RT9256

Preliminary RT9256 Actively Alternative Mode Two-Phase / Dual Switching PWM Controller General Description The RT9256 is an analogous current mode design and is specifically promoted for high power density consideration platform with MLCC capacitor attached, such as high-end add-on graphic card core power and DDR SDRAM core power, etc. A highlight for RT9256 is the RichTek’ s new innovation of actively alternative mode operation two-phase power conversion or dual PWM controller operation. Based on above innovation architecture, the RT9256 provides more flexibility and higher performance to customer application. The part is implemented specially for multiple power sourcing with power budget limitation. The part comes to small footprint package VQFN-32L 5x5. Features z z z z z z z z z Analogous Current Mode Design Innovative Design for Actively Alternative Mode Operation : `Two-Phase Power Conversion `Dual PWM Controllers 2.5V to 12V Switching Source Power 0.8V to 3.3V Output Voltage Regulation Multiple Power Sourcing for Power Budget Limitation Adjustable VIN Feed-Forward Ramp Slope Adjustable Operation Frequency Precision Core Voltage Regulation Precision DCR Current Sensing (with High Quality Capacitor, X7R) ±1% VREF Accuracy Input Voltage : 12V or 5V Bias Enable and PGOOD Function for SequencingConcerned Power Over Current Protection Over Voltage Protection External Soft Start Setting Operation Frequency Up to 1.0MHz Per Channel 32-Lead VQFN Package RoHS Compliant and ...