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.

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