STM32WB55CC datasheet(24/165 Pages) STMICROELECTRONICS

Nome de Peças	STM32WB55CC

Descrição Electrónicos	Multiprotocol wireless 32-bit MCU Arm

PDF	165 Pages

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Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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24 / 165 page

Functional overview

STM32WB55xx

24/165

DS11929 Rev 3

Figure 3. STM32WB55xx external components for the RF part

3.7

Power supply management

3.7.1

Power supply distribution

The device integrate an SMPS step-down converter to improve low power performance

when the VDD voltage is high enough. This converter has an intelligent mode that

automatically enters in bypass mode when the VDD voltage falls below a specific BORx

(x = 1, 2, 3 or 4) voltage.

By default, at Reset the SMPS is in bypass mode.

The device can be operated without the SMPS by just wiring its output to VDD. This is the

case for applications where the voltage is low, or where the power consumption is not

critical.

Table 5. Typical external components

Component

Description

Value

Decoupling capacitance for RF

100 nf // 100 pF

32 MHz crystal(1)

1. e.g. NDK refernce: NX2016SA 32 MHz EXS00A-CS06654.

32 MHz

Antenna filter

Antenna filter and matching network

Refer to AN5165

Antenna

2.4 GHz band antenna

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