diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts
index 4a7043d4450c04..a947f8ea3e4b0f 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts
@@ -490,7 +490,7 @@
 		regulator-name = "vdd_cpu_b";
 		regulator-min-microvolt = <712500>;
 		regulator-max-microvolt = <1500000>;
-		regulator-ramp-delay = <1000>;
+		regulator-ramp-delay = <500>;
 		regulator-always-on;
 		regulator-boot-on;
 		vin-supply = <&vcc_sys>;