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MAX8855 Evaluation Kit
VDL Supply
VDL is the low-side gate-drive supply for the device.
The high-side gate drive (BST_) and the IC supply volt-
age (V DD ) are also derived from VDL. In the EV kit’s
default configuration, VDL is connected to IN through
the 0 Ω resistor R2, allowing the EV kit to operate from a
Table 1. Jumper JU1 Functions
single input supply between 2.35V and 3.6V. VDL can
optionally be powered separately from the power input.
When powering VDL separately, remove resistor R2
and connect a 2.35V to 3.6V supply to the VDL pad on
the EV kit.
Table 3. Jumper JU3 Functions
SHUNT
LOCATION
Not installed
(default)
1-2
2-3
EN1 CONNECTED TO
Pulled up to V DD
through R3
PWRGD2
GND
REGULATOR 1
Enabled
Sequencing: OUT1 is
enabled when OUT2
is in regulation
Disabled
SHUNT
LOCATION
1-2 (default)
2-3
Not installed
REFIN CONNECTED
TO
SS1
OUT2 through R1
—
FUNCTION
Internal reference
(0.6V)
OUT1 tracks V OUT2
External reference
(0V to V DD - 1.6V)
connected to REFIN
pad
Table 2. Jumper JU2 Functions
SHUNT
LOCATION
Not installed
(default)
1-2
EN2 CONNECTED TO
Pulled up to V DD
through R18
GND
REGULATOR 2
Enabled
Disabled
4
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