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.

特性 Features

? 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 100 Lead (Pb)-Free

Applications

? Add-on graphic core power card

? DDR SDRAM core power

? Gaming Console

? High power density consideration platform

? Desktop/motherboard high power devices

? Power sequencing-concerned power application