Datasheet

MAX5976B Evaluation Kit
Evaluates: MAX5976A/MAX5976B
2 ______________________________________________________________________________________
Quick Start
Required Equipment
• MAX5976BEVkit
• 12V,10ADCpowersupply
• Voltmeter
Procedure
The EV kit is fully assembled and tested. Follow the
steps below to verify board operation. Caution: Do not
turn on the power supply until all connections are
completed.
1) Verify that shunts are installed in their default position
for jumpers JU1 and JU2, as shown in Table 1.
2) Verify that slide switches SW1, SW2, and SW3 are set
in their default position, as shown in Table 2.
3) Turn on the power supply and set the supply to 12V,
then disable the power supply.
4) Connect the positive terminal of the power supply to the
VIN banana jack on the EV kit. Connect the negative
terminal of the power supply to the GND banana jack.
5) Enable the power supply.
6) Verify that the voltage between the OUT and GND
banana jacks is 12V.
7) Verify that the voltage at the internal regulator voltage
test point (REG) is 2.6V.
8) The EV kit is now ready for additional evaluation.
Detailed Description of Hardware
The MAX5976B EV kit provides a proven design to
evaluate the MAX5976B hot-swap controller with an
integrated 7A MOSFET. The EV kit can be conveniently
connected between the system power and the load
using the banana jacks provided for the input and output
voltage. PCB pads are provided to monitor and control
the device signals. The EV kit operates between 2.7V
and 18V with up to 7A load-current capability.
Evaluating the MAX5976A
The EV kit can also be used to evaluate the MAX5976A
after IC replacement of U1 with the MAX5976AETE+. The
MAX5976A is pin-to-pin compatible with the MAX5976B.
Refer to the MAX5976A/MAX5976B IC data sheet for
details on the MAX5976A.
Jumper Selection
Circuit Breaker (CB)
Jumper JU1 sets the current limit for the internal circuit
breaker (CB) of the device. The CB pin can be connected
to a fixed resistor (R8) or a potentiometer (R9) to set the
current limit. See Table 3 for shunt positions.
Undervoltage Lockout (ON1)
The EV kit provides an option to configure the undervolt-
age-lockout threshold. The undervoltage-lockout threshold
for the device is configured by the VIN voltage level divided
by R1 and R10 at the ON1 pin. Set slide switch SW1 to
position 1-2 before configuring the undervoltage-lockout
threshold. See Table 4 for JU2 shunt positions.
Slide Switches
Active-High Enable (ON1)
Slide switch SW1 controls the active-high enable pin
(ON1) on the device. See Table 5 for switch positions.
Component Suppliers
Note: Indicate that you are using the MAX5976B when contacting these component suppliers.
Table 1. Default Shunt Positions (JU1, JU2)
Table 2. Default Switch Positions
(SW1, SW2, SW3)
SUPPLIER PHONE WEBSITE
Fairchild Semiconductor 888-522-5372 www.fairchildsemi.com
Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com
JUMPER
SHUNT
POSITION
MAX5976B
PIN
EV KIT
FUNCTION
JU1 1-2
CB to GND
(through
resistor R8)
Current limit is
set to 7A.
JU2 Installed
ON1 to VIN
(through
resistor R1)
Undervoltage-
lockout
threshold is
set to 2.5V.
SWITCH
SWITCH
POSITION
MAX5976B
PIN
EV KIT
OUTPUT
SW1 1-2
ON1 to VIN
(through resis-
tor R1 and
jumper JU2)
Enabled
SW2 2-3
ON2 to GND
SW3 2-3
PRESDET to
GND