BQ25171QWDRCRQ1

• Automotive-Qualified Linear Battery Charger in a 10-Pin VSON Package
• 3V to 18V Input Supply Range
• Single Charge Output Rated at 0.8A and 10.5V
• -40°C to 125°C Operating Range with a 125°C Maximum Junction Temperature
• Low Quiescent Supply Current in the Microamp Range
• Compact 3mm by 3mm Footprint with a 1mm Profile Height

The Texas Instruments BQ25171QWDRCRQ1 is an automotive-qualified linear battery charger in a 10-pin VSON package measuring 3 mm by 3 mm with a 1 mm profile height. It operates from a 3 V to 18 V input supply and delivers a single charge output rated at 800 mA and 10.5 V, drawing 450 µA nominal supply current. The device is specified over a -40 °C to 125 °C operating range with a 125 °C maximum junction temperature, matching the under-hood and cabin ambient conditions automotive designs require. Per the product title, BQ25171QWDRCRQ1 supports 1-cell to 2-cell Li-ion and Li FePO4 packs and 1-cell to 6-cell NiMH packs.

A linear charger integrates the pass element and charge-control loop on one die, so it needs no inductor and produces no switching noise, which is why it is preferred over a switching charger in low-current, noise-sensitive or space-constrained designs. At 800 mA from a 3 V to 18 V rail, the BQ25171QWDRCRQ1 targets automotive backup and auxiliary batteries: e Call and telematics backup packs, dashcams, alarm and immobiliser modules, tyre-pressure and sensor nodes, and battery-backed memory or real-time clock rails. The -40 °C to 125 °C rating and the automotive qualification indicated by the part suffix are what separate it from a commercial-grade charger in the same footprint. Typical buyers are automotive tier-one suppliers and industrial equipment manufacturers who need an automotive-grade charger in a small VSON outline.