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BQ25505RGRR

Ultra low power harvester power management IC with boost charger, and autonomous power multiplexor

Availability: 7,257

Packaging

Package | PIN: VQFN (RGR) | 20
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $3.47
10-24 $3.12
25-99 $2.91
100-249 $2.61
250-499 $2.44
500-749 $2.12
750-999 $1.84
1,000+ $1.80

Features

  • Ultra Low-Power With High-Efficiency DC-DC Boost Charger
    • Cold-Start Voltage: VIN ≥ 600 mV
    • Continuous Energy Harvesting From Input Sources as Low as 100 mV
    • Ultra-Low Quiescent Current of 325 nA
    • InputVoltage Regulation Prevents Collapsing High-Impedance Input Sources
    • Ship ModeWith < 5 nA From Battery
  • Energy Storage
    • Energy can be Stored to Rechargeable Li-Ion Batteries, Thin-FilmBatteries, Super-Capacitors, or Conventional Capacitors
  • Battery Charging and Protection
    • Internally SetUndervoltage Level
    • User-Programmable OvervoltageLevel
  • Battery-Good Output Flag
    • Programmable Threshold and Hysteresis
    • Warn AttachedMicrocontrollers of Pending Loss of Power
    • Can be Used to Enable or DisableSystem Loads
  • Programmable Maximum Power Point Tracking (MPPT)
    • Integrated MPPT for Optimal Energy Extraction From a Varietyof Energy Harvesters
  • Gate Drivers for Primary (Nonrechargeable) and Secondary (Rechargeable) Storage Element Multiplexing
    • Autonomous Switching Based onVBAT_OK
    • Break-Before-Make Prevents System Rail Droop

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Texas Instruments  BQ25505RGRR

The bq25505 device is specifically designed to efficiently extract the microwatts (µW) tomiliwatts (mW) of power generated from a variety of DC energy harvesting, high-impedance sourceslike photovoltaic (solar) or thermal electric generators (TEGs) without collapsing those sources.The battery-management features of the bq25505 ensure that a secondary rechargeable battery is notovercharged by this extracted power, with voltage boosted, nor depleted beyond safe limits by asystem load. The integrated multiplexer gate drivers autonomously switch the system load to aprimary nonrechargeable battery if the secondary battery voltage falls below the user-definedVBAT_OK threshold.