add TX4137 buck regulator
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name: TX4137
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description: step-down buck converter
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datasheet:
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distributors: LCSC C691124
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pinout:
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NC: 1
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GND: 2
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FB: 3
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EN: 4
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IN: 5
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SW: 6
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properties:
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power: IN
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out: SW
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ground: GND
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in: EN, FB
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nc: NC
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schematic:
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symbol: IC
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left: IN, EN
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right: SW, FB
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bottom: GND
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housing:
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pattern: SOT23
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bodyWidth: 1.6-1.7 # B
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bodyLength: 2.82-3.02 # A
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leadSpan: 2.65-2.95 # B1
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leadWidth: 0.3-0.5 # A2
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leadLength: 0.3-0.6 # D
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height: 0.7-0.8 # C
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pitch: 0.95 # A1
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leadCount: 6
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