LTC3226EUD#PBF

LTC3226 is a 2-cell series supercapacitor charger with a backup PowerPath controller. It includes a charge pump supercapacitor charger with programmable output voltage, a low dropout regulator, and a power-fail comparator for switching between normal and backup modes. The constant input current supercapacitor charger is designed to charge two supercapacitors in series to a resistor-programmable output voltage of 2.5V to 5.3V. The internal backup LDO is powered from the supercapacitors and provides upto 2A peak output current with an adjustable output voltage. When the input supply falls below the power-fail threshold, this device automatically enters a backup state in which the supercapacitors power the output through the LDO. It is used in application such as smart power meters, battery-powered industrial/medical equipment, 3.3V solid-state drives, industrial alarms, data backup supplies, battery hold-up supplies etc.

• 1x/2x multimode charge pump supercapacitor charger
• Automatic cell balancing
• Ideal diode main PowerPath™ controller (VIN to VOUT)
• Internal 2A LDO backup supply (CPO to VOUT)
• Automatic main/backup switchover
• Programmable SCAP charge voltage
• Programmable input current limit is 315mA maximum
• Operating junction temperature is -40°C to 125°C
• Package style is 16-lead plastic QFN

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