Complete Power Management IC 169-PIN WLP T/R

The MAX8958 provides a complete power-management solution for the latest portable application devices using a central processing unit (CPU) and system controller unit (SCU). The IC powers both the CPU and SCU along with some peripherals. The power-management subsystem has five step-down converters and 13 LDOs. Two step-down converters (Vcc, VNN) are designed with 7-bit parallel bus VID control and differential remote output voltage sensing. The Vcc and VNN converters provide power to the CPU core and the graphics controller core. The parallel VID bus between the IC and the CPU processor enables the converters to support dynamic output voltage changes required for efficient power management. Slew rate control minimizes surge currents to and from the battery. The VID for Vcc and VNN are multiplexed onto the same set of pins to optimize the pin count. Both these step-down converters use the Quick-PWMTM architecture. In addition, three hysteretic, high-efficiency, step-down converters in the IC provide power for linear dropout regulators (LDOs) in this IC. The IC also features 13 LDOs to power RF, CPU, SCU, and peripherals. The IC also has a real-time clock/calendar (RTC) that provides 32.768kHz 1.8V buffered outputs, seconds, minutes, hours, day, date, month and year information as well as a time user-programmable alarm. The RTC supports both 12/24 hour time setting formats with AM/PM for the 12-hour mode and supports BCD and binary. A backup battery charger is also included. The IC is available in a space-efficient, 5.4mm x 5.7mm, 169-bump WLP package (0.4mm pitch) .