RT7272BGSP

The RT7272B is a high efficiency, current mode synchronous step-down DC/DC converter that can deliver up to 3A output current over a wide input voltage range from 4.5V to 36V. The device integrates a 150mΩ high side and a 80mΩ low side MOSFET to achieve high conversion efficiency up to 95%. The current mode control architecture supports fast transient response and simple compensation circuit. A cycle-by-cycle current limit function provides protection against shorted output and an internal soft-start eliminates input current surge during start-up. The RT7272B provides complete protection functions such as input under-voltage lockout, output under-voltage protection, over-current protection and thermal shutdown. The RT7272B is available in the thermal enhanced SOP-8 (Exposed Pad) package.

Applications

• Distributed Power Systems
• Pre-Regulator for Linear Regulators
• Notebook Computers
• Point of Load Regulator in Distributed Power System
• Digital Set-top Boxes
• Personal Digital Recorders
• Broadband Communications
• Flat Panel TVs and Monitors
• Vehicle Electronics

Key features

• 4.5V to 36V Input Voltage Range
• 3A Output Current
• Internal N-MOSFETs
• Current Mode Control
• Fixed Frequency Operation: 500kHz
• Adjustable Output Voltage from 0.8V to 30V
• High Efficiency Up to 95%
• Stable with Low ESR Ceramic Output Capacitors
• Cycle-by-Cycle Current Limit
• Input Under-Voltage Lockout
• Output Under-Voltage Protection
• Thermal Shutdown Protection
• Adjustable Current Limit
• Power Saving Mode for High Efficiency at Light Load
• RoHS Compliant and Halogen Free