12V Synchronous Buck PWM DC/DC Controller


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The RT8101/A are DC/DC synchronous buck PWM controllers with embedded driver support up to 12V + 12V boot-strapped voltage for high efficiency power driving. The parts are with full functions of voltage regulation, power monitoring and protection into a single small footprint packages SOP-8 and SOP-8 (Exposed Pad).
The RT8101/A apply a high-gain voltage mode PWM control for simple application design. An internal 0.8V reference allows the output voltage to be precisely regulated to low voltage requirement. The parts are proposed with two type including RT8101 and RT8101A with fixed operating frequency of 300kHz and 600kHz respectively. Based on the features that RT8101/A offered, the parts provide an optimum solution between efficiency, total B.O.M. count, and cost.


  • Graphic Card
  • Motherboard, Desktop Servers
  • IA Equipments
  • Telecomm Equipments
  • High Power DC/DC Regulators
Key Spec.
RT8101 RT8101A
Recommended Alternative  RT8120E/RT8120F RT8120E/RT8120F
Vs (typ) (V) 12 12
Vin (min) (V) 3.3 3.3
Vin (max) (V) 12 12
Vout (min) (V) 0.8 0.8
Vout (max) (V) 5 5
Output Adj. Method Resistor Resistor
Accuracy (+/- %) 1 1
Freq (typ) (kHz) 300.0 600.0
Iq (typ) (mA) 3 3
Ext Sync No No
Features Built-in Bootstrap Switch;Force PWM;OCP;SCP;UVP;Voltage Mode Control Built-in Bootstrap Switch;Force PWM;OCP;SCP;UVP;Voltage Mode Control
Package Type SOP-8;PSOP-8 SOP-8;PSOP-8
  • Single 12V Bias Supply
  • Drives All Low Cost N-MOSFETs
  • High-Gain Voltage Model PWM Control
  • 300kHz/600kHz Fixed Frequency Oscillator
  • Fast Transient Response :
      ♦ High-Speed GM Amplifier
      ♦ Full 0 to 100% Duty Ratio
      ♦ External Compensation in the Control Loop
  • Internal Soft-Start
  • Adaptive Non-Overlapping Gate Driver
  • Over Current Fault Monitor on MOSFET, No Current Sense Resistor Required
  • RoHS Compliant and 100% Lead (Pb)-Free
Title Last Update ShareDownload
12V Synchronous Buck PWM DC/DC Controller 2015/05/19