The RT8253A 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 RT8253A's 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. Fault conditions also include output under voltage protection and thermal shutdown. The RT8253A low current (<3μA) shutdown mode provides output disconnect, enabling easy power management in battery powered systems. The RT8253A is available in a SOP-8 (Exposed Pad) package.

RT8253A技术特性
• ±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

RT8253A应用领域
• Industrial and Commercial Low Power Systems
• Set Top Box
• LCD Monitors and TVs
• Green Electronics/Appliances
• Point of Load Regulation of High Performance DSPs
• Wireless AP/Router