Analog Devices MAX42410 User manual

Evaluation Board User Guide
MAX42410 Evaluation Kit
Evaluates: MAX42408/MAX42410
319-101037; Rev 0; 11/23
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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
J1
1-2
Forced PWM
J2
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
C2
CGA4J3X7R1H225M125AE
TDK
2.2UF
CAP; SMT (0805);
2.2UF; 20%; 50V;
X7R; CERAMIC
C3
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
J2
PEC02SAAN
SULLINS
PEC02SAAN
CONNECTOR; MALE;
THROUGH HOLE;
BREAKAWAY;
STRAIGHT; 2PINS
L0
FBMJ4516HS720N
TAIYO YUDEN
72
INDUCTOR; SMT (1806);
FERRITE-BEAD; 72
IMPEDANCE AT 100MHZ;
6A
L1
XEL6030-222ME
COILCRAFT
2.2UH
INDUCTOR; SMT;
COMPOSITE; 2.2UH;
20%; 10A
L2
XGL6060-681ME
COILCRAFT
0.68UH
INDUCTOR; SMT;
COMPOSITE; 0.68UH;
20%; 22.7A
MAX42410AFOA+
MAX42410AFOA+
ANALOG DEVICES,
INC.
MAX42410AFOA+
EVKIT PART - IC;
MAX42410AFOA+;
FC2QFN17
R2
ERA-2AEB103
PANASONIC
10K
RES; SMT (0402); 10K;
0.10%; +/-25PPM/DEGK;
0.0630W
R4, R6
RC0402JR-070RL
YAGEO PHYCOMP
0
RES; SMT (0402); 0; 5%;
JUMPER; 0.0630W
R7
CRCW060349K9FK
VISHAY DALE
49.9K
RES; SMT (0603); 49.9K;
1%; +/-100PPM/DEGC;
0.1000W
R8
AC0603FR-0715K8L
YAGEO
15.8K
RES; SMT (0603); 15.8K;
1%; +/-100PPM/DEGC;
0.1000W
U1
MAX42410AFOB+
ANALOG DEVICES,
INC.
MAX42410AFOB+
EVKIT PART - IC;
MAX42410AFOB+;
FC2QFN17

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MAX42410 EV Kit Schematic
U1
MAX42410AFOB+
17
SYNCOUT
16
SYNC
15
PGOOD
14
VEA
13
OUT
12
FB
11
BIAS
10
GND
9
SUP
8
PGND
7
PGND
6LX
5PGND 4PGND 3SUP 2BST 1EN
R6
0
R7
49.9K
R8
15.8K
22UF
C12
22UF
C13
22UF
C15
OPEN
C14
47PF C16
2.2UF
C2
0.1UF
C0 100UF
C3
+
0.1UF
C6
0.1UF
C9
2.2UF C11
0.1UF
C8
0.1UF
C10
0.1UF
C7
0.1UF
C17
GND
GNDS
C1
0.1UF
L0
72
C4
4.7UF
VSUPS
ENABLE
2
3
1
J1
2
3
1
FBR
L2
0.68UH
C5 4.7UF
SYNCOUT
VEA
J2
1
2
R2
10K
PGOOD
R4 0
GNDS2
VOUT
BIAS
L1
2.2UH
GNDS1 GNDS3
TP_LX
GND3
VSUP_FILTER
GND2
VOUT_TP
BIAS
BIAS
BIAS
VSUP_FILTER
FBR
POUT
POUT
SYNCOUT
OUT
VSUP
VSUP
LX
BST
EN
SYNC
PGOOD
VEA
FB
FB

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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
0
11/23
Initial release
—

Evaluation Board User Guide
MAX42410 Evaluation Kit
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MAY RESULT FROM ITS USE. SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE. NO LICENCE, EITHER EXPRESSED OR
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