Capacitive voltage dividers coupled to voltage regulators

1. A method, comprising:

receiving an input voltage at a power management (PM) component of a memory sub-system, wherein the PM component comprises a capacitive voltage divider (CVD), a linear voltage regulator (LVR), and a switching voltage regulator (SVR);

determining, by a monitoring unit of the PM component, that the input voltage corresponds to a low power mode of the memory sub-system and that the input voltage is higher than an uppermost supply voltage at which a memory component of the memory sub-system is configured to operate;

selectably coupling, responsive to determination of the low power mode, the CVD and the LVR; and

sequentially reducing the input voltage by the CVD and the LVR to a supply voltage for the memory component, wherein the supply voltage is not higher than the uppermost supply voltage at which the memory component is configured to operate.

2. The memory sub-system of claim 1 , wherein the memory sub-system is a solid-state drive (SSD).

3. The method of claim 1 , further comprising:

receiving the input voltage as a first supply voltage to the CVD;

responsive to the determination of the low power mode, disabling the SVR and enabling the LVR;

modifying the first supply voltage, by the CVD, to a second supply voltage compatible with operation of the LVR, wherein the second supply voltage is less than a supply voltage compatible with operation of the SVR;

providing the second supply voltage to the LVR;

reducing the second supply voltage, by the LVR, to a third supply voltage compatible with operation of the memory component; and

providing, by the PM component, the third supply voltage to the memory component.

4. The method of claim 1 , further comprising:

responsive to the determination of the low power mode, disabling the SVR and enabling the LVR;

receiving the input voltage as a first supply voltage to the LVR;

reducing the first supply voltage, by the LVR, to a second supply voltage compatible with operation of the CVD;

providing the second supply voltage to the CVD;

reducing the second supply voltage, by the CVD, to a third supply voltage compatible with operation of the memory component; and

providing, by the PM component, the third supply voltage to the memory component.

5. The method of claim 1 , further comprising reducing, by the LVR, the first supply voltage to a particular second supply voltage that is divisible by the CVD to the third supply voltage compatible with operation of a particular memory component.

6. The method of claim 1 , further comprising:

configuring the LVR to produce a first input-output voltage differential that is less than a second input-output voltage differential that the SVR is configured to produce;

wherein a two-stage reduction of the input voltage by the LVR and the CVD is more energy efficient than a one- or two-stage reduction of the input voltage utilizing the SVR based, at least in part, on a difference between the first and second input-output voltage differentials.

7. A memory sub-system, comprising:

a capacitive voltage divider (CVD) selectably coupled to one of a linear voltage regulator (LVR) and a switching voltage regulator (SVR); and

a controller coupled to the CVD, the LVR, and the SVR, wherein the controller is configured, responsive to a determination that the memory sub-system receives an input voltage in a particular range as a first supply voltage, to direct that:

the CVD reduces, by connection of a plurality of capacitors, the first supply voltage to a second supply voltage compatible with operation of the LVR; and

the CVD is coupled to the LVR, instead of the SVR, to supply the second supply voltage.

8. The memory sub-system of claim 7 , wherein the memory sub-system is a solid-state drive (SSD).

9. The memory sub-system of claim 7 , further comprising a monitoring unit configured to determine whether the memory sub-system is in a low power mode or a normal power mode.

10. The memory sub-system of claim 7 , wherein the controller is further configured, responsive to a determination that the memory sub-system is in a low power mode, rather than a normal power mode, to decouple the CVD from the SVR and couple the CVD to the LVR.

11. The memory sub-system of claim 7 , wherein the controller is further configured, responsive to a determination that the memory sub-system is in a normal power mode, rather than a low power mode, to decouple the CVD from the LVR and couple the CVD to the SVR.

12. The memory sub-system of claim 7 , wherein the LVR is configured to reduce the second supply voltage to a third supply voltage compatible with operation of a memory component of the memory sub-system.

13. The memory sub-system of claim 7 , wherein the LVR is a low dropout (LDO) regulator.

14. The memory sub-system of claim 7 , wherein the SVR is selected from a buck regulator and a buck/boost regulator.

15. A memory sub-system, comprising:

a primary power supply (PPS) selectably coupled to one of a linear voltage regulator (LVR) and a switching voltage regulator (SVR); and

a controller coupled to the LVR and the SVR, wherein the controller is configured, responsive to a determination that the memory sub-system receives an input voltage in a particular range from the PPS as a first supply voltage, to direct that:

the LVR reduces the input voltage to a second supply voltage compatible with operation of a capacitive voltage divider (CVD); and

the LVR is coupled to the CVD, instead of the SVR, to supply the second supply voltage.

16. The memory sub-system of claim 15 , wherein the second supply voltage compatible with operation of the CVD is a particular voltage that is divisible by the CVD to produce a third supply voltage compatible with operation of a particular memory component of the memory sub-system.

17. The memory sub-system of claim 15 , wherein the controller is further configured, responsive to a determination that the memory sub-system is in a low power mode, rather than a normal power mode, to decouple the SVR from the PPS and couple the LVR to the PPS to receive the input voltage.

18. The memory sub-system of claim 15 , wherein the controller is further configured, responsive to a determination that the memory sub-system is in a normal power mode, rather than a low power mode, to decouple the LVR from the PPS and couple the SVR to the PPS to receive the input voltage.

19. The memory sub-system of claim 15 , wherein:

the LVR is a low dropout (LDO) regulator configured to reduce the first supply voltage to a second supply voltage compatible with operation of the CVD; and

the CVD is configured to reduce the second supply voltage to a third supply voltage compatible with operation of a memory component of the memory sub-system.

20. The memory sub-system of claim 15 , wherein the input voltage in the particular range corresponds to the memory sub-system being in either a standby mode, a slumber mode, or a sleep mode in which a lower input voltage is supplied relative to a mode that operates at a higher input voltage.

21. The memory sub-system of claim 15 , wherein the higher input voltage is 12 volts (V) or higher and the lower input voltage is in a range of from 2V-5V.