LTC3350
RECOMMENDED FOR NEW DESIGNSHigh Current Supercapacitor Backup Controller and System Monitor
- Part Models
- 6
- 1ku List Price
- Starting From $6.52
Overview
- High Efficiency Synchronous Step-Down CC/CV Charging of One to Four Series Supercapacitors
- Step-Up Mode in Backup Provides Greater Utilization of Stored Energy in Supercapacitors
- 14-Bit ADC for Monitoring System Voltages/Currents, Capacitance and ESR
- Active Overvoltage Protection Shunts
- Internal Active Balancers—No Balance Resistors
- VIN: 4.5V to 35V, VCAP(n): Up to 5V per Capacitor, Charge/Backup Current: 10+A
- Programmable Input Current Limit Prioritizes System Load Over Capacitor Charge Current
- Dual Ideal Diode PowerPath™ Controller
- All N-FET Charger Controller and PowerPath Controller
- Compact 38-Lead 5mm × 7mm QFN Package
- AEC-Q100 Qualified for Automotive Applications
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.
APPLICATIONS
- High Current 12V Ride-Through UPS
- Servers/Mass Storage/High Availability Systems
Documentation
Data Sheet 1
User Guide 1
Technical Articles 2
Product Selector Card 1
Book & eBook 1
Rarely Asked Question 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC3350EUHF#PBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3350EUHF#TRPBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3350IUHF#PBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3350IUHF#TRPBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3350IUHF#WPBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC3350IUHF#WTRPBF | 38-Lead QFN (5mm x 7mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Evaluation Software 1
Can't find the software or driver you need?
Hardware Ecosystem
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC3350
Software and Simulation 1
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
LTC3350EUHF Demo Board | High Current Supercapacitor Backup Controller and System Monitor, up to 20VIN