Triple Linear Regulator Controllers


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The RT9174 is a triple linear regulator controller designed for motherboard application.
The regulators are intended to regulate the computer system AGP (2X/4X) power, the 2.5V clock power, and the 1.8V power for North/South Bridge core voltage and/or cache memory circuits. All controllers can drive NPN or NMOSFET pass transistor. A special scheme employing driver voltage could be higher than VDD when driving NMOSFET through the 12V power.
The RT9174 future a small SOP-8 package for saving board area. It also builds in current limiting and thermal shutdown protection function.


Key Spec.
Status Active
Vin (min) (V) 3
Vin (max) (V) 8
Number of Outputs 3
Vout (min) (V) 0.8
Vout (max) (V) 7
Output Adj. Method Resistor
Accuracy (+/- %) 2.5
Iout (max) (A) 5
Iq (typ) (mA) 800
Cout (min) (uF) 470
Cout Type Electrolytic
Features OCP
Package Type SOP-8
  • Integrated Three Linear Controllers in a SOP-8 Package
  • Driving NPN or NMOSFET
  • Sourcing ( > 100mA) and Sinking ( > 5mA) Driver
  • Tri-State Output Driver
  • Low Internal 0.8V Reference
  • Adjustable Output Voltage Setting
  • High Output Stability
  • VDDQ 1.5/3.3V Automatic Changing for AGP
  • Wide 3V to 8V Input Voltage Range
  • Current Limiting and Thermal Protection
  • RoHS Compliant and 100% Lead (Pb)-Free
TitleLast UpdateShareDownload
Triple Linear Regulator Controllers2003/12/31
Title Last Update ShareDownload
Triple Linear Regulator Controllers 2015/05/19