The converter is used in systems powered from one cell, giving the output voltage from the 1.8V-6V range, set by the user. The quiescent current at the level of 5.5uA allows for a long operation of the device with battery power supply.
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LM3668SD-4550/NOPB, 1-A, High-Efficiency Dual-Mode Single-Inductor Buck-Boost DC-DC Converter, WSON-12
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Synchronous buck converter, 1.2A, 1.5MHz, Vin max = 7V, RoHS
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Step-UP converter (increasing the voltage), allows you to start with a load at a supply voltage of 0.7V, while the power consumption at rest is 5.5 uA. TPS61220