added L5973D switching regulator

library/regul.dcm

@@ -864,6 +864,12 @@ K 2A Regulator Adjustable Positive
 F http://www.zen22142.zen.co.uk/Circuits/Power/l200.pdf
 $ENDCMP
 #
+$CMP L5973D
+D 2.5A step down switching regulator
+K step down buck regulator
+F http://www.st.com/resource/en/datasheet/l5973d.pdf
+$ENDCMP
+#
 $CMP LD1117S12CTR
 D 800mA Fixed Low Drop Positive Voltage Regulator, Fixed Output 1.2V, SOT223
 K REGULATOR LDO 1.2V

library/regul.lib

@@ -288,6 +288,30 @@ X VOUT 5 400 200 100 L 50 50 1 1 w
 ENDDRAW
 ENDDEF
 #
+# L5973D
+#
+DEF L5973D U 0 40 Y Y 1 F N
+F0 "U" 0 -100 50 H V C CNN
+F1 "L5973D" 0 100 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ SO8_WITH_EP
+$ENDFPLIST
+DRAW
+S -400 400 400 -400 0 1 0 N
+X OUT 1 500 200 100 L 50 50 1 1 O
+X SYNC 2 -500 200 100 R 50 50 1 1 P
+X INH 3 -500 0 100 R 50 50 1 1 I
+X COMP 4 -500 -200 100 R 50 50 1 1 P
+X FB 5 500 0 100 L 50 50 1 1 I
+X VREF 6 500 -200 100 L 50 50 1 1 O
+X GND 7 -100 -500 100 U 50 50 1 1 P
+X VCC 8 0 500 100 D 50 50 1 1 W
+X EP 9 100 -500 100 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
 # LD1117S33TR
 #
 DEF LD1117S33TR U 0 30 Y Y 1 F N