Features and Benefits
- Dual Input, Single Output DC/DCs with Input Prioritizer
- Energy Harvesting Input: 3.0V to 19V Buck DC/DC
- Primary Cell Input: 1.8V to 5.5V Buck-Boost DC/DC
- Zero Battery IQ When Energy Harvesting Source is Available
- Ultralow Quiescent Current: 750nA at No-Load
- Low Noise LDO Post Regulator
- Integrated Supercapacitor Balancer
- Up to 50mA of Output Current
- Programmable DC/DC and LDO Output Voltages, 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 LTC3330 integrates a high voltage energy harvesting power supply plus a DC/DC converter powered by a primary cell battery to create a single output supply for alternative energy applications. The energy harvesting power supply, consisting of an integrated full-wave bridge rectifier and a high voltage buck converter, harvests energy from piezoelectric, solar, or magnetic sources. The primary cell input powers a buck-boost converter capable of operation down to 1.8V at its input. 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 essentially zero, thereby extending the life of the battery. The buck-boost powers VOUT only when harvested energy goes away.
A low noise LDO post regulator and a supercapacitor balancer are also integrated, accommodating a wide range of output storage configurations. Voltage and current settings for both inputs and outputs are programmable via pin-strapped logic inputs. The LTC3330 is available in a 5mm × 5mm QFN-32 package.
- Energy Harvesting
- Solar Powered Systems with Primary Cell Backup
- Wireless HVAC Sensors and Security Devices
- Mobile Asset Tracking
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (3)
Demonstration circuit 2321A is a low power wireless sensor node development platform equipped with an E-ink display for user feedback. The system is capable of monitoring and managing its available energy, logging information from sensors and sharing this data over a wireless network.
The board is designed to connect to the DC2344A or DC2509A energy harvesting demonstration boards which output a regulated power supply as well as status information from energy harvesting ICs and their backup batteries. Two coulomb counters on the DC2321A allow the processor to monitor the energy output of these batteries which will vary depending on the amount of energy which can be harvested from the system’s surroundings.
A DC2274A-A SmartMesh Manager must be used in order to evaluate the networking features of the DC2321A.
The DC2126A is a high-accuracy wireless temperature sensor, powered from ambient light, built using ADI integrated circuits. A 24-bit delta-sigma ADC reads a thermistor biased from a precision voltage reference. A switching power supply harvests energy from the built-in solar panel, and automatically switches over to the internal battery when no ambient light is available.
At the core of the DC2126A is the LTP5901-IPM, SmartMesh IP wireless mote (node), which provides the ultra-low power wireless mesh connectivity with >99.999% data reliability and communicates the temperature to a central access point (manager). The LTP5901-IPM has on board an ARM Cortex-M3 processor, which can be loaded with user-developed application code using the SmartMesh IP On-Chip Software Development Kit (On-Chip SDK). In the DC2126A, custom application code controls the duty cycling of the voltage reference, samples readings from the ADC and sends the data packet through the SmartMesh IP network, as detailed in this LT Journal article.
|LTC Part Number||Function||Benefits|
|LTC2484||24-bit delta-sigma ADC, reads thermistor||Easy-Drive inputs allow direct hook-up of thermistor|
|LT6654||Low Noise Voltage Reference||Bias thermistor for low noise reading of temperature|
|LTP5901-IPM||SmartMesh IP Mote PCB Module||Automatically forms low power, reliable wireless mesh network.Built-in microprocessor manages ADC and power supplies|
|LTC3330||Energy Harvesting DC/DC Converter||Prioritizes between solar power and battery power|
The DC2126A can be easily added to the DC9000B SmartMesh IP Starter Kit, or any SmartMesh IP network. Temperature readings are sent through the mesh network to a demonstration PC software GUI that displays temperature, and whether the DC2126A is running on solar power or on battery.
DC2126A Demo Manual - step by step instructions to operate the DC2126A
DC2126A Circuit Description (from LT Journal, July 2014) - describes theory of operation of the DC2126A circuit
SmartMesh IP Starter Kits - other SmartMesh IP demo boards
SmartMesh IP On-Chip Software Development Kit - Enables users to develop application code to run on a SmartMesh IP Mote
|Software Name||Software Description||Weblink|
|"DC2126A.exe"||Demonstration GUI software that displays temperature and power source data sent wirelessly through the mesh. Runs on the user's Windows PC connected to a SmartMesh IP network manager.||Part of the SmartMesh IP SDK|
|FTDI Driver||USB-to-Serial drivers for communication with a SmartMesh IP manager (e.g. DC9001B SmartMesh IP Evaluation manager)||Download VCP from ftdichip.com|
Demonstration Circuit 2048A is a nanopower buckboost DC/DC with energy harvesting battery life extender featuring the LTC3330. The LTC3330 integrates a high voltage energy harvesting power supply plus a DC/DC converter powered by a primary cell battery to create a single output supply for alternative energy applications. The energy harvesting power supply, consisting of an integrated low-loss full-wave bridge with a high voltage buck converter, harvests energy from piezoelectric, solar or magnetic sources. The primary cell input powers a buck-boost converter capable of operating down to 1.8V at its input. Either DC/DC converter can deliver energy to a single output.
Tools & Simulations
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.
Models for the following parts are available in LTspice:
Press Releases (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.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.