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General Description

The RT8283B is a high-efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 3A output current from a 4.5V to 23V input supply. The RT8283Bs current mode architecture and external compensation allow the transient response to be optimized over a wide range of loads and output capacitors. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. The RT8283B provides output under voltage protection and thermal shutdown protection. The low current (

Features

? ±1.5 High Accuracy Feedback Voltage

? 4.5V to 23V Input Voltage Range

? 3A Output Current

? Integrated N-MOSFET Switches

? Current Mode Control

? Fixed Frequency Operation : 1.2MHz

? Adjustable Output from 0.8V to 20V

? Up to 95 Efficiency

? Programmable Soft-Start

? Stable with Low-ESR Ceramic Output Capacitors

? Cycle-by-Cycle Over Current Protection

? Input Under Voltage Lockout

? Output Under Voltage Protection

? Thermal Shutdown Protection

? RoHS Compliant and Halogen Free

Applications

? Wireless AP/Router

? Set-Top-Box

? Industrial and Commercial Low Power Systems

? LCD Monitors and TVs

? Green Electronics/Appliances

? Point of Load Regulation of High-Performance DSPs