AIROC™ Bluetooth® system on chip for automotive applications
Power configurations
5.2
Configuration 2 - External supplies
In this configuration the internal regulators are not used and VBAT is not supplied. VDDIO is supplied along with
externally generated core and radio supplies. This is shown in the following figure.
CYW89820
PALDO_VDDIN
PMU_AVDD
PALDO_VDDOUT
PA LDO
_
SR PVDD
BUCK
SR_VLX
RFLDO_VDDOUT
DIGLDO_VDDOUT
RFLDO_VDDIN
DIGLDO_VDDIN
RF LDO
DIG LDO
VDDC
VDDC
External
VDDIO
RST_N
VDDRF
Radio
IFVDD
VDDIO
PLLVDD
VCOVDD
PAVDD
VDDIO
MICAVD D
AD C_AVDDBAT
VDDPA
Figure 7
External supplies configuration
Note that VDDIO must be provided simultaneously or before the rest of the supplies and the device must be held
in reset until all supplies are within normal operating ranges.
The device may require a reset if any supply goes outside the normal operating range.
5.3
Configuration 3 - LDOs and VDDIO
In this configuration the internal buck regulator is not used. Instead, power is supplied to the internal LDOs which
are responsible for supplying the rest of the device.
CYW89820
PA Supply
PALDO_VDDIN
PA LDO
PALDO_VDDOUT
PMU_AVDD
SR_PVDD
BUCK
SR_VLX
RF Supply
RFLDO_VDDIN
RF LDO
RFLDO_VDDOUT
DIGLDO_VDDOUT
DIGLDO_VDDIN
DIG LDO
DIG Supply
External
VDDC
RST_N
Radio
IFVDD
VDDIO
VDDIO
PLLVDD
VCOVDD
PAVDD
VDDIO
MIC_AVDD
ADC_AVDDBAT
Figure 8
LDOs and VDDIO configuration
Note that VDDIO must be provided simultaneously or before the rest of the supplies and the device must be held
in reset until all supplies are within normal operating ranges. The internal LDOs have a small turn-on time
(specified later in the datasheet) which should be accounted for before releasing reset.
The device may require a reset if any supply goes outside the normal operating range.
Datasheet
15
002-25826 Rev. *G
2022-09-24
INFINEON [ Infineon ]
