EN_HOLD (JU7, JU15)

Jumpers JU7 and JU15 configuration setting allows the

MAX16050 and MAX16051 to ignore high-to-low transi-

tions at the EN and SHDN inputs. Place a shunt across

pins 1-2 for normal operation of the EN and SHDN fea-

ture. Place a shunt across pins 2-3 to ignore high-to-low

transitions at EN and SHDN. See Table 7 for jumpers

JU7 and JU15 configuration.

SHDN Control (JU8, JU13)

Jumpers JU8 and JU13 initiate the MAX16050 and

MAX16051 for a reverse-sequencing event. Install

shunts on jumpers JU8 and JU13 to initiate a reverse-

sequencing event. Remove the shunts at jumpers JU8

and JU13 for proper power-up operation when EN =

high. To drive SHDN externally, place a square-wave

signal with a 2V to 5.5V logic-high level at pin 1 of

jumpers JU8 or JU13. See Table 8 for jumpers JU8 and

JU13 configuration.

FAULT Control (JU9, JU14)

Jumpers JU9 and JU14 control the MAX16050 and

MAX16051 input/output FAULT signal, respectively.

FAULT asserts low when any of the monitored IN volt-

ages fall below its SET voltage threshold. As an output,

FAULT can be driven externally to initiate a simultane-

ous power-down of the DC-DC controllers. Install a

shunt across jumpers JU9 and JU14 to initiate a shut-

down of the controllers. To drive FAULT externally,

place a square-wave signal with a 2V to 5.5V logic-high

level at pin 1 of jumpers JU8 or JU14. Connect the sig-

nal ground to a convenient ground reference. See

Table 9 for jumpers JU9 and JU14 configuration.

MAX16050 Evaluation Kit

6

_______________________________________________________________________________________

Table 8. Jumpers JU8, JU13 Configuration

SHUNT

POSITION

SHDN INPUT SETTING

Not

installed

Controller enabled or externally driven

Installed

Reverse power-down sequencing. RESET

asserts low.

Table 9. Jumpers JU9, JU14 Configuration

SHUNT

POSITION

FAULT INPUT SETTING

Not

installed

Normal operation

Installed

Disables controller. Initiates simultaneous power

down of OUT_. RESET asserts low.

Table 7. Jumpers JU7, JU15 Configuration

SHUNT

POSITION

EN_HOLD INPUT SETTING

1-2

Normal operation of EN and

SHDN functions

2-3

Ignores high-to-low transitions at EN and

SHDN

Table 6. MAX16050 Sequencing Control (JU4, JU5, JU6) (continued)

SHUNT POSITION

SEQUENCE ORDER

JU4

JU5

JU6

1ST

2ND

3RD

4TH

2-3

Not installed

Not installed

U1_OUT2

U1_OUT3

U1_OUT4

U1_OUT1

2-3

Not installed

2-3

U1_OUT2

U1_OUT4

U1_OUT1

U1_OUT3

2-3

Not installed

1-2

U1_OUT2

U1_OUT4

U1_OUT3

U1_OUT1

2-3

2-3

Not installed

U1_OUT3

U1_OUT1

U1_OUT2

U1_OUT4

2-3

2-3

2-3

U1_OUT3

U1_OUT1

U1_OUT4

U1_OUT2

2-3

2-3

1-2

U1_OUT3

U1_OUT2

U1_OUT1

U1_OUT4

2-3

1-2

Not installed

U1_OUT3

U1_OUT2

U1_OUT4

U1_OUT1

2-3

1-2

2-3

U1_OUT3

U1_OUT4

U1_OUT1

U1_OUT2

2-3

1-2

1-2

U1_OUT3

U1_OUT4

U1_OUT2

U1_OUT1

1-2

Not installed

Not installed

U1_OUT4

U1_OUT1

U1_OUT2

U1_OUT3

1-2

Not installed

2-3

U1_OUT4

U1_OUT1

U1_OUT3

U1_OUT2

1-2

Not installed

1-2

U1_OUT4

U1_OUT2

U1_OUT1

U1_OUT3

1-2

2-3

Not installed

U1_OUT4

U1_OUT2

U1_OUT3

U1_OUT1

1-2

2-3

2-3

U1_OUT4

U1_OUT3

U1_OUT1

U1_OUT2

1-2

2-3

1-2

U1_OUT4

U1_OUT3

U1_OUT2

U1_OUT1