LTC3255HDD#PBF

LINEAR TECHNOLOGY  LTC3255HDD#PBF  芯片, 降压电荷泵, 500KHZ, DFN-10

The is a switched-capacitor step-down DC/DC charge-pump Converter that produces a regulated output from a 4 to 48V input. In applications where the input voltage exceeds twice the output voltage, 2:1 capacitive charge-pumping extends output current capability beyond input supply current limits. At no load, Burst Mode® operation cuts VIN quiescent current to 16µA. With its integrated VIN shunt regulator, the LTC3255 excels in 4 to 20mA current loop applications. The device enables current multiplication of 4mA input current can power a 7.4mA load continuously. Alternatively, the LTC3255 serves as a higher efficiency replacement for linear regulators and provides a space-saving inductor-free alternative to buck DC/DC converter. The LTC3255 withstands reverse-polarity input supplies and output short-circuits without damage. Safety features including current limit and over temperature protection further enhance robustness.

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Multimode charge pump with automatic mode switching maintains regulation over wide VIN range

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Input voltage shunt mode for current-fed

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Power good output

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Over temperature and short-circuit protection

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-52 to 60V Input fault protection

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16µA Quiescent current in regulation at no load