MAX17021 Evaluation Kit

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3

Quick Start

Recommended Equipment

•

MAX17021 EV kit

•

7V to 24V, > 100W power supply, battery, or note-

book AC adapter

•

DC bias power supply, 5V at 1A

•

Dummy load capable of sinking 60A

•

Digital multimeters (DMMs)

•

100MHz dual-trace oscilloscope

Procedure

The MAX17021 EV kit is fully assembled and tested.

Follow the steps below to verify board operation:

1) Ensure that the circuit is connected correctly to the

supplies and dummy load prior to applying any power.

2) Verify that all positions of switch SW2 are off. The DAC

code settings (D6–D0) are set by switch SW1. Set

SW1 (1, 14), SW1 (2, 13), SW1 (4, 11), SW1 (5, 10),

and SW1 (7, 8) to the on positions. The output voltage

is set for 1.050V.

3) Turn on the battery power before turning on the 5V

bias power.

4) Observe the 1.050V output voltage with the DMM

and/or oscilloscope. Look at the LX switching nodes

and MOSFET gate-drive signals while varying the

load current.

Detailed Description of Hardware

This 60A peak multiphase buck-regulator design is

optimized for a 300kHz switching frequency (per

ly 35% (LIR = 0.35). The MAX17021 controller inter-

leaves all the active phases, resulting in out-of-phase

operation that minimizes the input and output filtering

requirements. The multiphase controller shares the cur-

rent between two phases that operate 180

° out-of-

phase, supplying up to 30A per phase.

Component List (continued)

DESIGNATION

QTY

DESCRIPTION

R27, R28, R29,

R31, R32,

R36–R42

12

100k

±5% resistors (0603)

R45, R46

2

2

±5% resistors (0603)

SW1

1

7-position low-profile DIP switch

SW2

1

5-position low-profile DIP switch

DESIGNATION

QTY

DESCRIPTION

U1

1

Dual-phase, Quick-PWM VID

controller (40 TQFN-EP*)

Maxim MAX17021GTL+

U2

1

CPU socket MPGA479

—

1

PCB: MAX17021 Evaluation Kit+

Component Suppliers

*

EP = Exposed pad.

Note: Indicate that you are using the MAX17021 when contacting these component suppliers.

SUPPLIER

PHONE

WEBSITE

AVX Corporation

843-946-0238

www.avxcorp.com

Central Semiconductor Corp.

631-435-1110

www.centralsemi.com

Digi-Key Corp.

800-344-4539

www.digikey.com

Fairchild Semiconductor

888-522-5372

www.fairchildsemi.com

KEMET Corp.

864-963-6300

www.kemet.com

Murata Electronics North America, Inc.

770-436-1300

www.murata-northamerica.com

NEC TOKIN America, Inc.

408-324-1790

www.nec-tokinamerica.com

Nihon Inter Electronics Corp.

847-843-7500

www.niec.co.jp

Panasonic Corp.

800-344-2112

www.panasonic.com

Taiyo Yuden

800-348-2496

www.t-yuden.com

TDK Corp.

847-803-6100

www.component.tdk.com

TOKO America, Inc.

847-297-0070

www.tokoam.com

Vishay

402-563-6866

www.vishay.com