MAX16920A [MAXIM]
5.5V to 18V Input Range, Survives 45V Transients;
| 型号： | MAX16920A |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 5.5V to 18V Input Range, Survives 45V Transients |
| 文件： | 总9页 (文件大小：1114K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-5744; Rev 0; 1/11
Evaluates: MAX16920A/MAX16920B
Ordering Information appears at end of data sheet.
Component List
_________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX16920B Evaluation Kit
Evaluates: MAX16920A/MAX16920B
Component List (continued)
DESIGNATION QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
Power-management IC
(32 TQFN-EP)
Maxim MAX16920BATJ/V+
47FF Q10%, 10V X7R ceramic
capacitor (1210)
Murata GRM32ER71A476K
U1
1
—
—
—
—
1
1
1
1
—
—
10
1
Shunts
47FH, 1.14A inductor
(7.60mm x 7.60mm x 4.35mm)
Cooper Bussmann DRA74-470-R
PCB: MAX16920B EVALUATION
KIT+
ADDITIONAL COMPONENTS FOR MAX16920A
EVALUATION
22FH, 1.68A inductor
(7.60mm x 7.60mm x 4.35mm)
Cooper Bussmann DRA74-220-R
22FF Q10%, 10V X7R ceramic
capacitors (1206)
Murata GRM31CR71A226K
—
3
10FH, 2.56A inductor
(7.60mm x 7.60mm x 4.35mm)
Cooper Bussmann DRA74-100-R
Component Suppliers
SUPPLIER
PHONE
WEBSITE
Cooper Bussmann
916-941-1117
805-446-4800
770-436-1300
800-344-2112
847-803-6100
402-563-6866
www.cooperet.com
Diodes Incorporated
www.diodes.com
Murata Electronics North America, Inc.
www.murata-northamerica.com
www.panasonic.com
www.component.tdk.com
www.vishay.com
Panasonic Corp.
TDK Corp.
Vishay
Note: Indicate that you are using the MAX16920B when contacting these component suppliers.
5) Adjust the second load to 600mA and connect to the
Quick Start
OUT2 and PGND2 PCB pads on the EV kit.
6) Connect the second voltmeter to the OUT2 and
PGND2 PCB pads on the EV kit.
Required Equipment
•ꢀ MAX16920B EV kit
7) Adjust the third load to 1.5A and connect to the OUT3
and PGND3 PCB pads on the EV kit.
•ꢀ 12V, 2.5A DC power supply
•ꢀ Four electronic loads (e.g., HP6060B)
•ꢀ Four voltmeters
8) Connect the third voltmeter to the OUT3 and PGND3
PCB pads on the EV kit.
Procedure
9) Adjust the fourth load to 150mA and connect to the
OUTA and GND PCB pads on the EV kit.
The EV kit is fully assembled and tested. Follow the steps
below to verify board operation. Caution: Do not turn on
power supplies until all connections are completed.
10) Connect the fourth voltmeter to the OUTA and GND
PCB pads on the EV kit.
1) Verify that all jumpers are in their default position, as
shown in Table 1.
11) Connect the SYNC and GND PCB pads on the EV kit
together.
2) Adjust the power supply to 12V and connect to the
VIN and PGND PCB pads on the EV kit.
12) Turn on the DC power supply.
13) Enable all loads.
3) Adjust the first load to 150mA and connect to the
OUT1 and PGND1 PCB pads on the EV kit.
14) Verify that the first voltmeter reads approximately 3.3V.
15) Verify that the second voltmeter reads approximately 5V.
16) Verify that the third voltmeter reads approximately 3.3V.
17) Verify that the fourth voltmeter reads approximately 5V.
4) Connect the first voltmeter to the OUT1 and PGND1
PCB pads on the EV kit.
_________________________________________________________________ Maxim Integrated Products
2
MAX16920B Evaluation Kit
Evaluates: MAX16920A/MAX16920B
Table 1. Jumper Descriptions (JU1–JU10)
JUMPER
SHUNT POSITION
DESCRIPTION
1-2*
2-3
Enables the OUT2 output of the IC.
Disables the OUT2 output of the IC.
Enables the OUT3 output of the IC.
