General Description

The RT7257G is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 3A output current from a 4.5V to 18V input supply. The RT7257Gs current mode architecture and external compensation allow the transient response to be optimized over a wide input voltage range and loads.

Features

• ±1.5 High Accuracy Reference Voltage

• 4.5V to 18V Input Voltage Range

• 3A Output Current

• Integrated N-MOSFET Switches

• Current Mode Control

• Fixed Frequency Operation : 800kHz

• Output Adjustable from 0.8V to 12V

• Up to 95 Efficiency

• Programmable Soft-Start

• Stable with Low ESR Ceramic Output Capacitors

• Cycle-by-Cycle Current Limit

• 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