L6756D Datasheet | STMicroelectronics

2/3/4 phase buck controller for VR10, VR11 and VR11.1 processor applications ..net Features - - - - - - - - - - - - - - - - LTB Technology® enhances load transient response 2 to 4 scalable phase operation Dual-edge asynchronous architecture PSI# input with programmable strategy Imon output Flexible driver support 7/8 bit programmable output - VR10/11.1 DAC 0.5% output voltage accuracy Full-differential current sense across DCR Integrated remote sense buffer Feedback disconnection protection Adjustable oscillator from 100 k Hz to 1 MHz LSLess startup to manage pre-biased output Programmable soft-start Threshold sensitive enable pin for VTT Sensing VFQFPN40 6x6 mm package VFQFPN40 6x6 mm Description L6756D is a two-to-four phase controller designed to power Intel’s most demanding processors and, most in general, low-voltage, high-current power supplies. The device Features LTB Technology® to provide the fastest response to load transients thus minimizing the output filter position. L6756D embeds selectable DAC: output voltage is programmable up to 1.6000 V (Intel VR10 and VR11.x DACs) managing DVID transitions with ±0.5% output voltage accuracy over line, load and temperature variations. The device assures fast protection against load over current and under / over voltage. Feedback disconnection prevents from damaging the load in case of misconnections in the system board. Low-side-less start-up allows soft-start over prebiased output avoiding dangerous current return through the main inductors as well as negative spike at the load side. L6756D is available in VFQFPN 6x6 mm package Applications - - - - High-current VRM / VRD for desktop / server / workstation CPUs Graphic cards Low-voltage, high-current power supplies High-density DC / DC converters Table 1. Device summary Order code Package VFQFPN40 VFQFPN40 Packing Tube Tape and reel L6756D L6756DTR October 2008 Rev 1 1/36 .st. 1 Contents Contents...