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AMS1117 5V to 3.3V Step-Down Regulator Module - ProtoSupplies
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42V Input - 3.3V @ 2A Output High Voltage Step Down Regulator - Electronics-Lab.com
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Pololu 3.3V, 2.6A Step-Down Voltage Regulator D24V22F3
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5V/3.3V Dual Output Micro Power Module (Step-Up/Down) – REVOTICS
3.3V DC-DC Step-Down High-Efficiency Power Module
