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HM5801
PMU for Portable Applications
GENERAL DESCRIPTION
The HM5801 is a integrated power management unit for small handheld portable applications. It contains a single-cell Lithium Ion battery charger, a synchronous step-down DC-DC converter and 2 Low Dropout Regulators. It allows charging from both wall adapter and USB port. When charging from wall adapter, the HM5801 increases the charging current automatically.
The battery charger is a highly integrated charging management device targeted at space limited portable applications. It offers an integrated MOSFET and current sensor, reverse blocking protection, high accuracy current and voltage regulation, and charge termination. It charges a battery in three phases: trickle charging, constant current, and constant voltage.