LTC3355EUF#TRPBF

LTC3355 is a buck DC/DC with integrated SCAP charger and backup regulator. The part charges a super capacitor while delivering load current to VOUT, and uses energy from the super capacitor to provide continuous VOUT backup power when VIN power is lost. This device contains a non-synchronous constant frequency current mode monolithic 1A buck switching regulator to provide a 2.7V to 5V regulated output voltage from an input supply of upto 20V. A 1A programmable CC/CV linear charger charges the supercapacitor from VOUT. When the VIN supply drops below the PFI threshold, the devices' constant frequency nonsynchronous current mode 5A boost switching regulator delivers power from the supercapacitor to VOUT. It is widely used in application such as ride-through “Dying Gasp” supplies, power meters/industrial alarms/solid state drives etc.

• Input voltage range is 3V to 20V
• Boost regulator operates down to 0.5V for maximum utilization of supercapacitor energy
• Programmable supercapacitor charge current to 1A with overvoltage protection
• Programmable VIN current limit
• Programmable boost current limit
• VIN power fail indicator
• VCAP power good indicator
• VOUT power on reset output
• Operating temperature is -40°C to 125°C
• Package style is 20-lead plastic QFN

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party