RT9941 - Richtek Technology Corporation

RT9941 Power Management ICs

The RT9941 is a complete power management IC (PMIC) for handheld device platform. This PMIC contains a fully integrated linear charger for a single cell Lithium Ion battery, five LDO linear regulators and two high efficiency buck converters, a comparator, a reset and an I2C serial interface to program one buck and one regulator output voltages as well as pow.

Features

z Charger Adapter & Battery Two Input with Auto Power Dynamic Path. ` PWR_IN LDO support continuous 1.5A, peak 2A current ` 4.5V to 5.5V Operation Voltage Range with Max. Input 18V from PWR_IN Pin ` Switch Well for LDO and Charger Power MOSFET ` Set Charge Current by ISETA Pin ` Charge Status Indicator ` Interrupt for PWR_IN Plug In/Out Time Out and Charger Done. ` Battery Temperature Monitoring Hysteretic Buck ` Buck 1 for DDR Memory, Adjustable Voltage and 600mA Output Current 2 ` Buck 2 for PDN with 25mV/step I C Adjustable 800mA Output Current ` Max. Efficiency Up to 90% LDO ` LDO1 : 3.3V.