diff --git a/arch/arm/src/stm32h7/Kconfig b/arch/arm/src/stm32h7/Kconfig
index 91c66280aa..15ba5312c5 100644
--- a/arch/arm/src/stm32h7/Kconfig
+++ b/arch/arm/src/stm32h7/Kconfig
@@ -293,6 +293,12 @@ config STM32H7_PWR_DIRECT_SMPS_SUPPLY
 	depends on STM32H7_HAVE_SMPS
 	default n
 
+config STM32H7_PWR_EXTERNAL_SOURCE_SUPPLY
+	bool "Use external source as power supply"
+	default n
+	---help---
+		Select this option for using an external power supply connected directly to the VCAP pin.
+
 choice
 	prompt "STM32 H7 Power Supply Selection"
 	default STM32H7_PWR_DEFAULT_SUPPLY
diff --git a/arch/arm/src/stm32h7/stm32h7x3xx_rcc.c b/arch/arm/src/stm32h7/stm32h7x3xx_rcc.c
index da7af1f59c..51031027ae 100644
--- a/arch/arm/src/stm32h7/stm32h7x3xx_rcc.c
+++ b/arch/arm/src/stm32h7/stm32h7x3xx_rcc.c
@@ -148,12 +148,18 @@
 
 #  if defined(CONFIG_STM32H7_PWR_DIRECT_SMPS_SUPPLY)
 #    define STM32_PWR_CR3_SELECTION STM32_PWR_CR3_SDEN
+#  elif defined(CONFIG_STM32H7_PWR_EXTERNAL_SOURCE_SUPPLY)
+#    define STM32_PWR_CR3_SELECTION STM32_PWR_CR3_BYPASS
 #  else
 #    define STM32_PWR_CR3_SELECTION STM32_PWR_CR3_LDOEN
 #  endif
 #else
 #  define STM32_PWR_CR3_MASK  0xffffffff
-#  define STM32_PWR_CR3_SELECTION (STM32_PWR_CR3_LDOEN | STM32_PWR_CR3_SCUEN)
+#  if defined(CONFIG_STM32H7_PWR_EXTERNAL_SOURCE_SUPPLY)
+#    define STM32_PWR_CR3_SELECTION (STM32_PWR_CR3_BYPASS | STM32_PWR_CR3_SCUEN)
+#  else
+#    define STM32_PWR_CR3_SELECTION (STM32_PWR_CR3_LDOEN | STM32_PWR_CR3_SCUEN)
+#  endif
 
 #endif