Tiniest charger-with-DC/DC powers Bluetooth

Dallas – Texas Instruments’ bq2501x family, combining a precision USB/AC charger system and a synchronous DC/DC converter, charges and powers portable systems from either an AC adapter or USB port with autonomous power source selection. Billed as the smallest battery charger-with-converter available for space-limited portable applications, the bq25010, in a 3.5-by-4.5 mm QFN for single-cell lithium-ion batteries, is optimized for Bluetooth headsets and accessories.