1. Ultra low power DC-DC boost Charger Cold-start Voltage: VIN ≥ 330 mV Continuous energy harvesting from VIN as low as 100 mV Input voltage regulation prevents collapsing high impedance input sources Full operating quiescent current of 488 nA (typical) Ship mode with < 5 nA from battery

2. Energy Storage Energy can be stored to re-chargeable li-ion batteries, thin-film batteries, super- capacitors, or conventional capacitors

3. Battery Charging and Protection Internally set undervoltage level User programmable overvoltage levels

4. 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

5. Programmable Step Down Regulated Output (Buck) High Efficiency up to 93% Supports Peak Output Current up to 110 mA (typical)

6. Programmable Maximum Power Point Tracking (MPPT) Provides optimal energy extraction from a variety of energy harvesters including solar panels, thermal and piezo electric generators

Description:

The bq25570 device is specifically designed to efficiently extract microwatts (µW) to milliwatts (mW) of power generated from a variety of high output impedance DC sources like photovoltaic (solar) or thermal electric generators (TEG) without collapsing those sources. The battery management features ensure that a rechargeable battery is not overcharged by this extracted power, with voltage boosted, or depleted beyond safe limits by a system load. In addition to the highly efficient boosting charger, the bq25570 integrates a highly efficient, nano- power loads buck converter for providing a second power rail to systems such as wireless sensor networks (WSN) which have stringent power and operational demands. All the capabilities of bq25570 are packed into a small foot-print 20-lead 3.5-mm x 3.5-mm QFN package (RGR).

Applications:

-Energy Harvesting

-Solar Chargers

-Thermal Electric Generator (TEG) Harvesting

-Wireless Sensor Networks (WSN)

-Low Power Wireless Monitoring

-Environmental Monitoring

-Bridge and Structural Health Monitoring (SHM)

-Smart Building Controls

-Portable and Wearable Health Devices

-Entertainment System Remote Controls

Package includes:

1 x CJMCU-2557 BQ25570 Nano Power Boost Charger