managing power electronics vlsi and dsp driven computer systems nov 2005 phần 6

, một liều thuốc tốt của kỹ thuật số là cần thiết cho truyền thông và hội đồng quản trị trình độ thiết kế. Các kỹ thuật số của năng lượng đang tiến triển trong các lĩnh vực này tại các tốc độ khác nhau, gây nhầm lẫn kế Chip điện kỹ thuật số | 184 Chapter 7 Computing and Communications Systems Table 7-1 DDR Regulator BOM for a 4 A continuous 6 A Peak VDDQ Application Description Ref. Vendor Part Number Capacitor 68 pF Tantalum 25 V ESR150 mQ 1 C1 AVX TPSV686 025 0150 Capacitor 10 nF Ceramic 2 C2 C3 Any Capacitor 68 pF Tantalum 6 V mQ 1 C4 AVX TAJB686 006 Capacitor 150 nF Ceramic 2 05 C7 Any Capacitor 180 pF Specialty Polymer 4 V ESR15 mQ 2 C6A C6B Panasonic EEFUE0G181R Capacitor 10 008 pF Specialty Polymer 4 V ESR 10 mQ 1 C8 Kemet T510E108 1 004AS4115 Capacitor pF Ceramic 1 C9 Any kQ1 Resistor 3 R6 Any kil 1 Resistor 1 R3 Any 10 kQ 5 Resistor 1 R4 Any kQ 1 Resistor 1 R5 Any kQ 1 Resistor 2 R7 R8 Any Schottky Diode 30 V 2 D1 D2 Fairchild DAT54 Inductor pH 6 A mQ 1 L1 Panasonic ETQ-P6F6R4HFA Inductor pH 6 A mQ 1 L2 Panasonic ETQ-P6F0R8LFA Dual MOSFET with Schottky 2 01 02 Fairchild FDS6986S DDR Controller 1 U1 Fairchild FAN5236 Power Management of Digital Set-Top Boxes 185 Future Trends As has been the trend for many years customers will demand more and more memory to run their ever larger software applications. Systems such as the Intel boards for servers are already being designed with large amounts of DDR memory some systems contain as much as 16 GB. DDR s decreased power requirements may still not be adequate to power such systems hence the move toward DDR2 memory technologies. While we are just at the beginning of the DDR2 cycle the industry is already buzzing about the next generation memory technology for PCs DDR3 memories which are not expected to reach the market until 2007 or later. Power Management of Digital Set-Top Boxes The Digital Set-Top Box DSTB market is one of the fastest growing applications for semiconductors. The market in millions of units is bigger and is expanding faster than the notebook market offering tremendous opportunities for digital and analog semiconductor manufacturers. In this section we will focus on the power .