ICL351-LS
3-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 ICL351-LS, a 3-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 ICL351-LS 3-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 cur-
rent System VRM (SVRM) applications where small size, high efficiency, and low total BOM cost is critical.
Inductor Assembly Electrical Specifications
Parameter
Ls (1-6)
Ls (2-3)
Ls (4-5)
L
L
(1-6) short 2,3
L
L
(1-6) short 4,5
L
L
(2-3) short 4,5
DCR (1-6)
DCR (2-3)
Test Conditions
1.0 Vrms @ 500 kHz
1.0 Vrms @ 500 kHz
1.0 Vrms @ 500 kHz
1.0 Vrms @ 1MHz
1.0 Vrms @ 1MHz
1.0 Vrms @ 1MHz
25° C
25° C
Min
471
471
471
384
384
379
1.06
0.61
0.61
Typ
589
589
589
480
480
474
1.18
0.68
0.68
Max
707
707
707
576
576
569
1.3
0.75
Unit
nH
nH
nH
nH
nH
nH
mΩ
mΩ
DCR
(4-5)
25° C
0.75
mΩ
Specifications subject to change without notice.
Electrical specifications at 25˚C unless noted otherwise.
(12/09) ICL351-LS-1
ICE [ ICE COMPONENTS, INS. ]
