The WM8325 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 WM8325 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 InstantConfig™ interface enables an external EEPROM to configure the WM8325. The WM8325 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 processor core domains. DC-DC3 / DC-DC4 can be connected together and operated in ‘dual’ mode to support an increased current load of up to 1.6A. An on-chip regulator provides power for always-on PMIC functions such as register map and the RTC. The device provides autonomous backup battery switchover.