L6714TR STMicroelectronics

L6714 4 phase controller with embedded drivers for Intel VR10, VR11 and AMD 6Bit CPUs Features 0.5% output voltage accuracy 7/8 bit programmable output up to 1.60000V - Intel VR10.x, VR11 DAC 6 bit programmable output up to 1.5500V - AMD 6Bit DAC TQFP64 (Exposed Pad) High current integrated gate drivers Full differential current sensing across inductor or low side MOSFET Description Embedded VRD thermal monitor Integrated remote sense buffer L6714 implements a four phase step-down controller with 90 phase-shift between each Dynamic VID management phase with integrated high current drivers in a Adjustable reference voltage offset compact 10mm x 10mm body package with Programmable Soft-Start exposed pad. Low-Side-Less startup The device embeds selectable DACs: the output voltage ranges up to 1.60000V (both Intel VR10.x Programmable over voltage protection and VR11 DAC) or up to 1.5500V (AMD 6Bit Preliminary over voltage DAC) managing D-VID with 0.5% output voltage Constant over current protection accuracy over line and temperature variations. Additional programmable offset can be added to Oscillator internally fixed at 150kHz externally the reference voltage with a single external adjustable resistor. Output enable The controller assures fast protection against load SS END / PGOOD signal over current and under / over voltage (in this last TQFP64 10mm x 10mm package case also before UVLO). In case of over-current with Exposed Pad the system works in Constant Current mode until UVP. Application Selectable current reading adds flexibility to the High current VRD for desktop CPUs design allowing current sense across inductor or Workstation and server CPU power supply LS MOSFET. VRM modules System Thermal Monitor is also provided allowing system protection from over-temperature conditions. Order codes Part number Package Packaging L6714 TQFP64 Tube L6714TR TQFP64 Tape and reel November 2006 Rev 3 1/70 www.st.com 70 Obsolete Product(s) - Obsolete Product(s) Contents L6714 Contents 1 Block diagram 5 2 Pin settings 6 2.1 Connections 6 2.2 Functions 7 3 Electrical data . 13 3.1 Maximum rating 13 3.2 Thermal data 13 4 Electrical characteristics 14 5 VID Tables 17 5.1 Mapping for the Intel VR11 mode . 17 5.2 Voltage Identification (VID) for Intel VR11 mode . 17 5.3 Voltage Identifications (VID) for Intel VR10 mode + 6.25mV 19 5.4 Mapping for the AMD 6BIT mode . 21 5.5 Voltage identifications (VID) codes for AMD 6BIT mode . 21 6 Reference schematic . 23 7 Device description . 27 8 Configuring the device 28 8.1 DAC selection 28 9 Power dissipation 30 10 Current reading and current sharing loop 32 10.1 Low side current reading . 33 10.2 Inductor current reading 33 11 Remote voltage sense 35 2/70 Obsolete Product(s) - Obsolete Product(s)