ISL6559EVAL2 Intersil, ISL6559EVAL2 Datasheet

ISL6559EVAL2

Manufacturer Part Number

ISL6559EVAL2

Description

EVALUATION BOARD 2 ISL6559

Manufacturer

Intersil

Datasheets

1.ISL6559CBZ-T.pdf (21 pages)

2.ISL6559EVAL2.pdf (12 pages)

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

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Introduction

The AMD Hammer family microprocessors feature higher

clock speeds and greater device density than previous

product families. The power management solution for this

next generation family of microprocessors must contend with

lower core voltages, tighter transient specifications, and

higher peak current demands. Responding to the changing

power management needs of its customers, Intersil

introduces the ISL6559 controller to power the AMD

Hammer family of microprocessors.

Intersil ISL6559 and HIP6601B

The ISL6559EVAL2 is a versatile voltage regulator-down

(VRD) design. The evaluation board comes configured for

3-phase buck operation, designed to meet AMD Hammer

Family Desktop Processor specifications. The board layout

supports removal of the third phase to support evaluation at

lower current specifications. The ISL6559 controller features

are specifically designed to compliment and support the

Hammer Family processors. Interfaced with HIP6601B

drivers, the chipset forms a highly integrated solution for

AMD Hammer processor applications.

The ISL6559 regulates output voltage and balances load

currents for two to four synchronous buck converter

channels. The controller features a 5-bit DAC, which

provides a digital interface for accurate step down

conversion over the entire Hammer Family range of 1.550V

to 0.800V. New multi-phase family features include

differential remote output voltage sensing, to improve

regulation tolerance; pin-adjustable reference offset, for

ease of implementation; VID-on-the-Fly, to respond to DAC

changes during operation; and optional load line regulation.

For a more detailed description of the ISL6559 functionality,

refer to the data sheet [1].

The HIP6601B driver is chosen to drive two N-Channel

power MOSFETs in a synchronous-rectified buck converter

channel. Each channel has a single logic input that controls

the upper and lower MOSFETs. Dead time is optimized on

both switching edges to provide shoot-thru protection.

Internal bootstrap circuitry only requires an external

capacitor and provides better enhancement of the upper

MOSFET. For a more detailed description of the HIP6601B,

refer to the data sheet [2]. In applications where space is a

premium, the HIP6602B driver is recommended. The

HIP6602B drives two converter channels and requires less

implementation area. For more information refer to the

HIP6602B data sheet [3].

ISL6559EVAL2: Voltage Regulator Down Solution

Application Note

1-888-INTERSIL or 321-724-7143

for AMD Hammer Family Processors

The Intersil multi-phase family driver portfolio continues to

expand with new selections to better fit our customer’s

needs. Refer to our website for updated information:

http://www.intersil.com/power/

ISL6559 VRD Reference Design

The evaluation kit consists of the ISL6559EVAL2 board,

associated data sheets on the ISL6559 controller and

HIP6601B driver, as well as this application note. The

evaluation board provides convenient test points, two types

of power supply connectors, and an on-board transient load

generator to facilitate the evaluation process. The board is

configured for down conversion from 12V to the DAC setting.

The evaluation board meets the output voltage and current

specifications, shown in Table 1, with the VID DIP switch

(SW3) set to 01010 (1.300V). Two jumpers near the

controller are preset and should be checked before powering

up the board. The JP1 jumper should be in the +12V position

(center and right leg with the ATX connector to your right),

and JP2 should be in the ON position (left and center legs).

Additional information on the function of these jumpers is

given in the following section.

The printed circuit board is implemented in 4-layer, 2-ounce

copper. Layout plots and part lists, for this design, are

provided at the end of the application note.

Quick Start Evaluation

Circuit Setup

The ISL6559EVAL2 board will arrive with the VID DIP switch

(SW3) set to 01010 (1.300V). If another output voltage level

is desired, refer to the ISL6559 data sheet for the complete

DAC table and change the VID switches accordingly. Note:

changing the SW3 VID states will change the dynamics of

the load generator.

JP1 selects the VCC voltage to the ISL6559 controller. This

jumper is preset to +12V to create a 12V only converter

solution, as presented. Move the JP1 jumper to the right

most pins to select operation directly from +5V. JP2 sets the

Static Regulation

Transient Regulation

Continuous Load Current

Load Current Step

Load Current Transient

TABLE 1. 3-PHASE VRD DESIGN PARAMETERS

PARAMETER

All other trademarks mentioned are the property of their respective owners.

