ICL422-1

ICL422-1 4-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 • Suitable for high temperature RoHS reflow processes The ICL422-1, a 4-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 ICL422-1 4-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 Ls LL Test Conditions 1.0 Vrms @ 500 kHz 1.0 Vrms @ 500 kHz Min 124 162 Typ 146 180 Max 168 Unit nH nH 198 Inductor Assembly Electrical Specifications Parameter Ls (1-3) Ls (2-5) Ls (4-7) Ls (6-8) DCR (1-3) DCR (2-5) DCR (4-7) DCR (6-8) Specifications subject to change without notice. Electrical specifications at 25˚C unless noted otherwise. Test Conditions 1.0 Vrms @ 500 kHz 1.0 Vrms @ 500 kHz 1.0 Vrms @ 500 kHz 1.0 Vrms @ 500 kHz Min 248 248 248 248 .387 .477 .477 .387 Typ 310 310 310 310 .43 .53 .53 .43 Max 372 372 372 372 Unit nH nH nH nH 25° C 25° C 25° C 25° C .473 .583 .583 .473 mΩ mΩ mΩ mΩ (07/11) ICL422-1-1 ICL422-1 VRD/POL Inductor VRD/POL Inductor • Inductor Assembly Front View 4.0 +/- 0.25 8.7 max ICL451-1 units: mm Top View 50.8 +/- 0.254 IKOR 1 5.08 21.59 8.89 dia 1.3(x8) ICL451-1H YYWW TOP VIEW ice 10.2 +/- 0.254 8 Side View Schematic Schematic 1 Layout Footprint 1 2 3 4 5 6 7 8 0.25 min 3 2 5 4 5.08(x4) 7.62(x3) 3.0 +/- 0.25 6.8 typ. 7 6 • Single Inductor Application Schematic PHASE 1 PHASE 2 8 units: mm 1 4 3 2 VOUT PHASE 3 SINGLE INDUCTOR PHASE 4 5 7 8 6 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 (07/11) ICL422-1-2