Analog Devices MAX42410 Manuale utente

Evaluation Board User Guide

MAX42410 Evaluation Kit

Evaluates: MAX42408/MAX42410

319-101037; Rev 0; 11/23

DOCUMENT FEEDBACK

TECHNICAL SUPPORT

One Analog Way, Wilmington, MA 01887 -2356, U.S.A.

Tel: 781.329.4700

General Description

The MAX42410 evaluation kit (EV kit) provide a proven

design to evaluate the MAX42410 synchronous buck

converter with 10μA quiescent current. The EV kit comes

with a MAX42410AFOB+ (1.5MHz) installed, as well as

various test points and jumpers for evaluation. The EV kit

output voltage is variable and is set to 3.3V. It can be easily

configured to 0.8V to 6V (1.5MHz) or up to 10V (400kHz)

with minimum component changes. The EV kit is designed

to deliver up to 10A with input voltage 4.5V to 36V. The

output voltage quality can be monitored by observing the

PGOOD signal.

Benefits and Features

•Input Supply Range from 4.5V to 36V

•Adjustable output voltage from 0.8V to 6V (1.5MHz)

•Delivers Up to 8A/10A

•Frequency-Synchronization Input

•Enable Input

•Voltage Monitoring PGOOD Output Available

•Proven PCB Layout

•Fully Assembled and Tested

Ordering Information appears at end of data sheet.

Quick Start

Required Equipment

•MAX42410 EV kit

•36V, 10A DC power supply (PS)

•Appropriate resistive load, or an electronic load that

can sink 10A

•Digital multimeter (DMM)

•Oscilloscope

Procedure

The EV kit is fully assembled and tested. Do the following

steps to verify board operation:

1. Verify that all jumpers are in their default positions, as

shown in Table 1.

2. Connect the positive and negative terminals of the

power supply to the VSUP and GND test pads,

respectively.

3. Set the power-supply voltage to 14V.

4. Turn on the power supply.

5. Using the DMM, verify the OUT is approximately 3.3V.

6. Verify that the switching frequency is approximately

1.5MHz by monitoring the inductor switching voltage

with the oscilloscope.

7. Turn off the power supply.

8. Connect the positive and negative terminals of the

electronic load to VOUT and GND2, respectively.

9. Set the electronic load to the required current at or

below 10A or use an equivalent resistive load with an

appropriate power rating.

10. Adjust current-limit on the power supply as necessary.

11. Turn on the power supply and electronic load.

12. Verify that voltage across the VOUT and GND2 PCB

pads is 3.3V ± 2%.

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EV Kit Board Photos

Figure 1. MAX42410 EV Kit Board Photo—Top

Figure 2. MAX42410 EV Kit Board Photo—Bottom

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Detailed Description of Hardware

This MAX42410 EV kit data sheet must be used with the MAX42408/MAX42410 IC data sheet.

The MAX42410 EV kit provides a proven layout for the MAX42408/MAX42410 synchronous buck regulator IC. The IC

accepts input voltages as high as 36V and delivers up to 10A. The EV kit can handle an input supply transient up to 42V.

Various test points are included for evaluation.

External Synchronization

The IC can operate in two modes: forced pulse-width modulation (FPWM) or skip mode. Skip mode has better efficiency

for light load conditions. When SYNC is pulled low, the IC operates in skip mode for light loads and FPWM mode for larger

loads. When SYNC is pulled high, the IC is forced to operate in FPWM mode across all load conditions. SYNC can be

used to synchronize with external clock if a clock source is present. The IC is forced to operate in FPWM mode when

SYNC is connected to a clock source.

Buck Output Monitoring (PGOOD)

The EV kit provides a power-good output test point (PGOOD) to monitor the status of the buck output (OUT). PGOOD is

pulled to high when the output is on regulation. It is pulled to ground when the output voltage drops below 7% (typ) of its

nominal regulated voltage.

Programming Buck Output Voltage

The EV kit comes installed with MAX42410AFOB+ (1.5MHz), which provides an adjustable 0.8V to 6V output voltage. To

program VOUT voltage, removing R5 and place appropriate resistors in the positions R7 and R8 according to the following

equation:

Equation 1:

𝑅7 = 𝑅8 × [(𝑉𝑂𝑈𝑇/𝑉𝐹𝐵)− 1]

Where typically VFB = 0.8V and R8 = 10kΩ.

