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MAX16050 Evaluation Kit
Caution: When operating the MAX16050 EV kit
U1_VCC or U2_VCC inputs with power supplies greater
than 5.5V, verify that shunts are installed across pins 2-3
of jumpers JU1 and JU10 to prevent operating the open-
drain logic outputs above the maximum voltage rating.
Table 3. Jumpers JU1, JU10 Configuration
where V EN is the desired VCC undervoltage threshold,
0.5V is the MAX16050/MAX16051 EN threshold voltage,
and R A is the new resistor value for R1 or R20 in kilohms.
Charge-Pump Outputs (CP_OUT)
The EV kit features test points (U1_CP_OUT,
U2_CP_OUT) to monitor the MAX16050 and MAX16051
charge-pump outputs. PCB pads are also available for
SHUNT
POSITION
1-2
2-3
OUT_ PULLUP RESISTOR VOLTAGE
SOURCE
OUT_ connects to VCC through resistor
OUT_ connects to VPULLUP through resistor
the installation of low-current SOT23 footprint n-channel
MOSFETs at N1 and N2.
The EV kit’s charge-pump outputs can also be used as
the pullup voltages for open-drain output OUT3 using
jumpers JU3 and JU12. See Table 5 for configuring
EN Control (JU2, JU11)
Jumpers JU2 and JU11 enable or disable the MAX16050
and MAX16051, respectively, for power-up sequencing
OUT3 to the respective charge-pump outputs.
Table 5. Jumpers JU3, JU12 Configuration
and simultaneous power-down operation. Install shunts
across pins 1-2 of jumpers JU2 and JU11 to initiate a
power-up sequence. Install a shunt across pins 2-3 to
power down the channels and to assert RESET . See
Table 4 for jumpers JU2 and JU11 configuration.
Table 4. Jumpers JU2, JU11 Configuration
SHUNT
POSITION
1-2
2-3
OUT3 PULLUP VOLTAGE
Connects to CP_OUT through resistor
Connection dependent on jumpers JU1/JU10
configuration (see Table 3)
SHUNT
POSITION
1-2
2-3
EN INPUT SETTING
EN connected to resistor-divider (controllers
enabled)
EN = GND (controllers disabled)
MAX16050 Sequence Order
(JU4, JU5, JU6)
Jumpers JU4, JU5, and JU6 configure the MAX16050
sequencing order. The jumper settings allow up to 24
different power-up combinations. The MAX16051 does
not feature programmable power-supply sequencing
The voltage threshold of each analog EN input is config-
ured to 3.17V using resistors R1/R2 (U1) and R20/R22
(U2). Use the following equation to calculate a new R1 or
R20 resistor value to change the enable threshold:
and powers up in a fixed order from U2_OUT1–U2_
OUT5. See Table 6 to configure the sequencing order
for U1_OUT1–U1_OUT4.
R A = 16 . 5 x ?
? 1 ?
? V EN
? 0 . 5 V
?
?
Table 6. MAX16050 Sequencing Control (JU4, JU5, JU6)
SHUNT POSITION
SEQUENCE ORDER
JU4
Not installed
Not installed
Not installed
Not installed
Not installed
Not installed
Not installed
Not installed
Not installed
JU5
Not installed
Not installed
Not installed
2-3
2-3
2-3
1-2
1-2
1-2
JU6
Not installed
2-3
1-2
Not installed
2-3
1-2
Not installed
2-3
1-2
1ST
U1_OUT1
U1_OUT1
U1_OUT1
U1_OUT1
U1_OUT1
U1_OUT1
U1_OUT2
U1_OUT2
U1_OUT2
2ND
U1_OUT2
U1_OUT2
U1_OUT3
U1_OUT3
U1_OUT4
U1_OUT4
U1_OUT1
U1_OUT1
U1_OUT3
3RD
U1_OUT3
U1_OUT4
U1_OUT2
U1_OUT4
U1_OUT2
U1_OUT3
U1_OUT3
U1_OUT4
U1_OUT1
4TH
U1_OUT4
U1_OUT3
U1_OUT4
U1_OUT2
U1_OUT3
U1_OUT2
U1_OUT4
U1_OUT3
U1_OUT4
_______________________________________________________________________________________
5
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