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MAX17014 Evaluation Kit
Step-Up Switching-Regulator
Output Voltage (AVDD)
The MAX17014 EV kit’s step-up switching-regulator out-
put (AVDD) is set to +16V by feedback resistors R3 and
R4. To generate output voltages other than +16V (VIN
to +20V), select different external voltage-divider resis-
tors. Refer to the Design Procedure, Step-Up Regulator
section in the MAX17014 IC data sheet for instructions
on selecting the feedback resistors.
Positive Charge-Pump Output (VGON)
The positive charge-pump output (VGON) is set to
+35V by voltage-divider resistors R16 and R17. To set
VGON to other voltages (up to approximately 3 x
AVDD, 44V max), select different divider resistors.
Refer to the Design Procedure, Charge-Pump
Regulators, Output Voltage Selection section in the
MAX17014 IC data sheet for instructions on selecting
resistors R16 and R17.
Negative Charge-Pump Output (VGOFF)
The negative charge-pump output (VGOFF) is set to
-6V by voltage-divider resistors R1 and R2. To set
VGOFF to other voltages (0V to -AVDD), select different
divider resistors. For VGOFF lower than -16V, select
C15 with a higher voltage rating. Refer to the Design
Procedure, Charge-Pump Regulators, Output Voltage
Selection section in the MAX17014 IC data sheet for
instructions on selecting resistors R1 and R2.
Op-Amp Output Voltages (VCOM1, VCOM2)
The MAX17014 EV kit ’s op-amp outputs (VCOM1,
VCOM2) are designed to drive the LCD backplane
(VCOM). Both op amps are configured as unity gain
buffers by resistors R12 and R13. Using external volt-
age-divider resistors, each op amp’s output is set for
one half of the AVDD output voltage. To generate out-
put voltages other than +8V, select different external
voltage-divider resistors (R8–R11).
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