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L6718：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 Technology^™allows 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

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