L6751 Datasheet, PDF (1/59 Pages) STMicroelectronics – Digitally controlled dual PWM for Intel VR12 and AMD SVI

L6751
Digitally controlled dual PWM for Intel VR12 and AMD SVI
Features
■ VR12 compliant with 25 MHz SVID bus rev. 1.5
– 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
■ WLPGA72 6x6 mm package
Applications
■ High-current VRM / VRD for desktop / server /
workstation Intel^® / AMD CPUs
■ DDR3 memory supply
Datasheet − production data
WPLGA72 6x6 mm
Description
The L6751 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 multi-phase sections and a single-phase with
independent control loops. When configured for
memory supply, single-phase (VTT) reference is
always tracking multi-phase (VDDQ) scaled by a
factor of 2. The L6751 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 WLPGA72 6x6 mm
package.
Table 1. Device summary
Order code
Package
L6751
WPLGA72 6x6 mm
L6751TR WPLGA72 6x 6mm
Packaging
Tray
Tape and reel
November 2012
This is information on a product in full production.
Doc ID 023992 Rev 1
1/59
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