LTC3331
RECOMMENDED FOR NEW DESIGNSNanopower Buck-Boost DC/DC with Energy Harvesting Battery Charger
- Part Models
- 4
- 1ku List Price
- Starting From $5.38
Overview
- Dual Input, Single Output DC/DCs with Input Prioritizer
- Energy Harvesting Input: 3.0V to 19V Buck DC/DC
- Battery Input: Up to 4.2V Buck-Boost DC/DC
- 10mA Shunt Battery Charger with Programmable Float Voltages: 3.45V, 4.0V, 4.1V, 4.2V
- Low Battery Disconnect
- Ultra Low Quiescent Current: 950nA at no Load
- Integrated Supercapacitor Balancer
- Up to 50mA of Output Current
- Programmable DC/DC Output Voltage, Buck UVLO, and Buck-Boost Peak Input Current
- Integrated Low-Loss Full-Wave Bridge Rectifier
- Input Protective Shunt: Up to 25mA at VIN ≥ 20V
- 5mm × 5mm QFN-32 Package
The LTC3331 integrates a high voltage energy harvesting power supply plus a buck-boost DC/DC powered from a rechargeable battery to create a single output supply for alternative energy applications. A 10mA shunt allows simple charging of the battery with harvested energy while a low battery disconnect function protects the battery from deep discharge. The energy harvesting power supply, consisting of an integrated full-wave bridge rectifier and a high voltage buck DC/DC, harvests energy from piezoelectric, solar, or magnetic sources. Either DC/DC converter can deliver energy to a single output. The buck operates when harvested energy is available, reducing the quiescent current draw on the battery to the 200nA required by the shunt charger, thereby extending the life of the battery. The buck-boost powers VOUT only when harvested energy is unavailable.
A supercapacitor balancer is also integrated, allowing for increased output storage. Voltage and current settings for both inputs and outputs are programmable via pin-strapped logic inputs. The LTC3331 is available in a 5mm × 5mm QFN-32 package.
Applications
- Energy Harvesting
- Solar Powered Systems with Battery Backup
- Wireless HVAC Sensors and Security Devices
- Mobile Asset Tracking
Documentation
Data Sheet 1
User Guide 2
Technical Articles 1
Product Selector Card 2
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 |
|---|---|---|---|
| LTC3331EUH#PBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LTC3331EUH#TRPBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LTC3331IUH#PBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LTC3331IUH#TRPBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jan 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products |
||
| LTC3331EUH#PBF | PRODUCTION | |
| LTC3331EUH#TRPBF | PRODUCTION | |
| LTC3331IUH#PBF | PRODUCTION | |
| LTC3331IUH#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Ideal Diodes and PowerPath Controllers 1 | ||
| LTC4417 | RECOMMENDED FOR NEW DESIGNS | Prioritized PowerPath™ Controller |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC3331
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.