August 2004

Intersil (and design) is a registered trademark of Intersil Americas Inc.

Author: Ross O. Staffhorst

1.350V

30A/µs

MAX

52A

21A

1.250V

AN1137

MIN

19A

Related parts for ISL6559EVAL2

ISL6559EVAL2 Summary of contents

Page 1

... Quick Start Evaluation Circuit Setup The ISL6559EVAL2 board will arrive with the VID DIP switch (SW3) set to 01010 (1.300V). If another output voltage level is desired, refer to the ISL6559 data sheet for the complete DAC table and change the VID switches accordingly. Note: changing the SW3 VID states will change the dynamics of the load generator ...

Page 2

... FIGURE 1. LOAD TRANSIENT GENERATOR ISL6559 VRD Performance Soft-Start Interval The typical start-up waveforms for the ISL6559EVAL2 are shown in Figure 2. The DAC is set to 01010 (1.300V) and the converter is started into a 52A load. The ENABLE switch, SW1, is thrown to the ON position and the voltage on EN ...

Page 3

... Application Note 1137 The leading edge transient response of the ISL6559EVAL2 to the aforementioned maximum load conditions is shown in VCORE, 500mV/DIV Figure 3. A bench-top electronic load draws 32A continuously from the converter, while the on-board load ICORE, 20A/DIV generator provides a 20A load step ...

Page 4

As the load is removed, the output voltage rises in response. The controller detects the load change and immediately decreases the channel duty cycles. The duty cycle of PWM1 is reduced to zero for one cycle as ...

Page 5

... FIGURE 7. VID-ON-THE-FLY TRANSITION FROM 1.30V TO 1.55V Efficiency The efficiency of the ISL6559EVAL2 board, loaded from 5 to 55A, is plotted in Figure 8. Measurements were performed at room temperature and taken at thermal equilibrium with NO AIR FLOW. The design exceeds the AMD Hammer Desktop minimum requirements of 50% efficiency under minimum loading and 80% efficiency at maximum loading even without forced airflow ...

Page 6

... 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 ...

Page 7

Schematic TP7 OVP OVP VID4 VID3 VID2 VID1 VID0 R4 C2 806 DNS DNS 6.98K 0.012µF VCORE C63 DNS VCC12 L4 0.8µH PHASE1 U2 1 UGATE 2 BOOT 3 PWM1 PWM 4 GND 9 PAD PHASE2 U3 ...

Page 8

VCORE C20 C21 C22 C23 2200µF DNS DNS DNS Ni chi con HN C35 C36 C37 C38 DNS DNS DNS DNS C50 C51 C52 C53 DNS DNS DNS DNS PGOOD SW3 1 10 VID4 2 9 VID3 3 8 VID2 ...

Page 9

VCC12 TRANSIENT LOAD GENERATOR C61 U5 1µF 1 VDD HIP2100 VCC12 R28 46.4K R29 402 M3 1 2N7002_PLP VCC5 VCC12 GND +12V MOUNT1 MOUNT2 GND +12V 2 4 ATX12VAUXPOWER 1 1 ...

Page 10

Bill of Materials QTY REFERENCE VALUE 0 C1 DNS 0 C2 DNS 1 C3 0.010µF Capacitor, Ceramic, 50V, X7R, 10% 7 C4, C6, C7, C11, C12, 1.0µF C16, C17 3 C5, C10, C15 0.1µF 4 C8, C13, C18, C61 1.0µF ...

Page 11

... WSL2512-0.200-1% 2512 Vishay-DALE WSL2512-0.500-1% 2512 C&K Components GT11MSCKE C&K Components SD05H0SK Jolo SPCJ-123-01 Keystone 1514-2 Tektronics 1314353-00 Intersil ISL6559CB Intersil HIP6601BECB Intersil HIP2100IB PACKAGE 0603 0603 0603 0603 0603 0603 0603 0603 2512 SMD SMT Thru Hole Thru Hole Thru Hole ...

Page 12

... LAYER 1 - ROUTING AND SILK SCREEN LAYER 3 - POWER PLANE Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that the Application Note or Technical Brief is current before proceeding. For information regarding Intersil Corporation and its products, see www.intersil.com ...

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