General Description
The RT9209/A is a single power supply PWM DC-DC converter controller designed to drive N-MOSFET in a synchronous buck topology. The IC integrates the control, output adjustment, monitoring and protection functions into a small 8-pin package.

Features
• Operates at 5V
• 0.8V Internal Reference
• Drives Two N-MOSFET
• Voltage Mode PWM Control
• Fast Transient Response
• Fixed 260kHz/400kHz Oscillator Frequency
• Dynamic 0 to 100% Duty Cycle
• Internal PWM Loop Compensation
• Internal Soft-Start
• Adaptive Non-Overlapping Gate Driver
• Over-Voltage Protection Uses Lower MOSFET
• RoHS Compliant and 100% Lead (Pb)-Free

Applications
• Motherboard Power Regulation for Computers
• Subsystems Power Supplies
• Cable Modems, Set Top Box, and DSL Modems
• DSP and Core Communications processor Supplies
• Memory Power Supplies
• Personal Computer Peripherals
• Industrial Power Supplies
• 5V-Input DC-DC Regulators
• Low Voltage Distributed Power Supplies