Digitally Controlled Dual PWM with Embedded Drivers for VR12

The L6718 is a very compact, digitally controlled and cost effective dual controller designed to power Intel® VR12 processors. Dedicated pinstrapping is used to program the main parameters.

The device features from 2 to 4-phase programmable operation for the core section providing 2 embedded drivers. A single-phase with embedded driver and with independent control loop is used for GFX.

The L6718 supports power state transitions featuring VFDE and a programmable DPM, maintaining the best efficiency over all loading conditions without compromising transient response.

Second generation LTB Technologyallows a minimal cost output filter providing fast load transient response. The controller assures fast and independent protection against load overcurrent, under/overvoltage and feedback disconnections.

The device is available in VFQFPN56, 7x7 mm compact package with exposed pad.

Key Features

  • VR12 compliant with 25 MHz SVID bus rev. 1.5
  • Second generation LTB Technology™
  • Very compact dual controller:
    • Up to 4 phases for core section with 2 internal drivers
    • 1 phase for GFX section with internal driver
  • Input voltage up to 12 V
  • SMBus interface for power management
  • SWAP, Jmode, multi-rail only support
  • Programmable offset voltage
  • Single NTC design for TM, LL and IMON thermal compensation (for each section)
  • VFDE for efficiency optimization
  • DPM - dynamic phase management
  • Dual differential remote sense
  • 0.5% output voltage accuracy
  • Full-differential current sense across DCR
  • AVP - adaptive voltage positioning
  • Programmable switching frequency
  • Dual current monitor
  • Pre-biased output management
  • High-current embedded drivers optimized for 7 V operation
  • OC, OV, UV and FB disconnection protection
  • Dual VR_READY
  • VFQFPN56 7x7 mm package with exposed pad


Technical Documentation

Product Specifications
Description Version Size
DS9143 DS9143: Digitally controlled dual PWM with embedded drivers for VR12 processors 3.0 2 MB
Technical Notes & Articles
Description Version Size
TN1246 TN1246: Digital multi-phase constant-on-time regulator based on voltage controlled oscillator 1.0 499 KB

Publications and Collaterals

Description Version Size
Brochure Power management guide 05.2016 3 MB
Support & Community

Sample & Buy

Part Number Package Packing Type Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
L6718TR VFQFPN 56 7x7x1.0 Tape And Reel NRND - - NEC EAR99 - MORE INFO No availability reported, please contact our Sales office

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6718TR NRNDVFQFPN 56 7x7x1.0IndustrialEcopack2 0 0

(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.