Datasheet
Evaluates: MAX17014
MAX17014 Evaluation Kit
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logic-high, both the OUT and the VGOFF outputs are
enabled. Removing the shunt disables the OUT and the
VGOFF outputs. Refer to the
Power-Up Sequence
sec-
tion in the MAX17014 IC data sheet for a more detailed
description of the OUT and VGOFF power-up sequence.
Table 4 lists the selectable JU3 jumper options.
Step-Up and Positive Charge-Pump
Regulator Enable Input (EN2)
The MAX17014 EV kit features a jumper (JU4) to control
the step-up and positive charge-pump regulator enable
input (EN2). By default, a shunt is installed across JU4
to provide EN2 logic-high. When EN2 and EN1 are
logic-high, both the AVDD and the VGON outputs are
enabled. EN2 is inactive when EN1 is low. Refer to the
Power-Up Sequence
section in the MAX17014 IC data
sheet for a more detailed description of the AVDD and
VGON power-up sequence. Table 4 lists the selectable
JU4 jumper options.
High-Voltage Switch Control Input (CTL)
Jumper JU5 configures the setting to control the high-
voltage switch control pin (CTL) of the MAX17014 IC.
Switches between the SRC and GON pins and the
GON and DRN pins can also be controlled by an exter-
nal logic controller connected to the CTL pad. See
Table 5 for switch states and refer to the
High-Voltage
Switch Control
section in the MAX17014 IC data sheet
for further information about the high-voltage switches
connected to the GON pin.
VGON Discharge Path
The MAX17014 EV kit features a method to configure
the VGON discharge path using resistor R15 and
jumper JU6. When CTL is low, GON may be connected
to DRN, allowing VGON to discharge through resistor
R15. JU6 selects the discharge path by connecting
R15 to AVDD (through diode D6) or to PGND. Table 6
lists the selectable JU6 jumper options.
Output Voltage Selection
Step-Down Switching-Regulator
Output Voltage (OUT)
The MAX17014 EV kit’s step-down switching regulator
supports both fixed and adjustable output voltages. By
default, the EV kit’s step-down regulator’s output (OUT)
is set to the +3.3V fixed mode by connecting FB2 to
GND through resistor R19. For adjustable mode
(+1.25V to +5V), select R18 and R19 to set the desired
step-down regulator output voltage. Refer to the
Detailed Description
,
Step-Down Regulator
section in
the MAX17014 IC data sheet for instructions on select-
ing resistors R18 and R19.
SHUNT POSITION
JU3 JU4
STEP-DOWN AND NEGATIVE
CHARGE-PUMP REGULATOR
STEP-UP AND POSITIVE
CHARGE-PUMP REGULATOR
Installed* Installed* Enabled Enabled
Installed Not installed Enabled Disabled
Not installed X Disabled Disabled
Table 4. Jumpers JU3 and JU4 Functions
*
Default position.
X = Don’t care.
SHUNT POSITION CTL PIN CONNECTED TO MAX17014 HIGH-VOLTAGE SWITCH CONFIGURATION
Installed* VL GON pin connected to SRC pin
Not installed GND (through resistor R14) GON pin connected to DRN pin
GON pin connected to SRC pin (CTL driven high)
Not installed (external logic
controller connected to CTL pad)
External logic controller
GON pin connected to DRN pin (CTL driven low)
Table 5. Jumper JU5 Functions
*
Default position.
SHUNT
POSITION
DRN PIN
CONNECTED TO
VGON
DISCHARGED
TOWARD
1-2*
AVDD (through resistor R15
and diode D6)
AVDD
2-3 PGND (through resistor R15) PGND
Table 6. Jumper JU6 Functions
*
Default position.