61N1/378 takes precedence

Abstract

Apparatus and methods configured to perform power regulation for an implantable device are presented. In an aspect, an implantable device can include a substrate that forms at least part of a body of the implantable device and a circuit disposed on or within the substrate. The circuit can include a high load power regulator configured to provide a first current level to components of the implantable device and a low load power regulator configured to provide a second current level to components of the implantable device, wherein the second current level is lower that the first current level. The circuit can also include a regulator switch configured to enable or disable current draw from the high load power regulator and the low load power regulator as a function of power state and associated power requirement of the components of the implantable device.

Claims

1. An implantable device, comprising:

a substrate that forms at least part of a body of the implantable device; and

a circuit disposed on or within the substrate and comprising;

a high load power regulator configured to provide a first current level to one or more components of the implantable device;

a low load power regulator configured to provide a second current level to the one or more components of the implantable device, wherein the second current level is lower that the first current level; and

a regulator switch configured to simultaneously enable or disable current draw from the high load power regulator and the low load power regulator as a function of power state and associated power requirement of the one or more or more components of the implantable device, such that the first current level can be provided to at least a first of the one or more components while simultaneously providing the second current level to at least a second of the one or more components.

2. The implantable device of claim 1, wherein the one or more components include a high power component and a low power component, wherein the high power component employs a higher current for operation than the low power component.

3. The implantable device of claim 2, wherein the regulator switch is configured to enable current draw from the low load power regulator and disable current draw from the high load power regulator in response to the high power component being in a passive state.

4. The implantable device of claim 2, wherein the regulator switch is configured to disable current draw from the low load power regulator and enable current draw from the high load power regulator in response to the high power component being in an active state.

5. The implantable device of claim 2, wherein the high power component is a digital component and the low power component is an analog component.

6. The implantable device of claim 1, further comprising one or more power sources configured to provide power to the high load power regulator and the low load power regulator.

7. The implantable device of claim 6, wherein the one or more power sources includes a first battery coupled to the high load power regulator and a second battery coupled to the low load power regulator.

8. A power regulation system for an implantable medical device, comprising:

a processor operatively coupled to the implantable medical device;

a non-transitory computer readable medium that stores computer executable components, wherein the non-transitory computer readable medium comprises flash memory;

a central processing unit (CPU) power regulator configured to provide a first current level to the processor;

an analog power regulator configured to provide a second current level to the processor, wherein the second current level is lower that the first current level;

a flash power regulator configured to provide a third current level to the flash memory; and

a regulator switch configured to enable or disable current draw from the CPU power regulator and the analog power regulator as a function of a power state of the processor, wherein the third current level is higher than the first current level, and wherein the regulator switch is configured to enable current draw from the flash power regulator and disable current draw from the analog power regulator and CPU power regulator in response to programming or erasing of the flash memory.

9. The power regulation system of claim 8, wherein the CPU power regulator is configured to provide the first current level for digital components of the processor and the analog power regulator is configured to provide the second current level for analog components of the processor.

10. The power regulation system of claim 8, wherein the analog power regulator is further configured to provide the second current level to analog components of the implantable medical device.

11. The system of claim 8, wherein the processor has a duty cycle from about 0.1 percent to about 5.0 percent and the regulator switch is configured to enable or disable current draw from the CPU power regulator and the analog power regulator as a function of the duty cycle.

12. The system of claim 8, wherein the regulator switch is configured to enable current draw from the analog power regulator and disable current draw from the CPU power regulator in response to the processor being in an off state.

13. The system of claim 8, wherein the regulator switch is configured to disable current draw from the analog power regulator and enable current draw from the CPU power regulator in response to the processor being in an on state.

14. The system of claim 8, wherein the CPU power regulator is configured to turn on before the processor is turned on in response to receipt of a signal indicating an event that requires the processor to be turned on, the system further comprising:

a delay component configured to effect a delay to digital operation of the processor to allow the CPU power regulator to stabilize, wherein the regulator switch is configured to enable current draw from the CPU power regulator after the CPU power regulator stabilizes.

