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The RT8105A is a synchronous buck PWM controller with embedded MOSFET gate drivers. This part operates with 5V/12V supply voltage, has fixed 300kHz switching frequency, and utilizes voltage mode control. The feedback control loop is compensated internally to simplify the converter design.
The RT8105A provides enable/disable function to support power sequence control. This device also provides full fault protection functions to protect the load. This part uses lossless low side MOSFET RDS(ON) current sense technique for over current protection with adjustable threshold. Other features include internal soft-start and VIN detection function.

Applications

  • Graphic Card
  • Motherboard
  • IA Equipment
  • Telecomm Equipment
  • Mid-Power DC/DC Regulator
Key Spec.
RT8105A
Status NRND
Recommended Alternative  RT8120E/RT8120F
Vs (typ) (V) 12;5
Vin (min) (V) 5
Vin (max) (V) 12
Vout (min) (V) 0.8
Vout (max) (V) 5
Output Adj. Method Resistor
Accuracy (+/- %) 2
Freq (typ) (kHz) 300
Iq (typ) (mA) 4
Ext Sync No
Features Force PWM;OCP;OVP;SCP;UVP;Voltage Mode Control
Package Type SOP-8
Features
  • 5V or 12V Supply Voltage
  • Embedded Non-Overlapping N-MOSFET Driver
  • 300kHz Fixed Switching Frequency
  • Internal Control Loop Compensation
  • Enable/Disable Control
  • Full 0 to 100% Duty Ratio
  • Low Side MOSFET RDS(ON) Current Sense
  • Adjustable Over Current Protection with Improved Noise Immunity
  • Full-Time Over Voltage Protection
  • Fast Transient Response
  • Internal Soft-Start
  • RoHS Compliant and Halogen Free
Please confirm with our distributor or sales representative for actual stock status.
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