L6758A High performance (4+1) dual controller for the VR12 Datasheet - production data Applications High-current VRM / VRD for desktops / servers / workstations / new generation CPUs Description L6758A is a dual controller designed to power Intel VR12 processors: all required VFQFPN48 - 6x6 mm parameters are programmable through dedicated pinstrapping. The device features two-to-four phase Features programmable operation for multi-phase sections and a single-phase with independent control VR12 compliant with 25 MHz SVID bus rev 1.5 loops. Both sections feature second generation serialVID with programmable IMAX, TMAX, LTB Technology to provide fast load transient VBOOT, ADDRESS response, minimizing and optimizing the output Second generation LTB Technology filter composition. Dual controller: The L6758A supports power state transitions two-to-four phase for core featuring VFDE, programmable DPM and GDC, 1 phase for graphics (GFX) or system maintaining the best efficiency over all loading agent (VSA) conditions without compromising transient responses. The device assures fast and Single NTC design for TM, LL and IMON independent protection against load overcurrent, thermal compensation (for each section) under/overvoltage and feedback disconnections. VFDE and GDC - gate drive control for The device is available in VFQFPN48 package. efficiency optimization DPM - dynamic phase management Table 1. Device summary Dual remote sense Order code Package Packaging 0.5% output voltage accuracy L6758A VFQFPN48 6x6 mm Tray Fully-differential current sense across DCR Tape and AVP - adaptive voltage positioning L6758ATR VFQFPN48 6x6 mm reel Dual independent adjustable oscillator Dual current monitor Pre-biased output management 5 V supply, 12 V monitor Average and per-phase OC protection OV, UV and FB disconnection protection Dual VR RDY VFQFPN48 6x6 mm package July 2013 DocID023298 Rev 2 1/42 This is information on a product in full production. www.st.comContents L6758A Contents 1 Typical application circuit and block diagram 4 1.1 Application circuit 4 1.2 Block diagram . 5 2 Pin description and connection diagrams . 6 2.1 Pin description 6 2.2 Thermal data .11 3 Electrical specifications . 12 3.1 Absolute maximum ratings 12 3.2 Electrical characteristics 12 4 VR12 serial data bus and IC configuration 15 5 Device description and operation . 20 6 Output voltage positioning . 21 6.1 Multi-phase section: phase programming . 21 6.2 Multi-phase section: current reading and current sharing loop 22 6.3 Multi-phase section: defining load-line . 23 6.4 Multi-phase section: IMON information 23 6.5 Single-phase section: current reading . 24 6.6 Single-phase section: defining load-line 24 6.7 Dynamic VID transition support 25 6.8 DVID optimization: REF/SREF . 25 7 Output voltage monitoring and protection 27 7.1 Overvoltage . 27 7.2 Overcurrent . 28 7.2.1 Multi-phase section 28 7.2.2 Overcurrent and power states 29 7.2.3 Single-phase section . 29 2/42 DocID023298 Rev 2