Self-configurable multi-regulator ASIC core power delivery

• US 20090160423A1
• Filed: 12/21/2007
• Published: 06/25/2009
• Est. Priority Date: 12/21/2007
• Status: Abandoned Application

• Current Assignee: SanDisk Technologies LLC (Western Digital Corporation)
• Original Assignee: SanDisk Corporation (Western Digital Corporation)
• Inventors: Chi, Steve X., Nguyen, Daniel P., Lai, Po-Shen, Wang, Yongliang, Condito, Vincent Anthony, Bhuiyan, Ekram Hossain
• Application Number:
  US12/005,126
• Publication Number:
  US 20090160423A1
• Time in Patent Office: Days
• US Class Current: 323/352
• CPC Class Codes: H03K 19/0016 by using a control or a clock signal, e.g. in order to apply power supply

Abstract

An electronic product includes an application specific semiconductor circuit (ASIC) including in its circuitry both a linear regulator module for use with an optional external capacitance and a capless regulator module coupled to internal capacitance of the product. The capless regulator module includes both a low-power sub-module and a high-power sub-module. Control logic of the ASIC is configured to determine if an external capacitance is present. If so, the control logic causes the high-power capless regulator sub-module to be used during a power-up phase of the ASIC; if not, only the low-power capless regulator sub-module is used during the power-up phase of the ASIC. After power-up of the ASIC, the control logic may select the linear regulator module for certain times of operation and the capless regulator module for other times of operation or it may select one or the other for all times of post-power-up operation.

Claims

1. An electronic apparatus, comprising:

an application specific semiconductor chip (ASIC) device;

a linear regulator module configured to be optionally coupled in operation to an external-to-the-ASIC device capacitor via a node;

a capless regulator module coupled to an internal capacitance of the electronic product via the node, the capless regulator module including a low-power sub-module and a high-power sub-module, the high-power sub-module configured to provide a larger amount of electrical current than the low-power sub-module; and

control logic executable by the ASIC device, the control logic configured to detect the presence of the optional external capacitance and responsive thereto configured to select for use during a power-up phase of the ASIC at least the high-power sub-module of the capless regulator module if the optional external-to-the-ASIC device capacitor is detected.

2. The apparatus of claim 1, wherein the control logic is configured to select for use during the power-up phase of the ASIC device at least the low-power sub-module of the capless regulator module.

3. The apparatus of claim 1, wherein the linear regulator module includes at least a first and a second linear regulator sub-module, the first linear regulator sub-module configured to provide up to a first level of electrical current and the second linear regulator sub-module configured to provide up to a second level of electrical current.

4. The apparatus of claim 3, wherein the second level of electrical current is greater than the first level of electrical current.

5. The apparatus of claim 1, wherein the apparatus is initially configured to use the capless regulator module prior for providing power to power-up the ASIC device during at least a portion of the power-up phase of the ASIC device.

6. The apparatus of claim 1, wherein the apparatus is initially configured to use the low-power sub-module of the capless regulator module for providing power to power-up the ASIC device during at least a portion of the power-up phase of the ASIC device.

7. The apparatus of claim 1, wherein the control logic is configured to detect the presence of the optional external-to-the-ASIC device capacitor at least in part by discharging the node.

8. The apparatus of claim 1, wherein the control logic is configured to detect the presence of the optional external-to-the-ASIC device capacitor at least in part by charging the node.

9. The apparatus of claim 1, wherein the control logic is configured to detect the presence of the optional external-to-the-ASIC device capacitor at least in part by both discharging and subsequently charging the node.

10. The apparatus of claim 1, further comprising:

a configuration register configured to be read by the ASIC device, the configuration register configured to be programmed with a selection of one of the capless regulator module and the linear regulator module for use by the ASIC device after the power-up phase is completed, wherein the ASIC device is configured to respond to the selection by selecting the programmed one of the capless regulator module and the linear regulator module for use after the power-up phase is completed.

11. A memory device, comprising:

a memory array;

an interface circuit configured to communicate with a host device;

a controller coupled to communicate with the memory array and with the interface circuit, the controller implemented on an ASIC device, the controller including;

a linear regulator module configured to be optionally coupled in operation to an external-to-the-ASIC device capacitor via a node;

a capless regulator module coupled to an internal capacitance of the electronic product via the node, the capless regulator module including a low-power sub-module and a high-power sub-module, the high-power sub-module configured to provide a larger amount of electrical current than the low-power sub-module; and

control logic executable by the ASIC device, the control logic configured to detect the presence of the optional external-to-the-ASIC device capacitor and responsive thereto configured to select for use during a power-up phase of the ASIC device at least the high-power sub-module of the capless regulator module if the optional external-to-the-ASIC capacitor is detected.

12. The memory device of claim 11, wherein the control logic is configured to select for use during the power-up phase of the ASIC device at least the low-power sub-module of the capless regulator module.

13. The memory device of claim 11, wherein the linear regulator module includes at least a first and a second linear regulator sub-module, the first linear regulator sub-module configured to provide up to a first level of electrical current and the second linear regulator sub-module configured to provide up to a second level of electrical current.

14. The memory device of claim 13, wherein the second level of electrical current is greater than the first level of electrical current.

15. The memory device of claim 11, wherein the memory device is initially configured to use the capless regulator module prior for providing power to power-up the ASIC device during at least a portion of the power-up phase of the ASIC device.

16. The memory device of claim 11, wherein the memory device is initially configured to use the low-power sub-module of the capless regulator module for providing power to power-up the ASIC device during at least a portion of the power-up phase of the ASIC device.

17. The memory device of claim 11, wherein the control logic is configured to detect the presence of the optional external-to-the-ASIC device capacitor at least in part by discharging the node.

18. The memory device of claim 11, wherein the control logic is configured to detect the presence of the optional external-to-the-ASIC device capacitor at least in part by charging the node.

19. The memory device of claim 11, wherein the control logic is configured to detect the presence of the optional external-to-the-ASIC device capacitor at least in part by both discharging and subsequently charging the node.

20. The memory device of claim 11, further comprising:

a configuration register configured to be read by the ASIC device, the configuration register configured to be programmed with a selection of one of the capless regulator module and the linear regulator module for use by the ASIC device after the power-up phase is completed, wherein the ASIC device is configured to respond to the selection by selecting the programmed one of the capless regulator module and the linear regulator module for use after the power-up phase is completed.