The MAX17710 is a complete system for charging and protecting micro power-storage cells. The IC can manage poorly regulated sources such as energy-harvesting devices with output levels ranging from 1µW to 100mW. The device also includes a boost regulator circuit for charging the cell from a source as low as 0.75V (typ). An internal regulator protects the cell from overcharging.

 

Output voltages supplied to the target applications are regulated using an efficient adjustable low-dropout (LDO) linear regulator with selectable voltages of 3.3V, 2.3V, or 1.8V. The output regulator operates in a selectable high-power or low-power mode to minimize drain of the cell. Internal voltage protection prevents the cell from over discharging. The device is available in an ultra-thin, 3mm x 3mm x 0.5mm 12-pin UTDFN package.

 

The MAX17710 evaluation kit (EV kit) is a fully assembled and tested PCB that contains all the components necessary to evaluate the performance of the MAX17710 energy-harvesting charger and protector. The EV kit features a micro-energy cell (MEC), a solid-state, rechargeable, thin-power solution. Solar cells are installed on the EV kit as the power source for an energy-harvesting application. The solar cells demonstrate low-power charging of the MEC with ambient light. The IC can regulate and charge from various energy-harvesting sources that can be added externally.

 

The EV kit is a self-powered board. The EV kit output charges the MEC with current as low as 1µA. The EV kit provides test points to monitor the inputs and outputs, and jumpers to test the various settings. An LED is included on the CHG output to indicate if the boost is operating. The IC is available in a 12-pin UTDFN package with an exposed pad.