• 简体中文
• English

LTC3588-2 - Nanopower Energy Harvesting Power Supply with 14V Minimum VIN

The LTC®3588-2 integrates a low-loss full-wave bridge rectifier with a high efficiency buck converter to form a complete energy harvesting solution optimized for high output impedance energy sources such as piezoelectric, solar, or magnetic transducers.

An ultralow quiescent current undervoltage lockout (UVLO) mode with a 16V rising threshold enables efficient energy extraction from sources with high open circuit voltages. This energy is transferred from the input capacitor to the output via a high efficiency synchronous buck regulator. The 16V UVLO threshold also allows for input to output current multiplication through the buck regulator. The buck features a sleep state that minimizes both input and output quiescent currents while in regulation.

Four output voltages of 3.45V, 4.1V, 4.5V and 5.0V are pin selectable with up to 100mA of continuous output current, and suit Li-Ion and LiFePO4 batteries as well as supercapacitors. An input protective shunt set at 20V provides overvoltage protection.

Features 1500nA Input Quiescent Current (Output in Regulation – No Load, VIN = 18V) 830nA Input Quiescent Current in UVLO, VIN = 12V 14V to 20V Input Operating Range Integrated Low-Loss Full-Wave Bridge Rectifier 16V UVLO Improves Power Utilization from High Voltage Current Limited Inputs Up to 100mA of Output Current High Efficiency Integrated Hysteretic Buck DC/DC Selectable Output Voltages: 3.45V, 4.1V, 4.5V, 5.0V Input Protective Shunt – Up to 25mA Pull-Down at VIN ≥ 20V Available in 10-Lead MSE and 3mm × 3mm DFN Packages Typical Application

Applications Piezoelectric Energy Harvesting Electro-Mechanical Energy Harvesting Low Power Battery Charging Wireless HVAC Sensors Mobile Asset Tracking Tire Pressure Sensors Battery Replacement for Industrial Sensors Packaging

Order Information

Demo Boards