L6751B Datasheet, PDF (1/58 Pages) STMicroelectronics – Digitally controlled dual PWM for Intel VR12 and AMD SVI

L6751B
Digitally controlled dual PWM for Intel VR12 and AMD SVI
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
Datasheet − production data
QFN68 8x8 mm
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
L6751B
L6751BTR
VFQFPN68 8x8 mm
Packaging
Tray
Tape and reel
December 2012
This is information on a product in full production.
Doc ID 024028 Rev 1
1/58
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