bq25505

Product Folder Order Now Technical Documents Tools & Software Support & Community bq25505 SLUSBJ3F – AUGUST 2013 – REVISED MARCH 2019 bq25505 ultra low-power boost charger with battery management and autonomous power multiplexer for primary battery in energy harvester applications VRDIV VBAT_OV OK_PROG OK_HYST Efficiency (%) 1 Features 1 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 – 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, SuperCapacitors, 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 Loads Programmable Maximum Power Point Tracking (MPPT) – Integrated MPPT for Optimal Energy Extraction From a Variety of Energy Harvesters Gate Drivers for Primary (Nonrechargeable) and Secondary (Rechargeable) Storage Element Multiplexing – Autonomous Switching Based on VBAT_OK – Break-Before-Make Prevents System Rail Droop Simplified Schematic CSTOR Solar + Cell - L1 CIN CREF VOC_SAMP LBOOST VREF_SAMP VSS MPPT ...