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The RT9703 is a low voltage, high performance single N-MOSFET power switch, designed for power rail on/off control with low RDS(ON) ≈ 80mΩ and full protection functions. The RT9703 equipped with a charge pump circuitry to drive the internal MOSFET switch and a flag output is available to indicate fault conditions against large di/dt which may cause the supply to fall out of regulation. In order to fit different application, an IP pin is offered for current limit point setting, a resistor from IP to ground sets the current limit for the switch.
Additional features include soft-start to limit inrush current during plug-in, thermal shutdown to prevent catastrophic switch failure from high-current loads, under-voltage lockout (UVLO) to ensure that the device remains off unless there is a valid input voltage present, a precision resistor-programmable output current limit up to 3.5A. Besides, the lower quiescent current as 30μA making this device ideal for portable battery-operated equipment.
The RT9703 is available in SOP-8 package requiring minimum board space and smallest components.
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  • Adjustable Current Limiting up to 3.5A
  • Built-In (Typically 80mΩ) N-MOSFET
  • Reverse Current Flow Blocking (no body diode) i.e. Output Can Be Forced Higher than Input (Off-State)
  • Low Supply Current :
      ♦ 30μA Typical at Switch on State
      ♦ Less than 1μA Typical at Switch Off State
  • Guaranteed 3A Continuous Load Current
  • Wide Input Voltage Ranges : 2V to 5.5V
  • Open-Drain Fault Flag Output
  • Hot Plug-In Application (Soft-Start)
  • 1.7V Typical Under-Voltage Lockout (UVLO)
  • Thermal Shutdown Protection
  • Smallest SOP-8 Package Minimizes Board Space
  • RoHS Compliant and 100% Lead (Pb)-Free
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LCD Monitor, LCD-TV<br />USB Power Module for ADSL<br />Information Appliance and Set-Top Box<br />Battery-Powered Equipment<br />Hot-Plug Power Supplies<br />ACPI Power Distribution<br />PCI Bus Power Switching<br />Motherboard &amp; Notebook PCs<br />PC Card Hot Swap Application</p>
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