Chapter 200

Universal Li-Ion battery charger operates from USB and 6V to 36V input in just 2cm2

Liu Yang


The LTC4089 and LTC4089-5 universal Li-Ion battery chargers are described and compared to a traditional dual input charger. They integrate a high voltage and wide input range monolithic buck switching regulator and a USB power manager/charger into a compact thermally enhanced DFN package.



Li-Ion battery charger

buck switching regulator

dual input charger

USB power manager


There are a number of advantages to offering USB and high input voltage power and battery-charging capability in handheld devices such as GPS navigators, PDAs, digital still cameras, photo viewers and MP3 players. For instance, ...

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