LTC7813IUH#PBF

LINEAR TECHNOLOGY  LTC7813IUH#PBF  芯片, 直流/直流控制器, 850KHZ, QFN-32 新

The is a low IQ, 60V synchronous boost + buck controller in 32 pin QFN package. This high performance synchronous controller drives all N-channel power MOSFET stages. It contains independent step-up boost and step-down buck controller that can regulate two separate outputs or be cascaded to regulate an output voltage from an input voltage that can be above, below or equal to the output voltage. When biased from the output of the boost regulator, IC can operate from an input supply as low as 2.2V after start-up. The 34µA no-load quiescent current both channels on extends operating runtime in battery powered systems. Unlike conventional buck-boost regulator IC"s cascaded boost + buck solution has continuous, nonpulsating, input and output currents, substantially reducing voltage ripple and EMI. It has independent feedback and compensation points for the boost and buck regulation loops, enabling a fast output transient response that can be externally optimized.

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Supply voltage range from 4.5V to 60V

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Output remains in regulation through input dips e.g. cold crank down to 2.2V

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Operating temperature range from -40°C to 125°C

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Adjustable gate drive level 5V to 10V opti-drive

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Low EMI with low input and output ripple, high light load efficiency

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Fast output transient response, no external bootstrap diodes required

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Low operating IQ of 29µA one channel on, 34µA both channels on

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RSENSE or lossless DCR current sensing, boost output voltage up 60V

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Buck output voltage range from 0.8V

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Phase lockable frequency 75KHz to 850KHz