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Table 1. Jumper Descriptions (JU1–JU10)
JUMPER
SHUNT POSITION
1-2*
JU1
2-3
1-2*
JU2
2-3
1-2*
JU3
2-3
1-2*
JU4
2-3
1-2*
JU5
2-3
1-2*
JU6
2-3
1-2*
JU7
Open
1-2*
JU8
Open
1-2*
JU9
Open
1-2*
JU10
Open
*Default position.
Detailed Description of Hardware
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-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
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.
Connects the FB1 pin of the IC to ground, which sets the OUT1 voltage to 3.3V.
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.
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.
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.
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.
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.
Uses LED D4 to indicate that the output of the converter (DC-DC1) is in the correct
regulation range.
Disables LED D4. The POR signal can be monitored at the PORB PCB pad on the EV kit.
DESCRIPTION
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 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.
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.
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