15. The system of claim 14, further comprising a high frequency oscillator configured to provide a first dynamic current to the CPU regulator in response to turning on of the CPU power regulator.

16. The system of claim 8, wherein the CPU regulator is configured to provide greater than about 40.0 microamperes (μ

A) of current to the processor.

17. The system of claim 8, wherein the analog power regulator is configured to provide less than about 15.0 microamperes (μ

A) of current to the processor.

18. The system of claim 8, further comprising:

at least one battery, wherein the CPU power regulator and the analog power regulator are configured to regulate power drawn from the at least one battery.

19. The system of claim 8, wherein the CPU power regulator is configured to regulate power supplied from a first battery and the analog power regulator is configured to regulate power supplied from a charge pump coupled to a second battery.

20. The system of claim 8, wherein the processor, the non-transitory computer readable medium, the CPU power regulator, the analog power regulator and the at least one battery are encapsulated in a housing of the implantable medical device.

21. The system of claim 8, wherein the regulator switch comprises a multiplexor.

22. A method comprising:

providing, via an analog power regulator, a first current level to at least one analog component of the processer of an implantable device in response to digital components of the processor being in an off state;

receiving a trigger signal indicating a request to turn on digital operation of the digital components, and in response to the receiving the trigger signal;

turning on operation of a central processing unit (CPU) power regulator;

turning on the digital operation of the digital components;

providing, via the CPU power regulator, a second current level to the processor, wherein the second current level is higher than the first current level;

simultaneously enabling current draw from the analog power regulator and the CPU power regulator such that the first current level can be provided to the at least one analog component and the second current level can be provided to digital components as a function of power state and associated power requirement of the components of the processor; and

powering the digital operation of the digital components via the CPU power regulator.

23. The method of claim 22, further comprising, in response to the receiving the trigger signal:

turning on the operation of the CPU power regulator prior to turning off the operation of the analog power regulator; and

delaying the turning on the digital operation of the digital components and stabilizing the CPU power regulator, wherein the turning off the operation of the analog power regulator, the turning on the digital operation of the digital components and the providing the second current level to the processor are performed in response to the stabilizing the CPU power regulator.

24. The method of claim 23, wherein the turning on the operation of the CPU power regulator comprises providing the CPU power regulator a first dynamic current via a high frequency oscillator.

25. The method of claim 22, further comprising:

receiving a stop indicating a request to turn off digital operation of the digital components, and in response to the receiving the stop signal;

turning off operation of the CPU power regulator;

turning back on operation of the analog power regulator;

turning off the digital operation of the digital components; and

re-providing, via the analog power regulator, the first current level to the processor.

26. The method of claim 22, wherein the providing the first current level to the processor further comprises powering operation of analog components of the processor.

27. The method of claim 22, wherein the digital operation is powered via a regulator switch, by enabling current draw from the CPU power regulator, wherein the regulator switch comprises a multiplexor.

28. A power regulation system for an implantable medical device, comprising:

a processor operatively coupled to the implantable medical device;

a non-transitory computer readable medium that stores computer executable components;

a central processing unit (CPU) power regulator configured to provide a first current level to the processor, wherein the CPU power regulator is configured to turn on before the processor is turned on in response to receipt of a signal indicating an event that requires the processor to be turned on;

an analog power regulator configured to provide a second current level to the processor, wherein the second current level is lower that the first current level;

a regulator switch configured to enable or disable current draw from the CPU power regulator and the analog power regulator as a function of a power state of the processor;

a delay component configured to effect a delay to digital operation of the processor to allow the CPU power regulator to stabilize, wherein the regulator switch is configured to enable current draw from the CPU power regulator after the CPU power regulator stabilizes; and

a high frequency oscillator configured to provide a first dynamic current to the CPU regulator in response to turning on of the CPU power regulator, wherein the high frequency oscillator and the CPU power regulator are configured to turn off and the regulator switch are configured to enable current draw from the analog power regulator in response to receipt of a signal indicating completion of the event.