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L6751B Datasheet(PDF) 1 Page - STMicroelectronics |
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L6751B Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 58 page  This is information on a product in full production. December 2012 Doc ID 024028 Rev 1 1/58 58 L6751B Digitally controlled dual PWM for Intel VR12 and AMD SVI Datasheet − production data Features ■ VR12 compliant with 25 MHz SVID bus rev1.5 – SerialVID with programmable IMAX, TMAX, VBOOT, ADDRESS ■ AMD SVI compliant ■ Second generation LTB Technology® ■ Flexible driver/DrMOS support ■ JMode support ■ Fully configurable through PMBus™ ■ Dual controller: – up to 6 phases for CORE and memory – 1 phase for graphics (GFX), system agent (VSA) or Northbridge (VDDNB) ■ Single NTC design for TM, LL and Imon thermal compensation (for each section) ■ VFDE and GDC - gate drive control for efficiency optimization ■ DPM - dynamic phase management ■ Dual remote sense; 0.5% Vout accuracy ■ Full-differential current sense across DCR ■ AVP - adaptive voltage positioning ■ Dual independent adjustable oscillator ■ Dual current monitor ■ Pre-biased output management ■ Average and per-phase OC protection ■ OV, UV and FB disconnection protection ■ Dual VR_RDY ■ VFQFPN68 8x8 mm package Applications ■ High-current VRM / VRD for desktop / server / workstation Intel / AMD CPUs ■ DDR3 memory supply Description The L6751B is a universal digitally controlled dual PWM DC-DC designed to power Intel’s VR12 and AMD SVI processors and memories: all required parameters are programmable through dedicated pinstrapping and PMBus interface. The device features up to 6-phase programmable operation for the multi-phase section and a single- phase with independent control loops. When configured for memory supply, single-phase (VTT) reference is always tracking multi-phases (VDDQ) scaled by a factor of 2. The L6751B supports power state transitions featuring VFDE, programmable DPM and GDC maintaining the best efficiency over all loading conditions without compromising transient response. The device assures fast and independent protection against load overcurrent, under/overvoltage and feedback disconnections. The device is available in VFQFPN68 8x8 mm package. Table 1. Device summary Order code Package Packaging L6751B VFQFPN68 8x8 mm Tray L6751BTR Tape and reel QFN68 8x8 mm www.st.com |
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