What this single-cell protector does for your pack design
The Texas Instruments BQ298000RUGR is a battery protection IC designed for single-cell Lithium Ion/Polymer packs. It integrates three fault-detection functions — overcurrent, overvoltage, and overtemperature — into an 8-X2QFN package that measures just 1.5x1.5 mm. That footprint fits inside a slim battery assembly or a handheld enclosure where board space is the constraint, not the BOM cost of a discrete protection circuit. The operating temperature range of -40°C to 85°C covers industrial and portable equipment environments — think power-tool packs, portable medical devices, or outdoor IoT nodes that see seasonal extremes. It is not AEC-Q100 graded, so for automotive cabin or underhood use you would need a qualified alternative; for everything else this is the straightforward fit.
Package and mounting
The BQ298000RUGR monitors three fault conditions: overcurrent, overvoltage, and overtemperature. Overvoltage protection prevents the cell from charging above its safe voltage limit — critical for Li-Ion chemistry where a single overvoltage event can start thermal runaway. Overcurrent protection covers both discharge overcurrent and short-circuit scenarios; the IC will disconnect the load when current exceeds the detection threshold. Overtemperature protection monitors the die temperature and shuts down if the pack gets hot enough to risk cell damage. The datasheet specifies the exact threshold voltages and current limits — those numbers are the ones to verify against your cell manufacturer's absolute maximum ratings during the protection-coordination review.
Package and mounting — what the 1.5x1.5 mm X2QFN means for assembly
The 8-X2QFN (1.5x1.5 mm) package is a tiny, leadless quad-flat no-lead with an exposed pad for thermal conduction. Surface-mount assembly is standard, but the small pad size and fine pitch mean your stencil aperture and reflow profile need to be dialled in for that specific footprint. The supplier device package is listed as 8-X2QFN (1.5x1.5) — that is the exact body size, so your PCB land pattern should match the TI recommended layout. No special bake requirements beyond the standard MSL handling for that package family.
Lifecycle and sourcing posture
The BQ298000RUGR carries an Active lifecycle status and is ROHS3 compliant. Sourcing is straightforward through independent distribution — we quote this part to order against an RFQ, with availability and current pricing confirmed at the time of quote. No LTB risk, no broker-only scarcity.