Overview
The L6751B is a universal digitally controlled dual PWM DC-DC converter designed by STMicroelectronics to power Intel’s VR12 and AMD SVI processors and memories. This device allows for the programming of all required parameters through dedicated pinstrapping and the PMBus interface. It features up to 6-phase programmable operation for the multi-phase section and a single-phase with independent control loops, making it versatile for various power management needs.
Key Specifications
| Parameter | Description |
|---|---|
| Package | VFQFPN68 8x8 mm |
| Number of Phases | Up to 6 phases for CORE and memory, 1 phase for graphics (GFX), system agent (VSA), or Northbridge (VDDNB) |
| Compliance | VR12 compliant with 25 MHz SVID bus rev1.5, AMD SVI compliant |
| Interface | PMBus, SerialVID with programmable IMAX, TMAX, VBOOT, ADDRESS |
| Thermal Compensation | Single NTC design for TM, LL, and Imon thermal compensation for each section |
| Efficiency Optimization | VFDE and GDC - gate drive control, DPM - dynamic phase management |
| Voltage Accuracy | 0.5% Vout accuracy, dual remote sense |
| Protection Features | Average and per-phase OC protection, OV, UV, and FB disconnection protection |
| Oscillator | Dual independent adjustable oscillator |
| Current Monitoring | Dual current monitor |
Key Features
- Flexible driver/DrMOS support
- JMode support
- Fully configurable through PMBus
- Second generation LTB Technology
- AVP - adaptive voltage positioning
- Full-differential current sense across DCR
- Pre-biased output management
- Dual VR_RDY
Applications
The L6751B is designed to power Intel’s VR12 and AMD SVI processors and memories, making it suitable for high-performance computing systems, servers, and other applications requiring advanced power management.
Q & A
- What is the L6751B used for? The L6751B is used to power Intel’s VR12 and AMD SVI processors and memories.
- What interface does the L6751B support? The L6751B supports PMBus and SerialVID interfaces.
- How many phases does the L6751B support? The L6751B supports up to 6 phases for CORE and memory, and 1 phase for graphics (GFX), system agent (VSA), or Northbridge (VDDNB).
- What is the package type of the L6751B? The L6751B is available in a VFQFPN68 8x8 mm package.
- Does the L6751B support thermal compensation? Yes, the L6751B features a single NTC design for TM, LL, and Imon thermal compensation for each section.
- What protection features does the L6751B have? The L6751B includes average and per-phase OC protection, OV, UV, and FB disconnection protection.
- Is the L6751B compliant with any specific standards? Yes, it is VR12 compliant with 25 MHz SVID bus rev1.5 and AMD SVI compliant.
- Does the L6751B support dynamic phase management? Yes, the L6751B supports DPM (dynamic phase management).
- What is the voltage accuracy of the L6751B? The L6751B has a 0.5% Vout accuracy with dual remote sense.
- Does the L6751B have current monitoring capabilities? Yes, the L6751B features dual current monitors.