Disables the OUT3 output of the IC.
Enables the OUTA output of the IC.
Disables the OUTA output of the IC.
JU1
1-2*
2-3
JU2
JU3
1-2*
2-3
1-2*
Connects the FB1 pin of the IC to ground, which sets the OUT1 voltage to 3.3V.
JU4
JU5
JU6
JU7
Connects the FB1 pin of the IC to the voltage-divider of R11 and R12. Users must install
appropriate feedback resistors to adjust the voltage between 1.22V and 5V.
2-3
1-2*
2-3
Connects the FB2 pin of the IC to ground, which sets the OUT2 voltage to 5V.
Connects the FB2 pin of the IC to the voltage-divider of R13 and R16. Users must install
appropriate feedback resistors to adjust the voltage between 1.22V and 5V.
1-2*
2-3
Connects the FB3 pin of the IC to ground, which sets the OUT3 voltage to 3.3V.
Connects the FB3 pin of the IC to the voltage-divider of R14 and R15. Users must install
appropriate feedback resistors to adjust the voltage between 1.22V and 8V.
Uses LED D5 to indicate that the output of the converter (DC-DC2) is in the correct
regulation range.
1-2*
Open
1-2*
Disables LED D5. The PG2 signal can be monitored at the PG2 PCB pad on the EV kit.
Uses LED D2 to indicate that the output of the converter (DC-DC3) is in the correct
regulation range.
JU8
JU9
Open
1-2*
Disables LED D2. The PG3 signal can be monitored at the PG3 PCB pad on the EV kit.
Uses LED D3 to indicate that the output of the LDO is in the correct regulation range.
Disables LED D3. The PGA signal can be monitored at the PGA PCB pad on the EV kit.
Open
Uses LED D4 to indicate that the output of the converter (DC-DC1) is in the correct
regulation range.
1-2*
JU10
Open
Disables LED D4. The POR signal can be monitored at the PORB PCB pad on the EV kit.
*Default position.
pad on the EV kit. The output voltage can be adjusted
Detailed Description of Hardware
from 1.22V to 5V by placing a shunt in the 2-3 position on
jumper JU5 and selecting the appropriate resistor values
for R13 and R16. To enable DC-DC2, place a shunt in the
1-2 position on jumper JU1. To disable DC-DC2, place a
shunt in the 2-3 position on JU1. A lit LED (D5) indicates
that the output of DC-DC2 is in the correct regulation
range.
The MAX16920B EV kit is an assembled and tested PCB
used to evaluate the MAX16920B power-management
IC for automotive radios, containing three step-down
converters, one linear regulator, and an overvoltage-
protection block.
DC-DC1 Step-Down Converter
The output voltage of the DC-DC1 step-down converter
is set to 3.3V and can be accessed from the OUT1 PCB
pad on the EV kit. The output voltage can be adjusted
from 1.22V to 5V by placing a shunt in the 2-3 position on
jumper JU4 and selecting the appropriate resistor values
for R11 and R12. A lit LED (D4) indicates that the output
of DC-DC1 is in the correct regulation range.
DC-DC3 Step-Down Converter
The output voltage of the DC-DC3 step-down converter
is set to 3.3V and can be accessed from the OUT3 PCB
pad on the EV kit. The output voltage can be adjusted
from 1.22V to 8V by placing a shunt in the 2-3 position on
jumper JU6 and selecting the appropriate resistor values
for R14 and R15. To enable DC-DC3, place a shunt in the
1-2 position on jumper JU2. To disable DC-DC3, place a
shunt in the 2-3 position on JU2. A lit LED (D2) indicates
that the output of DC-DC3 is in the correct regulation
range.
DC-DC2 Step-Down Converter
The output voltage of the DC-DC2 step-down converter
is set to 5V and can be accessed from the OUT2 PCB
_________________________________________________________________ Maxim Integrated Products
3
MAX16920B Evaluation Kit
Evaluates: MAX16920A/MAX16920B
LDOA
The output voltage on the linear regulator (LDOA) is set
at 5V and can be accessed from the OUTA PCB pad on
the EV kit. The output can be enabled or disabled by
placing a shunt in the appropriate position on jumper JU3
(see Table 1). To enable LDOA, place a shunt in the 1-2
position on JU3. To disable LDOA, place a shunt in the
2-3 position on JU3. LED D3 indicates that the output of
LDOA is in the correct regulation range.
