ISL6559EVAL2 Intersil, ISL6559EVAL2 Datasheet - Page 6

• Manufacturer Part Number: ISL6559EVAL2
• Description: EVALUATION BOARD 2 ISL6559
• Manufacturer: Intersil

Specifications of ISL6559EVAL2

• Main Purpose: Special Purpose DC/DC, VRM Supply
• Outputs And Type: 1, Non-Isolated
• Power - Output: 67.6W
• Voltage - Output: 1.3V
• Current - Output: 52A
• Voltage - Input: 5V, 12V
• Regulator Topology: Buck
• Frequency - Switching: 250kHz
• Board Type: Fully Populated
• Utilized Ic / Part: HIP6601, ISL6559
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Adapting Circuit Performance
This design represents one solution for meeting the present
requirements on voltage regulators powering AMD Hammer
Family processors. This low cost approach can be
augmented to meet changing performance and cost
requirements. Over the life of the processor, some features
could be enhanced, resulting in higher processor quiescent
or transient current specifications. Given suitable
motherboard space and component selection, this design
can support 20A per phase or more if required. With the
flexibility to support 2, 3, or 4 phases, the ISL6559 controller
covers an array of future designs.
If the cost curve of a design must be tilted lower, a different
combination of upper and lower MOSFETs with higher
r
reduced efficiency and thermal performance.
In cases where efficiency is paramount, a lower r
synchronous MOSFET or pair of MOSFETs can achieve
efficiencies over 90%.
If board area is a premium, the ISL6559 switching frequency
can be raised to reduce solution size. MOSFET technology
continues to drive die size down and new packaging options
provide improved thermal performance in smaller packages.
Implementing designs with 20A per channel or less typically
occupy the least amount of board space.
DS(ON)
can be employed. The trade-off for lowering cost is
6
DS(ON)
Application Note 1137
Summary
The ISL6559EVAL2 is an adaptable evaluation tool which
showcases the performance of the ISL6559 and HIP6601B
chip set. Designed to meet the performance requirements of
AMD’s Hammer Family Desktop microprocessors, the board
allows the user the flexibility to configure the board for
contemporary, as well as future, microprocessor offerings.
The following pages provide a schematic of the board, bill of
materials and layout drawings to support implementation of
this solution.
References
Intersil documents are available on the web at
http://www.intersil.com/
[1] ISL6559 Data Sheet, Intersil Corporation, File No.
FN9084
[2] ISL6601B Data Sheet, Intersil Corporation, File No.
FN9072
[3] ISL6602B Data Sheet, Intersil Corporation, File No.
FN9076