STM32WBA62CGF6 datasheet(30/185 Pages) STMICROELECTRONICS

30 / 185 page

Functional overview

STM32WBA6xxx

30/185

DS14736 Rev 1

An external power supply for the 2.4 GHz RADIO, can be connected to VDD11.

The VDDANA supply must be equal or lower than VDDRF.

•

VDDRFPA = 0 to 3.6 V (must be ≥ 1.2 V for 2.4 GHz RADIO operation)

An external power supply for the 2.4 GHz RADIO and power amplifier regulator, can be

connected to VDD11. The maximum reachable transmit output power is determined by

VDDRFPA supply level. The VDDRFPA supply must be equal or lower than VDDRF.

The devices embed two regulators: one LDO and one SMPS in parallel to provide the

VCORE supply for digital peripherals, SRAM1, SRAM2, 2.4 GHz RADIO and embedded flash

memory. The LDO generates this voltage on VCAP pin connected to a 4.7 μF (typical)

external capacitor. The SMPS generates this voltage on VDD11 pin, with a total a 4.7 μF

(typical) external capacitor. The SMPS requires an external 2.2 μH (typical) coil.

Both regulators can provide two different voltages (voltage scaling), and can operate in Stop

modes.

It is possible to switch from SMPS to LDO and from LDO to SMPS on-the-fly.

Figure 3. Power supply overview (with SMPS)

MSv56534V1

Core

SRAM1

SRAM2

Digital

peripherals

Standby circuitry

Wake-up logic, IWDG

VDDA domain

Backup domain

LDO regulator

I/O ring

VCORE domain

Reset block

Temperature sensor

PLL, internal oscillators

Flash memory

VDDA

VSSA

(3)

VDD domain

VCORE

VSS

(Exposed pad)

(1)

VDD

VDD11

Voltage regulator

VLXSMPS

VDDSMPS

VSSSMPS

VDDRF

VDDRFPA

RADIO domain

VDDANA

VDDHPA

VSSRF

(3)

2.4 GHz RADIO

(1) Exposed pad is available only on QFN packages.

(2) Not available on all packages.

(3) Not available on all packages (when not available connected to VSS pin).

(4) Not available on all packages (when not available connected to VDDA pin).

VREF+

(4)

VSS

SMPS regulator

LSE crystal 32 kHz oscillator

RTC, TAMP, Backup

registers, RCC_BDCR1

ADC

Comparators

Voltage reference buffer

USB OTG

VDDUSB

(2)

VDDIO2

(2)

I/O2 ring

STM32WBA62CGF6 Datasheet(PDF) 30 Page - STMicroelectronics

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