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RY3420 1.2MHz 2A Synchronous Step-Down Regulator
RY3420 Features
• High Efficiency: Up to 96% • 2.5V to 5.5V Input Voltage Range • 1.2MHz Constant Frequency Operation • No Schottky Diode Required • Low Dropout Operation: 100% Duty Cycle • PFM Mode for High Efficiency in Light Load
• Over Temperature Protected • Low Quiescent Current: 40μA • Short Circuit Protection • Inrush Current Limit and Soft Start • 2A Continuous Output Current • SOT23-5 package
RY3420 Applications
• Cellular and Smart Phones
• Portable Instruments
• Wireless and DSL Modems • PDAs
• Digital Still and Video Cameras • PC Cards
RY3420 General Description
k The RY3420 is a high-efficiency monolithic synchronous buck regulator using a constant frequency, current mode
architecture.