diff --git a/vreg/buck_tx4137.yaml b/vreg/buck_tx4137.yaml
new file mode 100644
index 0000000..a58f039
--- /dev/null
+++ b/vreg/buck_tx4137.yaml
@@ -0,0 +1,36 @@
+name: TX4137
+description: step-down buck converter
+datasheet: 
+distributors: LCSC C691124
+
+pinout:
+  NC: 1
+  GND: 2
+  FB: 3
+  EN: 4
+  IN: 5
+  SW: 6
+
+properties:
+  power: IN
+  out: SW
+  ground: GND
+  in: EN, FB
+  nc: NC
+
+schematic:
+  symbol: IC
+  left: IN, EN
+  right: SW, FB
+  bottom: GND
+
+housing:
+  pattern: SOT23
+  bodyWidth: 1.6-1.7 # B
+  bodyLength: 2.82-3.02 # A
+  leadSpan: 2.65-2.95 # B1
+  leadWidth: 0.3-0.5 # A2
+  leadLength: 0.3-0.6 # D
+  height: 0.7-0.8 # C
+  pitch: 0.95 # A1
+  leadCount: 6