General Description
The RT7251A/B is a high efficiency, monolithic synchronous step-down DC/DC converter that can operate at 340kHz/800kHz, while delivering up to 1.5A output current from a 4V to 17V input supply. The RT7251A/Bs current mode architecture allows the transient response to be optimized. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up.

Features
• 4V to 17V Input Voltage Range
• 1.5A Output Current
• Internal N-MOSFETs
• Current Mode Control
• Fixed Frequency Operation : 340kHz/800kHz
• Output Adjustable from 0.8V to 12V
• Up to 95% Efficiency
• Internal Compensation
• Stable with Low ESR Ceramic Output Capacitors
• Cycle-by-Cycle Over Current Protection
• Input Under Voltage Lockout
• Output Under Voltage Protection
• Output Over Voltage Protection
• Power Good Indicator
• Thermal Shutdown Protection
• RoHS Compliant and Halogen Free

Applications
• Industrial and Commercial Low Power Systems
• Computer Peripherals
• LCD Monitors and TVs
• Green Electronics/Appliances
• Point of Load Regulation for High-Performance DSPs, FPGAs, and ASICs