The LTC3556 multifunction power management IC for Li-ion/polymer battery applications integrates the company’s switching PowerPath manager, a stand-alone battery charger, an ideal diode, an I2 C control, a synchronous buck-boost regulator, two synchronous buck regulators plus an always-on LDO in a 4 x 5-mm QFN package.
The switching input stage converts nearly all of the 2.5 W available from the USB port to charging current, enabling up to 700 mA from a 500-mA USB supply or up to 1.5 A when wall powered. An internal 180-mΩ ideal diode and optional external ideal diode controller provide a low-loss power path. The onboard synchronous buck-boost regulator can deliver up to 1 A continuously. (From $4.80 ea/1,000 — available now.)
Linear Technology , Milpitas , CA
Information 408-432-1900
http://www.linear.com
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