General Description
The RT9259C is a dual-channel DC/DC controller specifically designed to deliver high quality power where 12V power source is available. This part consists of a synchronous buck controller and an LDO controller. The
synchronous buck controller integrates MOSFET drivers that support 12V+12V bootstrapped voltage for high
efficiency power conversion. The bootstrap diode is builtin to simplify the circuit design and minimize external part count. The LDO controller drives an external N-MOSFET for lower power requirement.

Features
Single 12V Bias Supply
Support Dual Channel Power Conversion
  One Synchronous Rectified Buck PWM Controller
  One Linear Controller
Both Controllers Drive Low Cost N-MOSFETs
Adjustable Frequency from 150kHz to 1MHz and Free-Run Frequency at 230kHz
Small External Component Count
±1% High Accuracy Output Voltage Regulation for Both PWM and LDO Controller
Two Internal VREFPower Support Lower to 0.8V
Adjustable External Compensation
Linear Controller Drives N-MOSFET Pass Transistor
Fully-Adjustable Outputs
Under Voltage Protection for Both Outputs
Over Current Fault Monitor on MOSFET; No Current Sense Resistor is Required.
RoHS Compliant and 100% Lead (Pb)-Free

Applications
Graphic Card GPU, Memory Core Power
Graphic Card Interface Power
Motherboard, Desktop and Servers Chipset and Memory Core Power
IA Equipments
Telecomm Equipments
High Power DC-DC Regulators