diff --git a/subsys/bluetooth/controller/Kconfig b/subsys/bluetooth/controller/Kconfig
index a8cad31c40d..db1401e585e 100644
--- a/subsys/bluetooth/controller/Kconfig
+++ b/subsys/bluetooth/controller/Kconfig
@@ -284,8 +284,16 @@ config BLUETOOTH_CONTROLLER_SCHED_ADVANCED
 	  Disabling this feature will lead to overlapping role in timespace
 	  leading to skipped events amongst active roles.
 
+config BLUETOOTH_CONTROLLER_RADIO_ENABLE_FAST
+	bool "Use tTXEN/RXEN,FAST ramp-up"
+	depends on SOC_SERIES_NRF52X
+	default y if SOC_NRF52840
+	help
+	  Enable use of fast radio ramp-up mode.
+
 config BLUETOOTH_CONTROLLER_TIFS_HW
 	bool "H/w Accelerated tIFS Trx switching"
+	depends on !BLUETOOTH_CONTROLLER_RADIO_ENABLE_FAST
 	default y
 	help
 	  Enable use of hardware accelerated tIFS Trx switching.
diff --git a/subsys/bluetooth/controller/hal/nrf5/radio.c b/subsys/bluetooth/controller/hal/nrf5/radio.c
index 116e456ba53..4489ef195e5 100644
--- a/subsys/bluetooth/controller/hal/nrf5/radio.c
+++ b/subsys/bluetooth/controller/hal/nrf5/radio.c
@@ -93,6 +93,12 @@ void radio_phy_set(u8_t phy, u8_t flags)
 	}
 
 	NRF_RADIO->MODE = (mode << RADIO_MODE_MODE_Pos) & RADIO_MODE_MODE_Msk;
+
+#if defined(CONFIG_BLUETOOTH_CONTROLLER_RADIO_ENABLE_FAST)
+	NRF_RADIO->MODECNF0 |= (RADIO_MODECNF0_RU_Fast <<
+				RADIO_MODECNF0_RU_Pos) &
+			       RADIO_MODECNF0_RU_Msk;
+#endif /* CONFIG_BLUETOOTH_CONTROLLER_RADIO_ENABLE_FAST */
 }
 
 void radio_tx_power_set(u32_t power)
@@ -211,7 +217,9 @@ u32_t radio_tx_ready_delay_get(u8_t phy, u8_t flags)
 #if defined(CONFIG_SOC_SERIES_NRF51X)
 	return 140;
 #elif defined(CONFIG_SOC_SERIES_NRF52X)
-#if defined(CONFIG_SOC_NRF52840)
+#if defined(CONFIG_BLUETOOTH_CONTROLLER_RADIO_ENABLE_FAST)
+	return 40;
+#elif defined(CONFIG_SOC_NRF52840)
 	switch (phy) {
 	default:
 #if defined(CONFIG_BLUETOOTH_CONTROLLER_TIFS_HW)
@@ -272,7 +280,9 @@ u32_t radio_rx_ready_delay_get(u8_t phy)
 #if defined(CONFIG_SOC_SERIES_NRF51X)
 	return 138;
 #elif defined(CONFIG_SOC_SERIES_NRF52X)
-#if defined(CONFIG_SOC_NRF52840)
+#if defined(CONFIG_BLUETOOTH_CONTROLLER_RADIO_ENABLE_FAST)
+	return 40;
+#elif defined(CONFIG_SOC_NRF52840)
 	switch (phy) {
 	default:
 #if defined(CONFIG_BLUETOOTH_CONTROLLER_TIFS_HW)
diff --git a/tests/bluetooth/init/prj_controller_4_0.conf b/tests/bluetooth/init/prj_controller_4_0.conf
index abe98159765..248bdad77f3 100644
--- a/tests/bluetooth/init/prj_controller_4_0.conf
+++ b/tests/bluetooth/init/prj_controller_4_0.conf
@@ -12,6 +12,7 @@ CONFIG_BLUETOOTH_CONTROLLER_PHY=n
 CONFIG_BLUETOOTH_CONTROLLER_CHAN_SEL_2=n
 CONFIG_BLUETOOTH_CONTROLLER_ADV_EXT=n
 CONFIG_BLUETOOTH_CONTROLLER_TIFS_HW=y
+CONFIG_BLUETOOTH_CONTROLLER_RADIO_ENABLE_FAST=n
 CONFIG_BLUETOOTH_CONTROLLER_FAST_ENC=n
 CONFIG_BLUETOOTH_CONTROLLER_CONN_RSSI=n
 CONFIG_BLUETOOTH_CONTROLLER_ADV_INDICATION=n
diff --git a/tests/bluetooth/init/prj_controller_dbg.conf b/tests/bluetooth/init/prj_controller_dbg.conf
index 416c2d711a9..4ab31884d0c 100644
--- a/tests/bluetooth/init/prj_controller_dbg.conf
+++ b/tests/bluetooth/init/prj_controller_dbg.conf
@@ -15,6 +15,7 @@ CONFIG_BLUETOOTH_CONTROLLER_PHY_CODED=y
 CONFIG_BLUETOOTH_CONTROLLER_CHAN_SEL_2=y
 CONFIG_BLUETOOTH_CONTROLLER_ADV_EXT=y
 CONFIG_BLUETOOTH_CONTROLLER_TIFS_HW=n
+CONFIG_BLUETOOTH_CONTROLLER_RADIO_ENABLE_FAST=y
 CONFIG_BLUETOOTH_CONTROLLER_FAST_ENC=y
 CONFIG_BLUETOOTH_CONTROLLER_CONN_RSSI=y
 CONFIG_BLUETOOTH_CONTROLLER_ADV_INDICATION=y
diff --git a/tests/bluetooth/init/prj_controller_tiny.conf b/tests/bluetooth/init/prj_controller_tiny.conf
index ad6352aaba2..a77a247af2a 100644
--- a/tests/bluetooth/init/prj_controller_tiny.conf
+++ b/tests/bluetooth/init/prj_controller_tiny.conf
@@ -12,6 +12,7 @@ CONFIG_BLUETOOTH_CONTROLLER_PHY=n
 CONFIG_BLUETOOTH_CONTROLLER_CHAN_SEL_2=n
 CONFIG_BLUETOOTH_CONTROLLER_ADV_EXT=n
 CONFIG_BLUETOOTH_CONTROLLER_TIFS_HW=y
+CONFIG_BLUETOOTH_CONTROLLER_RADIO_ENABLE_FAST=n
 CONFIG_BLUETOOTH_CONTROLLER_FAST_ENC=n
 CONFIG_BLUETOOTH_CONTROLLER_CONN_RSSI=n
 CONFIG_BLUETOOTH_CONTROLLER_ADV_INDICATION=n