ICL551-1 5-Phase VRD/POL Inductor Applications •VRDs (Imbedded) •VRMs (Module) •POLs •VRM 10.x / VRM11 based designs •DDR2/3 memory Features •Design for use with IKOR’s proprietary coupled inductor multi-phase DC-DC converter topology •Low height and small size allows use in both imbedded (VRD) and module (VRM) applications •Integrated design lowers cost and simplifies assembly The ICL551-1, a 5-phase inductor assembly using IKOR’s coupled inductor technology, solves the most pressing problem facing IA-32 VRDs. This patented technology solves the trade-off between efficiency and elimination of bulk capacitors by dramatically lowering the VRM output inductance while using industry-standard components and relatively low switching frequencies. This technology provides superior transient response performance to higher frequency solutions due to the unique method of coupling between phases, and enables high-current designs with little or no electrolytic output bypass capacitance. The ICL551-1 5-phase coupled inductor assembly is designed for VRD applications. Its integrated design allows it to fit the inductors very close to the CPU socket in VRD applications. This device can also be used in high current System VRM (SVRM) applications where small size, high efficiency, and low total BOM cost is critical. Single Inductor Electrical Specifications Parameter Test Conditions Min Typ Ls 1.0 Vrms @ 500 kHz 264 330 LL 1.0 Vrms @ 500 kHz 45 Max Unit 396 nH 53 nH Inductor Assembly Electrical Specifications Parameter Test Conditions Min Typ Ls (1-3) 1.0 Vrms @ 500 kHz 528 660 792 nH Ls (2-5) 1.0 Vrms @ 500 kHz 528 660 792 nH Ls (4-7) 1.0 Vrms @ 500 kHz 528 660 792 nH Ls (6-9) 1.0 Vrms @ 500 kHz 528 660 792 nH Ls (8-10) 1.0 Vrms @ 500 kHz 528 660 792 nH DCR (1-3) 25° C .387 .43 .473 mΩ DCR (2-5) 25° C .477 .53 .583 mΩ DCR (4-7) 25° C .477 .53 .583 mΩ DCR (6-9) 25° C .477 .53 .583 mΩ DCR (8-10) 25° C .387 .43 .473 mΩ Specifications subject to change without notice. 800.729.2099 tel www.icecomponents.com Max Unit 28 (03/08) ICL551-1-1 ICL551-1 5-Phase VRD/POL Inductor Inductor Assembly units: mm Front View Top View 63.5 +/- 0.254 IKOR ICL551-1 YYWW 10.2 +/- 0.254 1 10 8.89 5.08 dia 1.3(x10) 21.59 Side View Schematic 10.16+/-0.25 8.5 max 6.1 Single Inductor 1 1 3 2 3 2 5 4 5 4 7 6 7 6 9 8 9 8 Layout 1 2 5.08(x5) 3 4 5 6 7 8 9 10 7.62(x4) 1010 units: mm Application Schematic SINGLE INDUCTOR The technology utilized in conjunction with the coupled inductor (“the CL”) described in this data sheet includes intellectual property (the “IP”) owned by iWatt, Inc. and is covered by one or more of the following U.S. patents: 6,545,450; 6,686,727; 6,696,823. In connection with the end customer’s purchase of the CL from “ICE Components, Inc.”, the end customer is hereby granted a non-exclusive, worldwide, royalty-free license (without rights to sublicense) to use and incorporate the IP in the end customer’s product that also incorporates the CL. In no way does this license extend to customer end products which do not incorporate the CL to implement the IP. Specifications subject to change without notice. 800.729.2099 tel www.icecomponents.com 29 (03/08) ICL551-1-2