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Buck Converter - 6-20V to 5V/3A
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Price: $21.56
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Sparkfun Item #: COM-18375 -

This is a high grade DC Buck converter that inputs 6 to 12V and outputs 5V up to 3A or 15W. With good thermal performance and protection, this DC block is perfect for battery applications (such as SLAs or LFPs) that need to power a USB or 5V device even while the input is varying (battery charge/discharge). 89% efficiency makes this a high-efficiency, plug and play, DC Step Down solution. Features: Input Voltage: 6 to 20VDC Input Current: 3ADC max Quiescent Current: 12.5mA Efficiency:...

Buck/Boost Converter - 8-40V to 12V/3A
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Price: $32.39
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Sparkfun Item #: COM-18376 -

This is an industrial grade DC Buck-Boost converter that inputs 8V to 40V and outputs 12V up to 3A or 36W. With tons of heatsinking and protection, this DC block is perfect for battery applications (such as SLAs or LFPs) that need to power a steady load (such as 12V router and WiFi equipment) even while the input is varying (battery charge/discharge). 85% efficiency makes this a good, plug and play, DC Step-Up/Down solution. Features: Input Voltage: 8 to 40VDC Input Current: 1 to...