MP5991

– 16V, 50A, 1mΩ RDS(ON), HOT-SWAP INTELLI-FUSE SOLUTION

MP5991 Rev. 1.0

MonolithicPower.com

28

4/27/2022

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© 2022 MPS. All Rights Reserved.

An output voltage clamp diode is required on

the output to limit negative transients. Select a

Schottky diode with a low forward voltage.

Parallel Operation

The MP5991 can work in parallel operation to

support higher currents (maximum 20-phase

operation).

The

following

connections

and

conditions are required to support multi-phase

parallel operation (see Figure 2 on page 3 for

more details):

• Connect the VIN pins to the same input bus

• Connect the VOUT pins to the same output

bus

• Tie the ON pins together for start-up

sequence control

• Tie the SS pins together for soft-start

sequence control

• Tie the GOK pins together for system fault

control

• Design the current-sense resistor (R

CS) to

have the same resistance in each phase

• Tie the IMON pins together, and design the

total system

’s IMON resistance to equal RCS

/ N (where N is the number of phases) for

soft-start current-balance control

• Tie the OCREF pins together

• Select the same mode for all phases

• Tie the VTEMP pins together to report the

highest TJ of all the phases

• Tie the FLT_TYPE pins together to indicate

the highest-priority fault