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LTC4085-3/LTC4085-4
USB Power Manager with
Ideal Diode Controller and
3.95V Li-Ion Charger
DESCRIPTION FEATURES
в– в– в– в– в– в– в– в– в– The LTCВ®4085-3/LTC4085-4 is a USB power manager
and Li-Ion/Polymer battery charger designed for portable
battery-powered applications. The part controls the total
current used by the USB peripheral for operation and
battery charging. The total input current can be limited to
20% or 100% of a programmed value up to 1.5A (typically
100mA or 500mA). Battery charge current is automatically reduced such that the sum of the load current and
charge current does not exceed the programmed input
current limit. Seamless Transition Between Input Power Sources:
Li-Ion/Polymer Battery, USB and 5V Wall Adapter
215mО© Internal Ideal Diode Plus Optional External
Ideal Diode Controller Provide Low Loss PowerPathв„ў
When Wall Adapter/USB Input Not Present
Load Dependent Charging Guarantees Accurate
USB Input Current Compliance
3.95V Float Voltage Improves Battery Life Span and
High Temperature Safety Margin
Constant-Current/Constant-Voltage Operation with …