GENERAL DESCRIPTION
The high equivalent operating frequency also reduces the component dimension and the output voltage ripple in load transient. RT9245A implements both voltage and current loops to achieve good regulation, response and power stage thermal balance. RT9245A applies the DCR sensing technology newly. The RT9245A extracts the DCR of output inductor as sense component to deliver a precise load line regulation and good thermal balance for next generation processor application. Current sense setting, droop tuning, VCORE initial offset and over current protection are independent on compensation circuit of voltage loop. The feature greatly facilitates the flexibility of CPU power supply design and tuning. The DAC output of RT9245A supports AMD K8 5-bit VID and Intel® VRD10.x with 6-bit VID input, precise offset value & smooth VCORE transient at VID jump. The IC monitors the VCORE voltage for PGOOD and over-voltage protection. Soft-start, over-current protection and programmable under-voltage lockout are also provided to assure the safety of microprocessor and power system.
Richtek Technology
