User's Manual

UM2819

UM2819 - Rev 1

page 22/37

Embedded SMPS

7.8 Embedded SMPS

NUCLEO-WB55RG embeds an SMPS to optimize the power consumption. All the details of this part are

explained in the datasheet and the reference manual of the NUCLEO-WB55RG. NUCLEO-WB55RG allows the

evaluation of the SoC with this SMPS active. All the components necessary for the operation are present.

Moreover, it is possible to bypass the SMPS. For that, it is first necessary to stop the SMPS by firmware (Refer to

the SMPS section in the datasheet and user manual). And in a second time, it is possible to bypass the SMPS, for

that it is necessary to close SB23.

Figure 15. SMPS part

ST Restricted

STM32WB55RG

VDDSMPS

VLXSMPS

VFBSMPS

Solder

Bridge

4.7uF

10uH

OPEN if SMPS=ON

CLOSE if SMP=OFF

VSSSMPS

10nH

100nF

VDD

SB23

C23

C24

C29