The LM27262 is a versatile synchronous buck voltage regulator controller designed according to the Intel VRD10 Specification. It's a fixed-frequency voltage-mode control PWM with average current modulation of the reference voltage to achieve the desired output impedance. This approach imparts a pseudo current mode behavior to the control loop. The part provides the control for a voltage regulator consisting of either 2-, 3- or 4-phases to provide power to a desktop CPU. Pulse-by-pulse phase current balancing ensures accurate current sharing. CPU core currents of over 90A can be supported without requiring significant over design of the power path. The LM27262 contains a precision 6-bit digitalto-analog converter (DAC) that uses a VID-code provided by the CPU to program the desired CPU core voltage. The regulator output voltage can be dynamically adjusted by changing the VID-code "on the fly". The part is intended to provide all the specified functions laid out in the VRD-10 specification, making it as simple as possible for the user to realize a fully compliant CPU core supply for Intel's PentiumTM4 and PrescottTM processors. The LM27262 is available in a 48-lead TSSOP package and in a 48-lead LLP package.