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L6756D Datenblatt(PDF) 1 Page - STMicroelectronics |
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L6756D Datenblatt(HTML) 1 Page - STMicroelectronics |
1 / 36 page October 2008 Rev 1 1/36 1 L6756D 2/3/4 phase buck controller for VR10, VR11 and VR11.1 processor applications 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 kHz to 1 MHz ■ LSLess startup to manage pre-biased output ■ Programmable soft-start ■ Threshold sensitive enable pin for VTT Sensing ■ VFQFPN40 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 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 composition. 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 pre- biased 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 VFQFPN40 6x6 mm Table 1. Device summary Order code Package Packing L6756D VFQFPN40 Tube L6756DTR VFQFPN40 Tape and reel www.st.com |
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