RT8109应用电路及参数资料

RT8109应用电路及参数资料

The RT8109 is a single-phase synchronous buck PWM DC-DC controller designed to drive two N-MOSFETs. It provides a highly accurate, programmable output voltage precisely regulated to low voltage requirement with an internal 0.6V ±1% reference.
The RT8109 uses 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 300kHz reduces the component size of the external inductor and capacitor for saving PCB board area and cost.
The RT8109 supports both tracking and stand-alone loop control modes. Standalone mode is simple and tracking mode provides better flexibility. The RT8109 also integrates complete protection functions such as OCP, OVP, UVP into WDFN-10L 3x3 package.

Features

• Single IC Supply Voltage ( 5V to 12V).
• Drive Two N-MOSFETs
• Fixed Operating Frequency at 300kHz
• Voltage Mode PWM Control with External Feedback Loop Compensation
• Over Current Protection by Sensing MOSFET RDS(ON)
• Dual Mode Regulation Control
► Standalone Mode (FB regulating to close to internal reference 0.6V)
► Tracking Mode (FB following PI input)
• Power Good Indication
• On/Off Control
• Full 0 to 90% Duty Cycle
• RoHS Compliant and Halgen Free 

Application

• Mother Boards and Desktop Servers
• Graphic Cards
• Switching Power Supply
• Generic DC/DC Power Regulator

Typical Applications Circuit

RT8109产品规格书