RichTek Technology Corporation Special Purpose Regulators RT9643PQV

The RT9643PQV is a 5-channel ACPI-compliant power regulator designed for desktop and server motherboard applications. It integrates a PWM regulator for DDR memory VDDQ, a linear regulator for DDR VTT with a peak current capability of 1.5A, a 1.2V ultra-low-dropout linear controller for chipset power, and a 3.3V standby linear regulator with a 1.25A peak current capability. The device operates in multiple power states (S0, S3, S5) and features power management capabilities that conform to ACPI specifications. The RT9643PQV is housed in a compact VQFN-24L 5x5 package and supports a fixed frequency switching operation at 300kHz. It includes features such as thermal shutdown, power good signal indication, and options for current sensing. The product is RoHS compliant and suitable for both Pb-free and SnPb soldering processes. This regulator is particularly suitable for applications requiring efficient power management and stability in power delivery for DDR memory and chipset components.