RT2701 Datasheet | Richtek

® Dual-Phase PWM Controller for GPU Core Power Supply General Description The RT2701 is a dual-phase synchronous Buck PWM controller with integrated drivers which are optimized for high performance graphic microprocessor and puter applications. The IC integrates a PWM controller, two 12V MOSFET drivers with internal bootstrap diodes, as well as output current monitoring and protection functions into the WQFN-24L 4x4 package. The RT2701 adopts DCR and RDS(ON) current sensing. Over current protection is acplished through continuous inductor DCR current sensing, while RDS(ON) current sensing is used for accurate channel current balance. Using both methods of current sampling utilizes the best advantages of each technique. The RT2701 also Features an one-bit VID control operation in which the feedback voltage is regulated and tracks external input reference voltage. Other Features include adjustable operating frequency, external pensation and enable/shutdown functions. Ordering Information Package Type QW : WQFN-24L 4x4 (W-Type) (Exposed Pad-Option 1) Lead Plating System G : Green (Halogen Free and Pb Free) Note : Richtek products are : ` Ro HS pliant and patible with the current require- ments of IPC/JEDEC J-STD-020. ` Suitable for use in Sn Pb or Pb-free soldering processes. Features z Dual-Phase PWM Controller z Two Embedded MOSFET Drivers and Embedded Switching Boot Diode z Dynamic Auto Phase Control with Adjustable Threshold z Cross-talk Jitter Suspend (CJSTM) z Remote GND Detection for High Accuracy z Automatic Diode Emulation Mode/Or Ultrasonic Mode at Light Load z Lossless RDS(ON) Current Sensing for Current Balance z Lossless DCR Current Sensing for AVP & OCP z Reference Voltage Output with 1% Accuracy z External Reference Input with Soft-Start (RISS) z Embedded One-Bit VID Control z Adjustable OCP Threshold z Adjustable Switching Frequency z Reference Tracking UVP/OVP Protection z Shoot Through Protection and Short...