Part NumberDescriptionStatusChannels(.)Vin (Min)(V)Vin (Max)(V)Vout (Min)(V)Vout (Max)(V)Isw (Peak)(A)Switching Frequency(Max)(kHz)TypeLED Current Per Channel(mA)LED(.)TopologyDuty Cycle(Max)(%)Shutdown Current(Max)(μA)Peak Efficiency(%)Operating Temperature Range(°C)Pin/PackageEV Kit Available?
UM1660DAPFM Mode Step-up DC-DC Converter with 400mA Peak Current LimitACTIVE126 280.41000Inductive208Boost0190-40 to 856/DFN6L 2.0×2.0Y
UM1660SPFM Mode Step-up DC-DC Converter with 400mA Peak Current LimitACTIVE126 280.41000Inductive208Boost0190-40 to 855/SOT23Y
UM1661PFM Mode Step-up DC-DC Converter with 1.6A Peak Current LimitACTIVE426 241.52000Inductive2032Boost0185-40 to 856/SOT23Y
UM1663SPWM Mode Step-up DC-DC Converter with 38V/1.0A MOSFETACTIVE12.85.5 3611000Inductive3010Boost93190-40 to 856/SOT23 
UM1664SStep-up DC-DC Converter with Light Load ModePREVIEW126 320.41000Inductive208Boost0190-40 to 855/SOT23 
UM1666DAPFM Mode Step-up DC-DC Converter with 600mA Peak Current LimitACTIVE1260280.61000Inductive208Boost0190-40 to 856/DFN6L 2.0×2.0Y
UM1666SPFM Mode Step-up DC-DC Converter with 600mA Peak Current LimitACTIVE1260280.61000Inductive208Boost0190-40 to 855/SOT23Y