LM2642
LM2642 is Two-Phase Synchronous Step-Down Switching Controller manufactured by National Semiconductor.
LM2642 Two-Phase Synchronous Step-Down Switching Controller
May 2003
LM2642 Two-Phase Synchronous Step-Down Switching Controller
General Description
The LM2642 consists of two current mode synchronous buck regulator controllers with a switching frequency of 300kHz. The two switching regulator controllers operate 180˚ out of phase. This feature reduces the input ripple RMS current, thereby significantly reducing the required input capacitance. The two switching regulator outputs can also be paralleled to operate as a dual-phase single output regulator. The output of each channel can be independently adjusted from 1.3 to VIN
- maximum duty cycle. An internal 5V rail is also available...
