LTC3225EDDB-1#TRMPBF

LTC3225-1 is a programmable supercapacitor charger. Automatic cell balancing prevents overvoltage damage to either supercapacitor. No balancing resistors are required. Low input noise, low quiescent current and low external parts count (one flying capacitor, one bypass capacitor at VIN and one programming resistor) make the device ideally suited for small battery-powered applications. Charge current level is programmed with an external resistor. When the input supply is removed, this device automatically enter a low current state, drawing less than 1μA from the supercapacitors. It is widely used in application such as current limited applications with high peak power loads (LED flash, PCMCIA Tx bursts, HDD bursts, GPRS/GSM transmitter), backup supplies etc.

• Low noise constant frequency charging of two series supercapacitors
• Programmable charge current upto 150mA
• Selectable 2V or 2.25V regulation per cell
• Automatic recharge
• No load operating current at VIN is 20μA typical
• Shutdown current is 1μA maximum
• Operating temperature is -40°C to 85°C
• Package style is 10-lead plastic DFN

Ghi chú

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