MP86905

– INTELLI-PHASE SOLUTION W/ INTEGRATED MOSFETS AND DRIVERS

MP86905 Rev. 1.1

www.MonolithicPower.com

11

8/31/2020

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Fault Report (FAULT#)

FAULT# is an open-drain, active-low signal that

reports faults from the Intelli-Phase. When any

fault occurs, FAULT# is pulled low.

FAULT# monitors three fault events:

1) Over-current limit: To trip the over-current

fault, the current limit must be exceeded

four consecutive times. Once the fault

occurs, the MP86905 latches off to turn off

the HS-FET. The LS-FET turns off when

the inductor current reaches zero.

2) Over-temperature fault at TJ > 160°C: Once

the fault occurs, the MP86905 latches off to

turn off the HS-FET. The LS-FET turns off

when the inductor current reaches zero.

3) SW to PGND shorted: Once the fault

occurs, the part latches off to turn off the

HS-FET.

The fault latch can be released by recycling

VIN, VDD, or toggling EN.

L1

PWM

IntelliPhase

PWM1

L2

PWM

VIN

VIN

PWM2

VTEMP

VIN

VIN

VTEMP

IntelliPhase

Intelli-Phase

Power Stage

VOUT

COUT

Multi-Phase

Controller

Temperature

ADC

Figure 2: Multi-Phase Temperature Sense Utilization