500 mA charge current, 1-cell Li-Ion — the USB charger IC for space-constrained designs
The BQ24026DRCR is a Texas Instruments linear charger IC from the bqTINY™-II family, purpose-built for single-cell Lithium Ion/Polymer battery packs terminated at 4.2 V. Maximum charge current is 500 mA, programmable via an external resistor — the constant-current phase is set by the resistor value, and a separate timer pin sets the total charge duration as a safety backup. Input supply comes from a USB port or a regulated wall adapter up to 6.5 V, with the charger automatically entering a low-power sleep mode when the input voltage drops below the battery voltage.
Active lifecycle and compliance posture
The base product number is BQ24026, so PCN notifications and datasheet revisions are tracked under that root.