WM8326

w WM8326 Processor Power Management Subsystem DESCRIPTION The WM8326 is an integrated power-management subsystem which provides a cost-effective, flexible, single-chip solution for power management. It is specifically targeted at the requirements of a range of low-power portable consumer products, but is suitable to any application with a multimedia processor. The WM8326 is designed to operate as a system PMIC supporting the ARM9™, ARM11™ and ARM Cortex-A™ processors, but is also capable of supporting the majority of application and mobile processors at the heart of a wide range of low-power consumer multimedia applications. The start-up behaviour and configuration is fully programmable in an integrated OTP non-volatile memory. This highly flexible solution helps reduce time-to-market, as changing application requirements can be very easily accommodated in the OTP. The InstantConfigTM interface enables an external EEPROM to configure the WM8326. The WM8326 power management subsystem comprises four programmable DC-DC converters and eleven LDO regulators (four of which are low-noise for supplying sensitive analogue subsystems). The integrated OTP bootstrap circuitry controls the start-up sequencing and voltages of the converters and regulators as well as the sequencing of system clocks. The DC-DC converters deliver high performance and high efficiency across a wide range of operating conditions. They are optimised to support the high load current transients seen in modern pr...