MAX20006EVKIT [MAXIM]
External Frequency Synchronization (SYNC) Input;
| 型号： | MAX20006EVKIT |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | External Frequency Synchronization (SYNC) Input |
| 文件： | 总9页 (文件大小：884K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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Evaluate: MAX20004/MAX20006/MAX20008
MAX20006/MAX20008
Evaluation Kits
General Description
Quick Start
The MAX20006/MAX20008 evaluation kits (EV kits)
demonstrate the MAX20004/MAX20006/MAX20008 high-
voltage, current-mode, synchronous step-down convert-
ers with low operating current. The EV kits operate over a
wide 3.5V to 36V input range. The output is set for 5V in
the default configuration but can be adjusted between 1V
and 10V with appropriate components. The MAX20004/
MAX20006/MAX20008 current limit supports a nominal
output current of 4A/6A/8A, respectively.
Required Equipment
● MAX20006/MAX20008 EV kit
● 14V, 4A DC power supply
● Electronic load capable of 8A
● Digital voltmeter (DVM)
Procedure
Each EV kit is fully assembled and tested. Follow the
steps below to verify board operation. Caution: Do not
turn on supplies until all connections are made.
The EV kit switching frequency is set for either 2.2MHz
(MAX20006EVKIT) or 400kHz (MAX20008EVKIT) in the
default configuration. The switching frequency is resistor
programmable between 220kHz and 2.2MHz and can be
synchronized to an external signal. The EV kits can be
set for fixed-frequency (PWM mode) or pulse-skipping
(SKIP mode) for light load efficiency through the provided
on-board jumper.
1) Verify that jumpers JU1–JU2 are in their default posi-
tions, as shown in Table 1.
2) Connect the 14V power supply between the VIN and
nearest GND input terminals on the EV kit.
3) Connect the electronic load between the VOUT and
nearest GND output terminals on the EV kit and set
for 6A (MAX20006EVKIT) or 8A (MAX20008EVKIT).
Features
● Operating VIN Range of 3.5V to 36V
4) Connect the DVM between the VOUT and nearest
GND output terminals on the EV kit.
● 25µA No Load Quiescent Current in SKIP Mode
5) Turn on the power supply.
● High-Efficiency Synchronous DC-DC Converter
6) Enable the electronic load.
with Integrated FETs
7) Verify that the voltage at VOUT is approximately 5V.
● 220kHz to 2.2MHz Adjustable Frequency
● External Frequency Synchronization (SYNC) Input
● Internal Soft-Start
● Fixed 3.3V/5.0V Output or Resistor Programmable
1V to 10V Output
● Low Dropout (98% Effective Duty Cycle Operation)
● ±2% Output Voltage Accuracy
●
RESET Output
● Proven PCB Layout
● Fully Assembled and Tested
Ordering Information appears at end of data sheet.
319-100194; Rev 0; 5/18
Evaluate: MAX20004/MAX20006/MAX20008
MAX20006/MAX20008
Evaluation Kits
the switching frequency can be synchronized to an appro-
priate external signal applied to the SYNC input terminal.
Detailed Description of Hardware
The MAX20006/MAX20008 EV kits come fully assembled
and tested. The MAX20006EVKIT is populated with
the MAX20006AFOA/VY+, and the MAX20008EVKIT is
populated with the MAX20008AFOA/VY+. Other
converters in the family can be tested on the same EV
kit; however, changing the IC or the output voltage may
also require changing other components. Consult the IC
data sheet for guidance on selecting the proper ICs and
external components.
Setting the Switching Frequency (FOSC)
The IC switching frequency is set by a resistor connected
from FOSC to AGND. Refer to the IC data sheet for
selecting the resistor value.
RESET Output
The EV kit provides a RESET output to monitor the status
of the device output. The RESET output is an open-drain
output from the IC with an external pullup resistor to
VOUT on the EV kits. Refer to the IC data sheet for details
on the RESET functionality.
Enable (EN)
Place a shunt in the 2-3 position on jumper JU1 to enable
the IC for normal operation. To place the device into shut-
down mode, move the shunt on JU1 to the 2-1 position.
Output Voltage Setting
Populating R9 with a 0Ω jumper connects FB to BIAS for
a fixed +5V (EV kit default output) or a fixed +3.3V output
voltage depending on the IC version. To set the output to
other voltages between 1V and 10V, remove R9, populate
R1 with a 0Ω jumper, and populate R7/R8/C14 with the
appropriate values. Other component modifications might
also be required. Refer to the IC data sheet for details on
setting the output voltage.
Synchronization and Switching
The IC has the ability to operate in either forced-
PWM mode or in SKIP mode. Place a shunt in the 2-1
position on JU2 to select forced-PWM mode at the
resistor-programmed frequency. Removing the shunt from
JU2 or placing a shunt in the 2-3 position on jumper JU2
causes the IC to enter SKIP mode for maximum light load
efficiency. With a shunt in the 2-3 position on jumper JU2,
Table 1. Enable Control (JU1)
Table 2. Operating Mode Control (JU2)
SHUNT
POSITION
SHUNT
POSITION
EN PIN
VOUT
SYNC PIN
MODE
2-3*
2-1
EN tied to VSUP
Enabled
Disabled
SYNC tied to
2-1*
Forced PWM
BIAS
EN tied to GND
SYNC pulled to
GND with R2
SKIP or
external SYNC
*Default configuration.
2-3
*Default configuration.
Ordering Information
PART
TYPE
EV Kit
EV Kit
MAX20006EVKIT#
MAX20008EVKIT#
#Denotes RoHS compliant.