For C16 value, refer to the CFF (pF) column in Table 2. Recommended Component Selection of the

MAX42408/MAX42410 IC data sheet.

Evaluating Other Variants

The EV kit comes installed with a 1.5MHz, 10A variant (MAX42410AFOB+). A 400kHz, 10A (MAX42410AFOA+) variant

is also available on the board together with a corresponding inductor for 3V to 5V output voltage. The other variants can

be installed with minimal component changes.

Evaluation Data

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Table 1. Jumper Connection Guide

JUMPER

DEFAULT CONNECTION

FEATURE

ENABLE

1-2

Buck enabled

1-2

Forced PWM

Installed

PGOOD pulled up to BIAS.

Ordering Information

PART

TYPE

MAX42410EVKIT#

3.3V/1.5MHz EV kit

#Denotes RoHS-compliant.

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MAX42410 EV Kit Bill of Materials

PART

MFG PART #

MANUFACTURER

VALUE

DESCRIPTION

2.2UH

XGL6060-222ME

COILCRAFT

2.2UH

INDUCTOR; SMT;

COMPOSITE; 2.2UH;

20%; 17.2A

BIAS, FBR, GND2,

GNDS, GNDS1-

GNDS3, PGOOD,

SYNCOUT, VEA,

VOUT_TP, VSUPS

5012

KEYSTONE

N/A

TEST POINT; PIN

DIA=0.125IN; TOTAL

LENGTH=0.445IN;

BOARD

HOLE=0.063IN;

WHITE; PHOSPHOR

BRONZE WIRE

SILVER PLATE

FINISH;

C0, C1

CC0603KRX7R0BB104

YAGEO

0.1UF

CAP; SMT (0603);

0.1UF; 10%; 100V;

X7R; CERAMIC

CGA4J3X7R1H225M125AE

TDK

2.2UF

CAP; SMT (0805);

2.2UF; 20%; 50V;

X7R; CERAMIC

EEH-ZA1H101P

PANASONIC

100UF

CAP; SMT (CASE_G);

100UF; 20%; 50V;

ALUMINUM-

ELECTROLYTIC

C4, C5

CGA5L3X7R1H475K160AB

TDK

4.7UF

CAP; SMT (1206);

4.7UF; 10%; 50V;

X7R; CERAMIC

C6, C9, C17

GCJ188R71H104KA12

MURATA

0.1UF

CAP; SMT (0603);

0.1UF; 10%; 50V;

X7R; CERAMIC

C7, C8, C10

CGA2B3X7R1H104M050BB

TDK

0.1UF

CAP; SMT (0402);

0.1UF; 20%; 50V;

X7R; CERAMIC

C11

GRM188R71A225KE15

MURATA

2.2UF

CAP; SMT (0603);

2.2UF; 10%; 10V;

X7R; CERAMIC

C12, C13, C15

GCM32ER71C226ME15

MURATA

22UF

CAP; SMT (1210);

22UF; 20%; 16V; X7R;

CERAMIC

C16

04025C470KAT2A

AVX

47PF

CAP; SMT (0402);

47PF; 10%; 50V; X7R;

CERAMIC

ENABLE, J1

PEC03SAAN

SULLINS

PEC03SAAN

CONNECTOR; MALE;

THROUGH HOLE;

BREAKAWAY;

STRAIGHT; 3PINS

GND, GND3, VOUT,

VSUP_FILTER

575-4

KEYSTONE

575-4

RECEPTACLE; JACK;

BANANA; 0.203IN

[5.2MM] DIA X

0.218IN [5.5MM] L;

0.203D/0.218L;

NICKEL PLATED

BRASS

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MAX42410 EV Kit Bill of Materials (continued)

PART

MFG PART #

MANUFACTURER

VALUE

DESCRIPTION

PEC02SAAN

SULLINS

PEC02SAAN

CONNECTOR; MALE;

THROUGH HOLE;

BREAKAWAY;

STRAIGHT; 2PINS

FBMJ4516HS720N

TAIYO YUDEN

INDUCTOR; SMT (1806);

FERRITE-BEAD; 72

IMPEDANCE AT 100MHZ;

XEL6030-222ME

COILCRAFT

2.2UH

INDUCTOR; SMT;

COMPOSITE; 2.2UH;

20%; 10A

XGL6060-681ME

COILCRAFT

0.68UH

INDUCTOR; SMT;

COMPOSITE; 0.68UH;

20%; 22.7A

MAX42410AFOA+

ANALOG DEVICES,

INC.

