ML4903
ML4903 is High Current Synchronous Buck Controller manufactured by Micro Linear.
July 1999
ML4903 High Current Synchronous Buck Controller
GENERAL DESCRIPTION
The ML4903 high current synchronous buck controller provides high efficiency DC/DC conversion to generate VCCP for processors such as the Pentium® Pro and Pentium II from Intel®. The ML4903 controller, when bined with two external MOSFETs, generates output voltages between 1.8V and 3.5V from a 12V supply. The output voltage is selected via an internal 2 chord 4-bit DAC. In the upper range, the output can be set between 2.1V and 3.5V in 100mV steps. In the lower range, the output can be set between 1.8V and 2.05V in 50mV steps. Output currents in excess of 20A can be attained at efficiencies greater than 80%....
