52.2.2 Power Supply Connections

The following figures shows the recommended power supply connections for Switched/Linear mode and Linear mode only.

Figure 52-1. Power Supply Connection for Switching/Linear Mode
Figure 52-2. Power Supply Connection for Linear Mode Only
Table 52-1. Power Supply Connections (1,2)
Signal NameAssociated Ground

Recommended Pin Connection

VDDVSSCapacitors: refer to REG_5
AVDDAVSSCapacitors: refer to REG_17

Ferrite bead(3): refer to REG_23/REG_25

VDDCOREVSSCORECapacitors: refer to REG_1
VDDPLLAVSSPLLCapacitors: refer to REG_3
VDDOUT-BUCK mode: Inductor required to VDDCORE: refer to REG_27/REG_29/REG_31
LDO mode: Not Connected
Note:
  1. REG_X values: Refer to Power Supply Electrical Specifications from the Electrical Characteristics chapter.
  2. Decoupling capacitors must be placed close to the device, low ESR capacitors must be used for better decoupling.
  3. A ferrite bead must be added between VDD and AVDD to attenuate high-frequency digital noise from entering the analog power domain. The bead must provide enough impedance to help isolate digital and analog power domains. Make sure to select a ferrite bead with a low DC resistance to avoid any relevant IR drop across the ferrite bead that could impact analog peripherals performance.