器件名称: LTC3355
功能描述: The LTC®3355 is a complete input power interrupt ridethrough DC/DC system. The part charges a supercapacitor while delivering load current to VOUT, and uses energy from the supercapacitor to provide continuous VOUT backup power when VIN power is lost.
文件大小: 307.99KB 共20页
简 介:LTC3355 20V 1A Buck DC/DC with Integrated SCAP Charger and Backup Regulator FEATURES
VIN Voltage Range: 3V to 20V n V OUT Voltage Range: 2.7V to 5V n1A Current Mode Buck Main Regulator n5A Boost Backup Regulator Powered from Single Supercapacitor n Boost Regulator Operates Down to 0.5V for Maximum Utilization of Supercapacitor Energy n Programmable Supercapacitor Charge Current to 1A with Overvoltage Protection n Charger Supports Single Cell CC/CV Battery Charging n Programmable V Current Limit IN n Programmable Boost Current Limit n V Power Fail Indicator IN n V CAP Power Good Indicator n V OUT Power On Reset Output n Compact 20-Lead 4mm × 4mm QFN Package
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DESCRIPTION
The LTC3355 is a complete input power interrupt ridethrough DC/DC system. The part charges a supercapacitor 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 nonsynchronous constant frequency current mode monolithic 1A buck switching regulator to provide a 2.7V 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 nonsynchronous 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 bo……
