TPS65921,pdf(Power Management

The TPS65921 device is a highly integrated power-management circuit (IC) that supports the power and peripheral requirements of the OMAP applicaTIon procesors. The device contains power management, a universal serial bus (USB) high-speed (HS) transceiver, an analog-to-digital converter (ADC), a real-TIme clock (RTC), a keypad interface, and an embedded power control (EPC). The power porTIon of the device contains three buck converters, two controllable by a dedicated SmartReflex™ class-3 interface, mulTIple low-dropout (LDO) regulators, an EPC to manage the power-sequencing requirements of OMAP, and an RTC and backup module. The RTC can be powered by a backup battery when the main supply is not present. Backup battery can be charged from the main battery.