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