SPC560B64X datasheet(79/133 Pages) STMICROELECTRONICS

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DocID15131 Rev 9

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SPC560B54x/6x

Electrical characteristics

132

4.8

Power management electrical characteristics

4.8.1

Voltage regulator electrical characteristics

The device implements an internal voltage regulator to generate the low voltage core supply

VDD_LV from the high voltage ballast supply VDD_BV. The regulator itself is supplied by the

common I/O supply VDD. The following supplies are involved:



HV: High voltage external power supply for voltage regulator module. This must be

provided externally through VDD power pin.



BV: High voltage external power supply for internal ballast module. This must be

provided externally through VDD_BV power pin. Voltage values should be aligned with

VDD.



LV: Low voltage internal power supply for core, FMPLL and Flash digital logic. This is

generated by the internal voltage regulator but provided outside to connect stability

capacitor. It is further split into four main domains to ensure noise isolation between

critical LV modules within the device:

–

LV_COR: Low voltage supply for the core. It is also used to provide supply for

FMPLL through double bonding.

–

LV_CFLA: Low voltage supply for code flash module. It is supplied with dedicated

ballast and shorted to LV_COR through double bonding.

–

LV_DFLA: Low voltage supply for data flash module. It is supplied with dedicated

ballast and shorted to LV_COR through double bonding.

–

LV_PLL: Low voltage supply for FMPLL. It is shorted to LV_COR through double

bonding.

Figure 9. Voltage regulator capacitance connection

DEVICE

VSS_LV

VDD_BV

VDD_LV

VSS_LV

VDD_LV

VDD

VSS_LV

VDD_LV

CREG2 (LV_COR/LV_CFLA)

CREG3

CDEC2

DEVICE

VDD_BV

VDD_LVn

VREF

VDD

Voltage Regulator

VSS

VSS_LVn

(supply/IO decoupling)

(LV_COR/LV_PLL)

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