diff --git a/tj-IC.bck b/tj-IC.bck
index 5c5ef5a..f7c56ac 100644
--- a/tj-IC.bck
+++ b/tj-IC.bck
@@ -17,6 +17,12 @@ D RS232 Transceiver This part covers 232 drivers that are compatible with the MA
 K PROD_ID:NA-XXXXX
 $ENDCMP
 #
+$CMP MP2161A
+D 2A, 6V, 1.5MHz, 17μA IQ, COT Synchronous Step-Down Converter in 8-pin TSOT23
+K step-down dc-dc buck regulator
+F https://www.monolithicpower.cn/cn/documentview/productdocument/index/version/2/document_type/Datasheet/lang/EN/sku/MP2161A/document_id/935/
+$ENDCMP
+#
 $CMP SP3232EEY-L_TR
 D True +3.0V to +5.5V RS-232 Transceivers
 K RS232
diff --git a/tj-IC.dcm b/tj-IC.dcm
index 5c5ef5a..ce03a22 100644
--- a/tj-IC.dcm
+++ b/tj-IC.dcm
@@ -17,6 +17,12 @@ D RS232 Transceiver This part covers 232 drivers that are compatible with the MA
 K PROD_ID:NA-XXXXX
 $ENDCMP
 #
+$CMP MP2161AGJ
+D 2A, 6V, 1.5MHz, 17μA IQ, COT Synchronous Step-Down Converter in 8-pin TSOT23
+K step-down dc-dc buck regulator
+F https://www.monolithicpower.cn/cn/documentview/productdocument/index/version/2/document_type/Datasheet/lang/EN/sku/MP2161A/document_id/935/
+$ENDCMP
+#
 $CMP SP3232EEY-L_TR
 D True +3.0V to +5.5V RS-232 Transceivers
 K RS232
diff --git a/tj-IC.lib b/tj-IC.lib
index ba2d6c5..16f2eb2 100644
--- a/tj-IC.lib
+++ b/tj-IC.lib
@@ -1071,6 +1071,29 @@ X PTD6/LLWU_P15/ADC0_SE7b/SPI0_PCS3/UART0_RX/FTM0_CH6/FB_AD0/FTM0_FLT0/SPI1_SOUT
 ENDDRAW
 ENDDEF
 #
+# MP2161AGJ
+#
+DEF MP2161AGJ U 0 10 Y Y 1 F N
+F0 "U" -300 450 50 H V L CNN
+F1 "MP2161AGJ" -50 450 50 H V L CNN
+F2 "Package_TO_SOT_SMD:TSOT-23-8" 150 -350 50 H I L CNN
+F3 "" 0 550 50 H I C CNN
+$FPLIST
+ *TSOT*23*8*
+$ENDFPLIST
+DRAW
+S -300 400 300 -300 0 1 10 f
+X PG 1 -400 -100 100 R 50 50 1 1 C
+X VIN 2 -400 300 100 R 50 50 1 1 W
+X SW 3 400 300 100 L 50 50 1 1 O
+X PGND 4 0 -400 100 U 50 50 1 1 W
+X OUT 5 400 200 100 L 50 50 1 1 I
+X AGND 6 100 -400 100 U 50 50 1 1 W
+X FB 7 400 -100 100 L 50 50 1 1 I
+X EN 8 -400 200 100 R 50 50 1 1 I
+ENDDRAW
+ENDDEF
+#
 # PC357
 #
 DEF PC357 U 0 40 Y N 1 F N