Voltage Output (UVO)
UVO is an active-low voltage output to monitor the input
voltage and is accessible through the UVOB PCB pad on
the EV kit. The UVO signal is pulled low by the IC when
the V falls below 7V.
IN
Overtemperature Output (OT)
OT is an active-low overtemperature output and is
accessible through the OTB PCB pad on the EV kit. The
OT signal is pulled low by the IC and disables all convert-
ers except for DC-DC1 if the die temperature exceeds the
thermal-shutdown temperature.
SYNC
The IC provides a fixed 2.2MHz switching frequency
when the SYNC PCB pad on the EV kit is connected
to ground. For external synchronization, apply a clock
signal between 1.8MHz to 2.4MHz at the SYNC PCB pad
on the EV kit.
Evaluating the MAX16920A
Included with the EV kit are capacitors and inductors to
evaluate the MAX16920A. Replace C10, C11, and C12
with the 22FF capacitors, C20 with the 47FF capacitor, L1
with the 47FH inductor, L2 with the 22FH inductor, and L3
with the 10FH inductor.
_________________________________________________________________ Maxim Integrated Products
4
MAX16920B Evaluation Kit
Evaluates: MAX16920A/MAX16920B
Figure 1. MAX16920B EV Kit Schematic
_________________________________________________________________ Maxim Integrated Products
5
MAX16920B Evaluation Kit
Evaluates: MAX16920A/MAX16920B
1.0”
1.0”
Figure 3. MAX16920B EV Kit PCB Layout—Component Side
Figure 2. MAX16920B EV Kit Component Placement Guide—
Component Side
1.0”
Figure 4. MAX16920B EV Kit PCB Layout—Inner Layer 2
_________________________________________________________________ Maxim Integrated Products
6
MAX16920B Evaluation Kit
Evaluates: MAX16920A/MAX16920B
1.0”
1.0”
Figure 5. MAX16920B EV Kit PCB Layout—Inner Layer 3
Figure 6. MAX16920B EV Kit PCB Layout—Solder Side
1.0”
Figure 7. MAX16920B EV Kit Component Placement Guide—
Solder Side
_________________________________________________________________ Maxim Integrated Products
7
MAX16920B Evaluation Kit
Evaluates: MAX16920A/MAX16920B
Ordering Information
PART
TYPE
MAX16920BEVKIT+
EV Kit
+Denotes lead(Pb)-free and RoHS compliant.
_________________________________________________________________ Maxim Integrated Products
8
MAX16920B Evaluation Kit
Evaluates: MAX16920A/MAX16920B
Revision History
REVISION
NUMBER
REVISION
DATE
PAGES
DESCRIPTION
CHANGED
0
1/11
Initial release
—
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
9
©
2011 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
相关型号：
MAX16920BATJ/V+
Power Supply Support Circuit, Adjustable, 1 Channel, BICMOS, 7 X 7 MM, ROHS COMPLIANT, TQFN-32
MAXIM
MAX16922ATPC/V+
Dual Switching Controller, Current-mode, 1.2A, 2400kHz Switching Freq-Max, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, TQFN-20
MAXIM
MAX16922ATPH/V+
Dual Switching Controller, Current-mode, 1.2A, 2400kHz Switching Freq-Max, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, TQFN-20
MAXIM
MAX16922ATPI/V+
Switching Regulator, Current-mode, 1.2A, 2400kHz Switching Freq-Max, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, TQFN-20
MAXIM
MAX16922ATPJ/V+
Switching Regulator, Current-mode, 1.2A, 2400kHz Switching Freq-Max, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, TQFN-20
MAXIM
MAX16922ATPK/V+
Dual Switching Controller, Current-mode, 1.2A, 2400kHz Switching Freq-Max, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, TQFN-20
MAXIM
MAX16922ATPM/V+
Dual Switching Controller, Current-mode, 2.1A, 2400kHz Switching Freq-Max, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, TQFN-20
MAXIM
©2020 ICPDF网 联系我们和版权申明