Datasheet Linear Technology LTC3550-1

LTC3550-1
Dual Input USB/AC Adapter
Li-Ion Battery Charger with
600mA Buck Converter
DESCRIPTIO
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в–  Internal thermal feedback regulates the battery charge
current to maintain a constant die temperature during high
power operation or high ambient temperature conditions.
The float voltage is fixed at 4.2V and the charge currents
are programmed with external resistors. The LTC3550-1
terminates the charge cycle when the charge current drops
below the programmed termination threshold after the
final float voltage is reached. With power applied to both
inputs, the LTC3550-1 can be put into shutdown mode
reducing the DCIN supply current to 20ОјA, the USBIN
supply current to 10ОјA, and the battery drain current to
less than 2ОјA. …