LM2648 Two-Phase, Synchronous Step-Down 3-Channel Switching Regulator Controller
December 2004
LM2648 Two-Phase, Synchronous Step-Down 3-Channel Switching Regulator Controller
General Description
The LM2648 consists of two current mode and two
voltage mode synchronous buck regulator controllers providing 3 outputs at a switching frequency of 300kHz.
Each pair of 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 current mode regulator outputs operate as a dualphase, single output regulator for high current applications.
Current-mode feedback control on Channel 3...