5V to 12V Single Synchronous Buck PWM Controller


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The RT8108 series are single-phase synchronous buck PWM DC-DC controllers designed to drive two N-MOSFETs. They provide a highly accurate, programmable output voltage precisely regulated to low voltage requirement with an internal 0.6V or 0.8V reference.
The RT8108 series use a single feedback loop voltage mode PWM control for fast transient response. The high driving capability makes it suitable for large output current applications. An oscillator with fixed frequency 200kHz / 300kHz / 500kHz reduces the component size of the external inductor and capacitor for saving PCB board area and cost.
The RT8108 series integrate complete protection functions such as OCP, OVP and OTP UVP into SOP-8 and SOP-8 (Exposed Pad) surface mount packages.


  • Mother Boards and Desktop Servers
  • Graphic Cards
  • Switching Power Supply
  • Generic DC/DC Power Regulator
  • Motherboard
Key Spec.
Status Active
Vs (typ) (V) 12
Vin (min) (V) 3.3
Vin (max) (V) 12
Vout (min) (V) 0.6
Vout (max) (V) 5
Preset Vout (V)
Output Adj. Method Resistor
Accuracy (+/- %) 1
Freq (typ) (kHz) 200;300;500
Freq (min) (kHz) 200
Freq (max) (kHz) 500
Iq (typ) (mA) 2.5
Ext Sync No
Features Built-in Bootstrap Switch;OCP;OVP;SCP;UVP;Voltage Mode Control
Package Type PSOP-8;SOP-8
  • Single IC Supply Voltage ( 5V to 12V)
  • Drive Two N-MOSFETs
  • Fixed Operating Frequency at 200kHz, 300kHz and 500kHz
  • Voltage Mode PWM Control with External Feedback Loop Compensation
  • Over Current Protection by Sensing MOSFET RDS(ON)
  • Hardware Pin for On/Off Control
  • Full 0 to 90% Duty Cycle
  • Fast Transient Response
  • RoHS Compliant and Halogen Free
TitleLast UpdateShareDownload
5V to 12V Single Synchronous Buck PWM Controller2008/12/04
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT8108FGSPPSOP-82500 Not available