General Description

The RT8283A 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 RT8283As 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 RT8283A also provides output under voltage protection and thermal shutdown protection. The low current (

特性 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 : 340kHz

● Output Adjustable 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