STM32W108HB datasheet(86/278 Pages) STMICROELECTRONICS

Part #	STM32W108HB

Description	High-performance, IEEE 802.15.4 wireless system-on-chip with up to 256 Kbytes of embedded Flash memory

PDF	278 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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86 / 278 page

Integrated voltage regulator

STM32W108HB STM32W108CC STM32W108CB STM32W108CZ

86/278

Doc ID 16252 Rev 14

An external 1.8 V regulator may replace both internal regulators. The STM32W108 can

control external regulators during deep sleep using open-drain GPIO PA7, as described in

Section 8: General-purpose input/output. The STM32W108 drives PA7 low during deep

sleep to disable the external regulator and an external pull-up is required to release this

signal to indicate that supply voltage should be provided. Current consumption increases

approximately 2 mA when using an external regulator. When using an external regulator the

internal regulators should be disabled through software.

1V8 regulator start-up time

µs

0 V to POR threshold 2.2

µF capacitor

1V25 regulator start-up time

µs

0 V to POR threshold 1.0

µF capacitor

Table 12.

1.8 V integrated voltage regulator specifications (continued)

Parameter

Min.

Typ.

Max.

Units

Comments

STM32W108HB Datasheet(PDF) 86 Page - STMicroelectronics