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Ultra Low Power Harvester Power Management IC with Boost Charger, and Autonomous Power Multiplexor


Package | PIN: RGR | 20
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $4.34
10-24 $3.90
25-99 $3.64
100-249 $3.27
250-499 $3.05
500-749 $2.65
750-999 $2.30
1000+ $2.25


  • Ultra Low-Power With High-Efficiency DC-DC
    Boost Charger
    • Cold-Start Voltage: VIN ≥ 330 mV
    • Continuous Energy Harvesting From Input
      Sources as Low as 100 mV
    • Ultra-Low Quiescent Current of 325 nA
    • Input Voltage Regulation Prevents Collapsing
      High-Impedance Input Sources
    • Ship Mode With < 5 nA From Battery
  • Energy Storage
    • Energy can be Stored to Rechargeable Li-Ion
      Batteries, Thin-Film Batteries, Super-Capacitors,
      or Conventional Capacitors
  • Battery Charging and Protection
    • Internally Set Undervoltage Level
    • User-Programmable Overvoltage Level
  • Battery-Good Output Flag
    • Programmable Threshold and Hysteresis
    • Warn Attached Microcontrollers of Pending
      Loss of Power
    • Can be Used to Enable or Disable System
  • Programmable Maximum Power Point Tracking
    • Integrated MPPT for Optimal Energy
      Extraction From a Variety of Energy
  • Gate Drivers for Primary (Nonrechargeable) and
    Secondary (Rechargeable) Storage Element
    • Autonomous Switching Based on VBAT_OK
    • Break-Before-Make Prevents System Rail

Texas Instruments  BQ25505RGRR

The bq25505 device is specifically designed to efficiently extract the microwatts (µW) to miliwatts (mW) of power generated from a variety of DC energy harvesting, high-impedance sources like 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 not overcharged by this extracted power, with voltage boosted, nor depleted beyond safe limits by a system load. The integrated multiplexer gate drivers autonomously switch the system load to a primary nonrechargeable battery if the secondary battery voltage falls below the user-defined VBAT_OK threshold.