LM2647 Datasheet | National Semiconductor

Dual Synchronous Buck Regulator Controller June 2003 LM2647 Dual Synchronous Buck Regulator Controller General Description The LM2647 is an adjustable 200-500kHz dual channel voltage-mode controlled high-speed synchronous buck regulator controller ideally suited for battery powered applications such as laptop and notebook puters. The LM2647 requires only N-channel FETs for both the upper and lower positions of each synchronous stage. It Features line feedforward to improve the response to input transients. At very light loads, the user can choose between the highefficiency Pulse-skip mode or the constant frequency Forced-PWM mode. Lossless current limiting without the use of external...