Maxim Integrated
│ 2
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Evaluate: MAX20004/MAX20006/MAX20008
MAX20006/MAX20008
Evaluation Kits
MAX20006/MAX20008 EV Kit Bill of Materials
Revison: B
Date: 02/20/2017
Parts Common to All Variants
REFERENCE
C1
C2
QTY DESCRIPTION
MANUFACTURER PART#
1
1
1
3
1
1
2
0
0
1
CAP CER 0.1UF 50V X7R 0402
TDK
TDK
PANASONIC
MURATA
TDK
CGA2B3X7R1H104K050BB
C3216X7R1V106K160AC
EEEFP1V101AP
GRJ188R72A104KE11D
C1608X7R1A225K080AC
C1608C0G2A102J080AA
GRM32ER71A476ME15L
CAP CER 10UF 35V X7R 1206
CAP ALUM 100UF 20% 35V SMD
CAP CER 0.1UF 100V X7R 0603
CAP CER 2.2UF 10V X7R 0603
CAP CER 1000PF 100V X7R 0603
CAP CER 47UF 10V X7R 1210
Not Installed
C3
C4,C5,C7
C8
C9
TDK
MURATA
C10,C11
C13
C14
Not Installed
FERRITE CHIP 60 OHM 6A 1806
FB1
MURATA
BLM41PG600SH1L
J1,J2
R1
R2,R6
2
0
2
3 PIN HEADER 0.100" 40POS CUT TO FIT TE CONNECTIVITY 4-103327-0
Not Installed
RES SMD 100K OHM 1% 1/10W 0603
PANASONIC
ERJ-3EKF1003V
R5,R9
R7
2
0
0
RES SMD 0 OHM JUMPER 1/10W 0603
Not Installed
Not Installed
WIRE LOOP 18AWG SOLID BARE WIRE
TINNED
PANASONIC
ERJ-3GEY0R00V
R8
GND,VIN,SYNC,RESET,VOU
T,GND
6
BANANA JACK UNINSULATED THREADED
EXTERNAL NUT
PCB, MAX20004/6/8 EV Kit
2 POSITION SHUNT CONNECTOR BLACK
OPEN TOP 0.100"
GND,VIN,VOUT,GND
4
1
POMONA
KYCON
3267
2
1
SX1100-B
85-84003-006
LABEL
1
1
WEB instructions for Maxim Data Sheet
BAG, STATIC SHIELD ZIP 5”x6”, W/ ESD
LOGO
EVINSERT
87-02162-000
85-MAXKIT-PNK
1
1
FOAM, ANTI-STATIC PE 12”x12”X5MM
BOX, BROWN 9 3/16” x 7” x 7/8”
MAX20006EVKIT# Variant (5V 2.2MHz)
C6
C12
L1
1
0
1
1
1
CAP CER 3.9PF 100V C0G 0603
Not Installed
INDUCTOR 1UH
MURATA
GRM1885C2A3R9CZ01D
COILCRAFT
PANASONIC
PANASONIC
XAL6030-102ME
ERJ-3EKF1202V
ERJ-3EKF3902V
R3
R4
RES SMD 12K OHM 1% 1/10W 0603
RES SMD 39K OHM 1% 1/10W 0603
U1
1
IC STEP DOWN CONVERTER 17L-FCQFN MAXIM
MAX20006AFOA/VY+
MAX20008EVKIT# Variant (5V 400kHz)
C6
C12
L1
1
1
1
1
1
CAP CER 27PF 100V C0G 0603
CAP CER 47UF 10V X7R 1210
INDUCTOR 4.7UH
MURATA
MURATA
COILCRAFT
PANASONIC
PANASONIC
GRM1885C2A270JA01D
GRM32ER71A476ME15L
XAL6060-472ME
ERJ-3EKF7322V
ERJ-3EKF3002V
R3
R4
RES SMD 73.2K OHM 1% 1/10W 0603
RES SMD 30K OHM 1% 1/10W 0604
U1
1
IC STEP DOWN CONVERTER 17L-FCQFN MAXIM
MAX20008AFOA/VY+
Maxim Integrated
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Evaluate: MAX20004/MAX20006/MAX20008
MAX20006/MAX20008
Evaluation Kits
MAX20006/MAX20008 EV Kit Schematic
ꢋ
ꢋ
ꢋ
2
ꢊ
Maxim Integrated
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Evaluate: MAX20004/MAX20006/MAX20008
MAX20006/MAX20008
Evaluation Kits
MAX20006/MAX20008 EV Kit PCB Layouts
MAX20006/MAX20008 EV Kit PCB Layout—Top Layer
Maxim Integrated
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Evaluate: MAX20004/MAX20006/MAX20008
MAX20006/MAX20008
Evaluation Kits
MAX20006/MAX20008 EV Kit PCB Layouts (continued)
MAX20006/MAX20008 EV Kit PCB Layout—Layer 1
Maxim Integrated
│ 6
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Evaluate: MAX20004/MAX20006/MAX20008
MAX20006/MAX20008
Evaluation Kits
MAX20006/MAX20008 EV Kit PCB Layouts (continued)
MAX20006/MAX20008 EV Kit PCB Layout—Layer 2
Maxim Integrated
│ 7
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Evaluate: MAX20004/MAX20006/MAX20008
MAX20006/MAX20008
Evaluation Kits
MAX20006/MAX20008 EV Kit PCB Layouts (continued)
MAX20006/MAX20008 EV Kit PCB Layout—Bottom Layer
Maxim Integrated
│ 8
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Evaluate: MAX20004/MAX20006/MAX20008
MAX20006/MAX20008
Evaluation Kits
Revision History
REVISION REVISION
PAGES
DESCRIPTION
CHANGED
NUMBER
DATE
0
5/18
Initial release
—
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time.
©
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
2018 Maxim Integrated Products, Inc.
│ 9
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