bq25570
www.ti.com
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
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FEATURES
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Ultra Low Power DC/DC Boost Charger
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Programmable Step Down Regulated Output
(Buck)
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Cold-start Voltage: VIN ≥ 330 mV
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High Efficiency up to 93%
Continuous Energy Harvesting From VIN as
low as 100 mV
Supports Peak Output Current up to 110
mA (typical)
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Input Voltage Regulation Prevents
Collapsing High Impedance Input Sources
Programmable Maximum Power Point Tracking
(MPPT)
Full Operating Quiescent Current of 488 nA
(typical)
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Provides Optimal Energy Extraction From a
Variety of Energy Harvesters including
Solar Panels, Thermal and Piezo Electric
Generators
Ship Mode with < 5 nA From Battery
•
Energy Storage
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Energy can be Stored to Re-chargeable Li-
ion Batteries, Thin-film Batteries, Super-
capacitors, or Conventional Capacitors
APPLICATIONS
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Energy Harvesting
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Battery Charging and Protection
Solar Charger
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Internally Set Undervoltage Level
Thermal Electric Generator (TEG) Harvesting
Wireless Sensor Networks (WSN)
Low Power Wireless Monitoring
Environmental Monitoring
User Programmable Overvoltage Levels
Battery Good Output Flag
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Programmable Threshold and Hysteresis
Warn Attached Microcontrollers of Pending
Loss of Power
Bridge and Structural Health Monitoring (SHM)
Smart Building Controls
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Can be Used to Enable or Disable System
Loads
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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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2013–2014, Texas Instruments Incorporated
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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