L6711TR STMicroelectronics

L6711 3 Phase controller with dynamic VID and selectable DACs Features 2A integrated gate drivers Fully differential current reading across inductor or LS MOSFET 0.5% Output voltage accuracy 6 bit programmable output from 0.8185V to TQFP48 (Exposed Pad) 1.5810V in 12.5mV steps 5 bit programmable output from 0.800V to 1.550V in 25mV steps Description Dynamic VID management The device implements a three phase step-down Adjustable reference voltage offset controller with a 120 phase-shift between each 3% active current sharing accuracy phase with integrated high current drivers in a Digital 2048 step soft-start compact 7x7mm body package with exposed pad. Programmable over voltage protection The device embeds selectable DAC: the output voltage ranges from 0.8185V to 1.5810V with Integrated temperature sensor 12.5mV steps (VID SEL = OPEN) or from 0.800V Constant over current protection to 1.550V with 25mV steps (VID SEL = GND Oscillator internally fixed at 150kHz (450kHz VID5 drives an optional +25mV offset) managing ripple) externally adjustable dynamic VID with 0.5% accuracy over line and temp variations. Additional programmable offset Output enable can be added to the voltage reference with a Integrated remote sense buffer single external resistor. TQFP48 7x7 Package with exposed pad The device assures a fast protection against load over current and load over/under voltage. An internal crowbar is provided turning on the low side mosfet if an over-voltage is detected. Applications In case of over-current, the system works in High current VRM/VRD for desktop / Server / Constant Current mode until UVP. Workstation CPUs Selectable current reading adds flexibility in High density DC/DC Converters system design. Order codes Part Number Package Packing L6711 TQFP48 Tube L6711TR TQFP48 Tape & Reel April 2006 Rev 4 1/50 www.st.com 50 Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) Contents L6711 Contents 1 Typical application circuit and block diagram 4 1.1 Application circuit 4 1.2 Block diagram . 6 2 Pins description and connection diagrams 7 2.1 Pin descriptions . 7 3 Maximum ratings . 12 3.1 Absolute maximum ratings 12 3.2 Thermal data 12 4 Electrical specifications . 13 5 VID Tables 16 6 Device description . 18 7 Current reading and current sharing control loop 19 7.1 Low-side current reading . 19 7.2 Inductor current reading 20 8 DAC Selection . 22 9 Remote voltage sense 23 10 Voltage positioning . 24 10.1 Droop function . 24 10.2 Offset 25 10.3 Integrated thermal sensor 26 11 Dynamic VID transitions . 28 11.1 VID SEL = OPEN . 29 11.2 VID SEL = GND 30 2/50 Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)