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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.

Applications

  • LCD Monitor, LCD-TV
  • USB Power Module for ADSL
  • Information Appliance and Set-Top Box
  • Battery-Powered Equipment
  • Hot-Plug Power Supplies
  • ACPI Power Distribution
  • PCI Bus Power Switching
  • Motherboard & Notebook PCs
  • PC Card Hot Swap Application

Key Spec.
RT9703
Status Active
Number of Outputs 1
Vin (min) (V) 2
Vin (max) (V) 5.5
Ron (typ) (mOhm) 80
Iq (typ) (mA) 0.03
FLAG Indicator Yes
Iocp Adjustable Yes
Switch Type Power Switch
Features Adjustable Current Limit;Cycle-by-Cycle Current Limit;Enable Input;SCP
Package Type SOP-8
Features
  • 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

Part NumberPackage TypePackage Qty.Free SampleDistributorStockBuy From Authorized Distributor
RT9703GSSOP-82,500 Request Digikey 692 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
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