RT9901 ic equivalent, 4 channel dc/dc converters ic.
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1.5V to 5.5V Battery Input Voltage Range Main step-up DC-DC Converter `1.5V to 5.5V Adjustable Output Voltage `Up to 90% Efficiency `2.6A, .
www.DataSheet4U.com that use either two or three AA cells or a single lithiumion battery. The main step-up DC-DC convert.
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