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Demonstration circuit DC937A is a complete power controller for a USB powered device. It is based on the LTC4085 and provides a constant-current, constant-voltage linear battery charger, a USB power manager with PowerPath management for the battery. The 700mA CC/CV timer terminated, temperature qualified, linear charger targets Li-Ion batteries, and the USB power manager insures compliance with the USB power specification and PowerPath management for the battery. The demo board's input voltage range is 4.5V to 5.5V.