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