diff --git a/library/regul.dcm b/library/regul.dcm
index ea53260d..cdbc2678 100644
--- a/library/regul.dcm
+++ b/library/regul.dcm
@@ -3528,6 +3528,12 @@ K linear low dropout Regulator fixed ultra-low-noise
 F http://ww1.microchip.com/downloads/en/devicedoc/mic5219.pdf
 $ENDCMP
 #
+$CMP MIC5504-3.3YM5
+D LDO 3.3V, input 2.5V to 5.5V SOT-23
+K Low power and low drop output voltage regulator
+F http://ww1.microchip.com/downloads/en/devicedoc/mic550x.pdf
+$ENDCMP
+#
 $CMP NCP1117-1.5_SOT223
 D 1A Low drop-out regulator, Fixed Output 1.5V, SOT-223
 K REGULATOR LDO 1.5V
diff --git a/library/regul.lib b/library/regul.lib
index 3b70d1c5..f742c276 100644
--- a/library/regul.lib
+++ b/library/regul.lib
@@ -2061,6 +2061,27 @@ X OUT 5 300 100 100 L 50 50 1 1 w
 ENDDRAW
 ENDDEF
 #
+# MIC5504-3.3YM5
+#
+DEF MIC5504-3.3YM5 U 0 40 Y Y 1 F N
+F0 "U" -250 250 60 H V C CNN
+F1 "MIC5504-3.3YM5" 400 250 60 H V C CNN
+F2 "" 500 300 60 H I C CNN
+F3 "" 0 200 60 H I C CNN
+ALIAS MIC5504-2.8YM5 MIC5504-2.5YM5 MIC5504-1.8YM5 MIC5504-1.2YM5
+$FPLIST
+ SOT-23-5*
+$ENDFPLIST
+DRAW
+S -300 -200 300 200 0 1 0 f
+X VIN 1 -400 100 100 R 50 50 1 1 W
+X GND 2 0 -300 100 U 50 50 1 1 W
+X EN 3 -400 0 100 R 50 50 1 1 I
+X NC 4 400 0 100 L 50 50 1 1 N N
+X VOUT 5 400 100 100 L 50 50 1 1 w
+ENDDRAW
+ENDDEF
+#
 # NCP1117-12_TO252
 #
 DEF NCP1117-12_TO252 U 0 10 Y Y 1 F N