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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 RT7272B integrates a 150m&Omega; on-resistance of high-side MOSFET and an 80m&Omega; on-resistance of low-side MOSFET to achieve high conversion efficiency up to 95%. The current mode control architecture supports fast transient response and simple compensation circuit.<br />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 undervoltage lockout, output undervoltage protection, overcurrent protection and over-temperature protection.<br />The RT7272B is available in the thermal enhanced SOP-8 (Exposed Pad) package.
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  • 4.5V to 36V Input Voltage Range
  • 3A Output Current
  • Internal N-MOSFETs
  • Current Mode Control
  • Fixed Switching 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 Undervoltage Lockout
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  • Over-Temperature Protection
  • Adjustable Current Limit
  • Power Saving Mode for High Efficiency at Light Load
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Distributed Power Systems<br />Pre-Regulator for Linear Regulators<br />Notebook Computers<br />Point of Load Regulator in Distributed Power System<br />Digital Set-Top Boxes<br />Personal Digital Recorders<br />Broadband Communications<br />Flat Panel TVs and Monitors<br />Vehicle Electronics
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