diff --git a/library/dc-dc.dcm b/library/dc-dc.dcm
index c469264a..459e8fba 100644
--- a/library/dc-dc.dcm
+++ b/library/dc-dc.dcm
@@ -196,6 +196,12 @@ K Adjustable 3A 52KHz Buck DC/DC
 F http://www.dianyuan.com/bbs/u/54/437861181916300.pdf
 $ENDCMP
 #
+$CMP ISL8117
+D Synchronous step-down PWM controller, 4.5v to 60v input, 0.6v to 54v output
+K PWM step down buck converter controller synchronous POL
+F https://www.intersil.com/content/dam/Intersil/documents/isl8/isl8117.pdf
+$ENDCMP
+#
 $CMP LM2574HVH-12
 D LM2574N, 12V, 0.5A Step-Down VR, High Votage Input
 K SIMPLE SWITCHER® Step-Down Voltage Regulator 12V 500mA HV
diff --git a/library/dc-dc.lib b/library/dc-dc.lib
index c3d87379..3a64c689 100644
--- a/library/dc-dc.lib
+++ b/library/dc-dc.lib
@@ -255,6 +255,35 @@ X ~ON~/OFF 5 -500 -100 100 R 50 50 1 1 I
 ENDDRAW
 ENDDEF
 #
+# ISL8117
+#
+DEF ISL8117 U 0 40 Y Y 1 F N
+F0 "U" -500 550 50 H V L CNN
+F1 "ISL8117" 500 550 50 H V R CNN
+F2 "" -600 450 50 H V C CNN
+F3 "" -500 550 50 H V C CNN
+DRAW
+S -500 500 500 -500 0 1 10 f
+X EXTBIAS 1 -200 -600 100 U 50 50 1 1 I
+X EN 2 -600 300 100 R 50 50 1 1 I
+X CLKOUT 3 -600 0 100 R 50 50 1 1 I
+X MOD/SYNC 4 -600 200 100 R 50 50 1 1 I
+X PGOOD 5 -600 100 100 R 50 50 1 1 I
+X RT 6 -600 -200 100 R 50 50 1 1 I
+X SS/TRK 7 -600 -100 100 R 50 50 1 1 I
+X FB 8 600 -300 100 L 50 50 1 1 I
+X PGND 9 100 -600 100 U 50 50 1 1 W
+X LGATE/OCS 10 600 -100 100 L 50 50 1 1 I
+X VCC5V 11 0 600 100 D 50 50 1 1 W
+X ISEN 12 600 0 100 L 50 50 1 1 I
+X PHASE 13 600 100 100 L 50 50 1 1 I
+X UGATE 14 600 200 100 L 50 50 1 1 O
+X BOOT 15 600 300 100 L 50 50 1 1 I
+X VIN 16 100 600 100 D 50 50 1 1 W
+X SGND 17 0 -600 100 U 50 50 1 1 W
+ENDDRAW
+ENDDEF
+#
 # LM2574HVH-12
 #
 DEF LM2574HVH-12 U 0 40 Y Y 1 F N