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BQ25570

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Ultra Low power Harvester power Management IC with boost charger, and Nanopower Buck Converter

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Data sheet

BQ25570

ACTIVE
Data sheet Order now

Product details

Number of series cells 1 Charge current (max) (A) 0.1 Vin (max) (V) 5.1 Cell chemistry Li-Ion/Li-Polymer, SuperCap Battery charge voltage (min) (V) 2.2 Battery charge voltage (max) (V) 5.5 Absolute max Vin (max) (V) 5.5 Control topology Switch-Mode Boost Control interface Standalone (RC-Settable) Features Input OVP, Solar input/MPPT Vin (min) (V) 0.6 Rating Catalog Operating temperature range (°C) -40 to 125
Number of series cells 1 Charge current (max) (A) 0.1 Vin (max) (V) 5.1 Cell chemistry Li-Ion/Li-Polymer, SuperCap Battery charge voltage (min) (V) 2.2 Battery charge voltage (max) (V) 5.5 Absolute max Vin (max) (V) 5.5 Control topology Switch-Mode Boost Control interface Standalone (RC-Settable) Features Input OVP, Solar input/MPPT Vin (min) (V) 0.6 Rating Catalog Operating temperature range (°C) -40 to 125
VQFN (RGR) 20 12.25 mm² 3.5 x 3.5
  • Ultra Low Power DC-DC Boost Charger
    • Cold-Start Voltage: VIN ≥ 600 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
  • Ultra Low Power DC-DC Boost Charger
    • Cold-Start Voltage: VIN ≥ 600 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

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 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).

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 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).
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Type Title Date
* Data sheet bq25570 nano power boost charger and buck converter for energy harvester powered applications datasheet (Rev. G) PDF | HTML 06 Mar 2019
Technical article How energy harvesting can extend the life of your fault indicator on the grid PDF | HTML 18 Oct 2017
White paper Cities grow smarter through innovative semiconductor technologies 07 Jul 2017
Technical article Trends in building automation: predictive maintenance PDF | HTML 01 Nov 2016
Technical article Let’s harvest that energy with MSP430™ FRAM microcontrollers PDF | HTML 24 Feb 2016
Technical article Energy harvesting solutions enable expanded 4-20mA current loop functionality PDF | HTML 04 Feb 2016
Technical article The secrets of energy harvesting: The sloth and the bear PDF | HTML 29 Sep 2015
User guide User's Guide for bq25570 Battery Charger Evaluation Module for Energy Harvesting (Rev. A) 23 Aug 2014
Product overview Battery Management Solutions for Wearable and Fitness Devices (Rev. C) 18 Aug 2014
Analog Design Journal Accurately measuring efficiency of ultralow-IQ devices 22 Jan 2014
Product overview Industry’s Most Efficient Nano Power Harvesting Solutions (Rev. A) 08 Nov 2013

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