Active production — single-cell fuel gauge with Impedance Track™
The BQ27505YZGT-J5 is a single-cell Li-Ion battery monitor from Texas Instruments' Impedance Track™ series.
I²C interface and DSBGA footprint
The I²C interface lets a host MCU read voltage, current, temperature, and state-of-charge without a dedicated ADC channel. The 12-DSBGA package measures roughly 2.2 mm x 2.0 mm — the board layout must route the I²C lines away from switching noise on the battery path. The Impedance Track™ algorithm compensates for cell aging and temperature, so the gauge stays accurate over the battery's service life without periodic full-cycle recalibration.
It is ROHS3 compliant, which simplifies EU and California market entry. The base product number is BQ27505, so future variant changes (e.g., firmware revision) will share the same footprint.