LTC3355EUF#PBF

LINEAR TECHNOLOGY  LTC3355EUF#PBF  直流-直流开关降压逐步递减稳压器, 可调, 3V-20V输入, 2.7V-5V输出, 1A输出, QFN-20

The is a complete input power interrupt ride-through DC-to-DC System for use with solid state drives. The part charges a super capacitor while delivering load current to VOUT and uses energy from the supercapacitor to provide continuous VOUT backup power when VIN power is lost. The LTC3355 contains a non-synchronous constant frequency current mode monolithic 1A buck switching regulator to provide a 2.7 to 5V regulated output voltage from an input supply of up to 20V. A 1A programmable CC/CV linear charger charges the supercapacitor from VOUT. When the VIN supply drops below the PFI threshold, the devices"s constant frequency non-synchronous current mode 5A boost switching regulator delivers power from the supercapacitor to VOUT. A thermal regulation loop maximizes charge current while limiting the die temperature to 110°C. The IC has boost, charger and VIN programmable current limits.

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Boost regulator operates down to 0.5V for maximum utilization of supercapacitor energy

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Programmable supercapacitor charge current to 1A with overvoltage protection

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Charger supports single cell CC/CV battery charging

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Programmable VIN current limit

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Programmable boost current limit

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VIN power fail indicator

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VCAP power good indicator

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VOUT power on reset output