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

•

Ultra Low Power DC/DC Boost Charger

•

Programmable Step Down Regulated Output

(Buck)

–

Cold-start Voltage: VIN

≥ 330 mV

–

High Efficiency up to 93%

–

Continuous Energy Harvesting From VIN as

low as 100 mV

–

Supports Peak Output Current up to 110

mA (typical)

–

Input Voltage Regulation Prevents

Collapsing High Impedance Input Sources

•

Programmable Maximum Power Point Tracking

(MPPT)

–

Full Operating Quiescent Current of 488 nA

(typical)

–

Provides Optimal Energy Extraction From a

Variety of Energy Harvesters including

–

Ship Mode with < 5 nA From Battery

Solar Panels, Thermal and Piezo Electric

•

Energy Storage

Generators

–

Energy can be Stored to Re-chargeable Li-

ion Batteries, Thin-film Batteries, Super-

APPLICATIONS

capacitors, or Conventional Capacitors

•

Energy Harvesting

•

Battery Charging and Protection

•

Solar Charger

–

Internally Set Undervoltage Level

•

Thermal Electric Generator (TEG) Harvesting

–

User Programmable Overvoltage Levels

•

Wireless Sensor Networks (WSN)

•

Battery Good Output Flag

•

Low Power Wireless Monitoring

–

Programmable Threshold and Hysteresis

•

Environmental Monitoring

–

Warn Attached Microcontrollers of Pending

•

Bridge and Structural Health Monitoring (SHM)

Loss of Power

•

Smart Building Controls

–

Can be Used to Enable or Disable System

•

Portable and Wearable Health Devices

Loads

•

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.

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.