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The RT7257J 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 RT7257J's current mode architecture and external compensation allow the transient response to be optimized over a wide input voltage range and loads. Cycle-by-cycle current limit provides protection against shorted outputs, and soft-start eliminates input current surge during start-up. The RT7257J also provides under voltage protection and thermal shutdown protection. The low current (<3μA) shutdown mode provides output disconnection, enabling easy power management in battery-powered systems. The RT7257J is available in an SOP-8 (Exposed Pad) package.
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  • ±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 : 340kHz
  • Output Adjustable from 0.8V to 15V
  • Stable with Low ESR Ceramic Output Capacitors
  • Up to 95% Efficiency
  • Programmable Soft-Start
  • Cycle-by-Cycle Over Current Protection
  • Input Under Voltage Lockout
  • Output Under Voltage Protection
  • Thermal Shutdown Protection
  • RoHS Compliant and Halogen Free
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Wireless AP/Router<br />Set-Top-Box<br />Industrial and Commercial Low Power Systems<br />LCD Monitors and TVs<br />Green Electronics/Appliances<br />Point of Load Regulation of High-Performance DSPs
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