MAX17511

MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T 19-5742; Rev 1; 7/11 EVAALVUAAILTAIOBNLEKIT Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 General Description The MAX17411/MAX17511/MAX17511C/MAX17511N/ MAX17511T are dual-output, step-down, constant on-time Quick-PWMK controllers for VR12/IMVP-7 CPU core supplies. The controllers consist of two high-current switching power supplies for CPU and GFX cores. The CPU regulator (regulator A) is a three-phase constant on-time architecture. The GFX regulator (regulator B) is also constant on-time architecture. The MAX17411 supports 2-phase operation and the MAX17511/MAX17511C/MAX17511N/MAX17511T support 1-phase operation. The MAX17411/MAX17511/ MAX17511C/MAX17511N/MAX17511T include two internal drivers on regulator A and one internal driver on regulator B. External drivers such as the MAX17491 enable the additional phases. Both regulator A and regulator B include output voltage sensing and accurate load-line gain. Switching frequencies are programmable from 200kHz to 600kHz per phase. Output overvoltage protection (OVP, MAX17411/ MAX17511/MAX17511C/MAX17511N), undervoltage protection (UVP), and thermal protection ensure effective and reliable operation. When any of these protection features detect a fault, the controller shuts down both outputs. The multiphase regulators include transient-phase overlap and active overshoot suppression, which speed up the response time and reduce the total output capacit...