MAX8903A–MAX8903E Lithium Battery DC-DC Chargers The MAX8903A–MAX8903E/MAX8903G/MAX8903H/MAX8903J/MAX8903Y are integrated single-cell Li+ battery chargers and Smart Power Selector™ that operate from dual power inputs (AC adapter and USB). The switch-mode charger operates at a high switching frequency, eliminating the need for a heat sink and allowing the use of small external components. The device can be powered by a separate USB power supply or AC adapter, or it can accept two power inputs from a single input. The chip integrates all charging functions and the power switches for switching between the battery, external power supply, and load. No external MOSFET, reverse protection diode, or current-sense resistor is required.
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