BQ25570_14 Datasheet, PDF (1/41 Pages) Texas Instruments – Ultra Low Power Harvester Power Management IC with Boost Charger, and Nano-Powered Buck Converter

bq25570
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SLUSBH2C – MARCH 2013 – REVISED JANUARY 2014
Ultra Low Power Harvester Power Management IC with Boost Charger, and Nano-Powered
Buck Converter
Check for Samples: bq25570
FEATURES
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• 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
• Energy Storage
– Energy can be Stored to Re-chargeable Li-
ion Batteries, Thin-film Batteries, Super-
capacitors, or Conventional Capacitors
• Battery Charging and Protection
– Internally Set Undervoltage Level
– User Programmable Overvoltage Levels
• 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 Step Down Regulated Output
(Buck)
– High Efficiency up to 93%
– Supports Peak Output Current up to 110
mA (typical)
• Programmable Maximum Power Point Tracking
(MPPT)
– Provides Optimal Energy Extraction From a
Variety of Energy Harvesters including
Solar Panels, Thermal and Piezo Electric
Generators
APPLICATIONS
• Energy Harvesting
• Solar Charger
• 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
DESCRIPTION
The bq25570 is a highly integrated energy harvesting Nano-Power management solution that is well suited for
meeting the special needs of ultra low power applications. The product is specifically designed to efficiently
acquire and manage the microwatts (µW) to milliwatts (mW) of power generated from a variety of DC sources
like photovoltaic (solar) or thermal electric generators. The bq25570 is the first device of its kind to implement a
highly efficient boost charger with a nano-powered buck converter targeted toward products and systems, such
as wireless sensor networks (WSN) which have stringent power and operational demands. The design of the
bq25570 starts with a dc/dc boost converter/charger that requires only microwatts of power to begin operating.
Once started, the boost charger can effectively extract power from low voltage output harvesters such as
thermoelectric generators (TEGs) or single or dual cell solar panels. The boost charger can be started with VIN
as low as 330 mV, and once started, can continue to harvest energy down to VIN = 100 mV.
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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