| Part No.： | LTC3351 |
| Page： | 56 Pages |
| Size： | 1770 KB |
| Manufacturer： | Linear Technology |
| Logo： |  |
| Views： | 2 |
| Update Time： | 2024-04-22 13:55:49 |
| DataSheet： | Download |
| Part No. | Packing | SPQ | Marking | MSL | Pins | Temp Range | Package Description | Buy |
| LTC3351EUFF#PBF | Tube | 52 | 3351 | 1 | 44 | -40°C ~125°C | 44-Lead (4mm × 7mm) Plastic QFN | |
| LTC3351EUFF#TRPBF | Reel | 2000 | 3351 | 1 | 44 | -40°C ~125°C | 44-Lead (4mm × 7mm) Plastic QFN | |
| LTC3351EUFF#TRMPBF | Reel | 500 | 3351 | 1 | 44 | -40°C ~125°C | 44-Lead (4mm × 7mm) Plastic QFN | |
| LTC3351IUFF#PBF | Tube | 52 | 3351 | 1 | 44 | -40°C ~125°C | 44-Lead (4mm × 7mm) Plastic QFN | |
| LTC3351IUFF#TRPBF | Reel | 2000 | 3351 | 1 | 44 | -40°C ~125°C | 44-Lead (4mm × 7mm) Plastic QFN | |
| LTC3351IUFF#TRMPBF | Reel | 500 | 3351 | 1 | 44 | -40°C ~125°C | 44-Lead (4mm × 7mm) Plastic QFN |
The LTC3351 is a backup power controller that charges and monitors a series stack of one to four supercapacitors. The LTC3351’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 runs 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 LTC3351 monitors system voltages, currents, stack capacitance and ESR which can all be read over the I2C/SMBus port. The hot swap controller uses N-channel MOSFETs for inrush control and a low loss path from the input to the output. The ideal diode controller uses an N-channel MOSFET for a low loss power path from the supercapacitors to the output. The LTC3351 is available in a thermally enhanced low profile 44-lead 4mm × 7mm × 0.75mm QFN surface mount package.
