LTC3350 Datasheet
High Current Supercapacitor Backup Controller and System Monitor
High Current Supercapacitor Backup Controller and System Monitor
| Part No. | In Stock | Price | Packaging | SPQ | Marking | MSL | Pins | Temp Range | Package Description |
| LTC3350EUHF#PBF | 0 | $5.796 | Tube | 52 | 3350 | 1 | 38 | -40°C ~ 125°C | 38-Lead QFN |
| LTC3350EUHF#TRPBF | 5000pcs | $5.796 | Reel | 2500 | 3350 | 1 | 38 | -40°C ~ 125°C | 38-Lead QFN |
| LTC3350IUHF#PBF | 0 | $6.372 | Tube | 52 | 3350 | 1 | 38 | -40°C ~ 125°C | 38-Lead QFN |
| LTC3350IUHF#TRPBF | 2500pcs | $6.372 | Reel | 2500 | 3350 | 1 | 38 | -40°C ~ 125°C | 38-Lead QFN |
| LTC3350IUHF#WPBF | 2600pcs | $0 | Tube | 52 | 3350 | 1 | 38 | -40°C ~ 125°C | 38-Lead QFN |
| LTC3350IUHF#WTRPBF | 0 | $0 | Reel | 2500 | 3350 | 1 | 38 | -40°C ~ 125°C | 38-Lead QFN |
The LTC3350 is a backup power controller that can charge and monitor a series stack of one to four supercapacitors. The LTC3350’s synchronous step-down controller drives N‑channel MOSFETs for constant current/constant voltage charging with programmable input current limit. In addition, the step-down converter can run in reverse as a step-up converter to deliver power from the supercapacitor stack to the backup supply rail. Internal balancers eliminate the need for external balance resistors and each capacitor has a shunt regulator for overvoltage protection.
The LTC3350 monitors system voltages, currents, stack capacitance and stack ESR which can all be read over the I2C/SMBus. The dual ideal diode controller uses N-channel MOSFETs for low loss power paths from the input and supercapacitors to the backup system supply. The LTC3350 is available in a low profile 38-lead 5mm × 7mm × 0.75mm QFN surface mount package.