1A, Low Noise Synchronous Buck-Boost DC/DC Converter Offers Extended Battery Run Time for Li-Ion And Alkaline-Powered Devices

摘要

Linear Technology has introduced the LTC3536, a synchronous buck-boost converter that delivers up to 1 A of output current from a Li-Ion/Polymer source or 300 mA from dual cell alkaline/NiCD/NiMH sources. Its 1.8 V to 5.5 V input and output voltage range achieves a ±1 percent accurate output with inputs above, below or equal to the regulated output. The latest generation single inductor buck-boost pulse width modulation (PWM) topology incorporated in the LTC3536 provides a continuous transition through all of the operating modes, making it well suited for noise-sensitive applications that must maintain a constant output voltage even as the battery voltage declines below the output.