UCC3941-3

www.DataSheet4U.com application INFO available UCC2941-3/-5/-ADJ UCC3941-3/-5/-ADJ 1V Synchronous Boost Converter FEATURES 1V Input Voltage Operation Startup Guaranteed Under Full Load on Main Output With Operation Down to 0.4V Input Voltage Range of 1V to VOUT + 0.5V 500mW Output Power at Battery Voltages as Low as 0.8V Secondary 9V Supply From a Single Inductor DESCRIPTION The UCC3941 family of low input voltage single inductor boost converters are optimized to operate from a single or dual alkaline cell, and step up to a 3.3V, 5V, or an adjustable output at 500mW. The UCC3941 family also provides an auxiliary 9V 100mW output, primarily for the gate drive supply, which can be used for applications requiring an auxiliary output such as a 5V supply by linear regulating. The primary output will start up under full load at input voltages typically as low as 0.8V, with a guaranteed maximum of 1V, and will operate down to 0.4V once the converter is operating, maximizing battery utilization. Demanding applications such as Pagers and PDA’s require high efficiency Adjustable Output Power Limit Control from several milli-watts to several hundred milli-watts, and the UCC3941 family accommodates these applications with >80% typical efficiencies Output Fully Disconnected in over the wide range of operation. The high efficiency at low output current Shutdown is achieved by optimizing switching and conduction losses along with low quiescent current. At higher output c...