Click to expand full text
RT9945
Power Management ICs for Handheld Device
General Description
The RT9945 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 power on timing control for complete flexibility. The linear charger integrates LDO, MOSFET pass element, and thermal-regulation circuitry. The proprietary thermalregulation circuitry limits the die temperature when fast charging or while exposed to high ambient temperatures, allowing maximum charging current without damaging the IC.
RT9945 Datasheet
