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2.65V at 1.2A Output Super Cap Charging Circuit from 7.5V to 36V Input 3.3V to 5.5V input (500mA max) charging 4.4mF super cap (3.3V at 800mA) and providing 1.8V at 400mA 6-12Vin to ±5V@50mA Split Supply Automotive 9V - 19.5Vin to 5V at 1A with 60V Transient Protection and 1.7MHz Switching Frequency Buck Regulator with LDO Post Regulation For Low Noise and Ripple Dual Super Cap Charging Circuit from 12V with Balance Voltage Charging Control Circuit Piezoelectric Energy Harvester and 1.2V Secondary Rail Programmable Switching 1.5A Current Source Solar-Powered 2.2V Supply and 1.8V LDO with Li Battery Backup and Run Threshold Set to Battery Minimum Voltage Solar-Powered 2.2V Supply with Li Battery Backup and Run Threshold Set to Battery Minimum Voltage Supercap-Based Power Ride-Through Circuit Maximizes Run Time Using an Energy Scavenging Scheme Supercapacitor Energy Storage System for Data Backup USB-GSM application with 5V USB input (500mA max) charging a 4.4mF super cap (3.4V at 800mA) and providing 1.8V at 400mA
The LTC3388-1/LTC3388-3 are high efficiency step-down DC/DC converters with internal high side and synchronous power switches that draw only 720nA typical DC supply current at no load while maintaining output voltage regulation.The EN pin can be used to activate the LTC3388-1/LTC3388-3. For instance, in this circuit the LTC3388-1 is enabled by the PGOOD output of the LTC3588-1, a piezoelectric energy harvesting power supply, to create a 1.2V rail. The quiescent current that the LTC3388-1 draws will appear at the input of the LTC3588-1, reduced by the conversion ratio of the LTC3588-1 buck converter. Because the LTC3388-1 is driven by a 3.3V supply no capacitors are needed for the internal VIN2 and CAP rails.