MAX42410AFOA+

EVKIT PART - IC;

MAX42410AFOA+;

FC2QFN17

ERA-2AEB103

PANASONIC

10K

RES; SMT (0402); 10K;

0.10%; +/-25PPM/DEGK;

0.0630W

R4, R6

RC0402JR-070RL

YAGEO PHYCOMP

RES; SMT (0402); 0; 5%;

JUMPER; 0.0630W

CRCW060349K9FK

VISHAY DALE

49.9K

RES; SMT (0603); 49.9K;

1%; +/-100PPM/DEGC;

0.1000W

AC0603FR-0715K8L

YAGEO

15.8K

RES; SMT (0603); 15.8K;

1%; +/-100PPM/DEGC;

0.1000W

MAX42410AFOB+

ANALOG DEVICES,

INC.

MAX42410AFOB+

EVKIT PART - IC;

MAX42410AFOB+;

FC2QFN17

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MAX42410 EV Kit Schematic

MAX42410AFOB+

SYNCOUT

SYNC

PGOOD

VEA

OUT

BIAS

GND

SUP

PGND

6LX

5PGND

4PGND

3SUP

2BST

1EN

49.9K

15.8K

22UF

C12

22UF

C13

22UF

C15

OPEN

C14

47PF

C16

2.2UF

0.1UF

C0 100UF

0.1UF

2.2UF

C11

0.1UF

C10

0.1UF

C17

GND

GNDS

0.1UF

4.7UF

VSUPS

ENABLE

FBR

0.68UH

4.7UF

SYNCOUT

VEA

10K

PGOOD

R4 0

GNDS2

VOUT

BIAS

2.2UH

GNDS1 GNDS3

TP_LX

GND3

VSUP_FILTER

GND2

VOUT_TP

BIAS

VSUP_FILTER

FBR

POUT

SYNCOUT

OUT

VSUP

BST

SYNC

PGOOD

VEA

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MAX42410 EV Kit PCB Layout

MAX42410 EV Kit Component Placement Guide—Top

Silkscreen

MAX42410 EV Kit PCB Layout—Layer 2

MAX42410 EV Kit PCB Layout—Top

MAX42410 EV Kit PCB Layout—Layer 3

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MAX42410 EV Kit PCB Layout (Continued)

MAX42410 EV Kit PCB Layout—Bottom

MAX42410 EV Kit Component Placement Guide—Bottom

Silkscreen

Revision History

REVISION

NUMBER

REVISION

DATE

DESCRIPTION

PAGES

CHANGED

11/23

Initial release

—

Evaluation Board User Guide

MAX42410 Evaluation Kit

ASSUMED BY ANALOG DEVICES FOR ITS USE, NOR FOR ANY INFRINGEMENTS OF PATENTS OR OTHER RIGHTS OF THIRD PARTIES THAT

MAY RESULT FROM ITS USE. SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE. NO LICENCE, EITHER EXPRESSED OR

IMPLIED, IS GRANTED UNDER ANY ADI PATENT RIGHT, COPYRIGHT, MASK WORK RIGHT, OR ANY OTHER ADI INTELLECTUAL PROPERTY

RIGHT RELATING TO ANY COMBINATION, MACHINE, OR PROCESS WHICH ADI PRODUCTS ALL INFORMATION CONTAINED HEREIN IS

PROVIDED “AS IS” WITHOUT REPRESENTATION OR WARRANTY. NO RESPONSIBILITY IS OR SERVICES ARE USED. TRADEMARKS AND

REGISTERED TRADEMARKS ARE THE PROPERTY OF THEIR RESPECTIVE OWNERS.

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