BQ25505RGRT .

The BQ25505RGRT is an ultra low power harvester Power Management IC with boost charger and autonomous power multiplexer. It is specifically designed to efficiently extract the microwatts (µW) to milliwatts (mW) of power generated from a variety of DC energy harvesting, high-impedance sources like photovoltaic (solar) or thermal electric generators (TEGs) without collapsing those sources. The battery-management features of the BQ25505 ensure that a secondary rechargeable battery is not overcharged by this extracted power, with voltage boosted, nor depleted beyond safe limits by a system load. The integrated multiplexer gate drivers autonomously switch the system load to a primary non-rechargeable battery if the secondary battery voltage falls below the user-defined VBAT_OK threshold.

• Input voltage regulation prevents collapsing high-impedance input sources
• Battery charging and protection
• Internally set undervoltage level
• User-programmable overvoltage level
• Battery-good output flag
• Programmable threshold and hysteresis
• Warn attached microcontrollers of pending loss of power
• Can be used to enable or disable system loads
• Programmable maximum power point tracking
• Green product and no Sb/Br

Applications

Power Management, Wireless, Portable Devices, Industrial