MP5026

– 16V, 20A, 2.8mΩ RDS(ON), HOT-SWAP INTELLI-FUSE SOLUTION

MP5026 Rev. 1.0

MonolithicPower.com

19

7/5/2023

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© 2023 MPS. All Rights Reserved.

The device must meet the following conditions

to pull the PG signal high and for the system to

draw full power:

• V

OUT > 90% of VIN

• V

GS > 2V

• V

OUT > VIN - 0.5V

PG indicates low if the device meets any of the

following conditions:

• V

OUT < 75% of VIN

• EN/UV is low

• Faults occur

If a pull-up supply is present without an input,

PG remains logic low.

Fault Bar (FLTB)

Fault bar (FLTB) is an open-drain output that

indicate whether a fault has occurred. Pull

FLTB up to an external power supply or VCC

via a 10k

Ω to 100kΩ resistor.

FLTB is pulled low with an 8µs propagation

delay if any of the following protections are

triggered: OCP, SCP, OTP, OVP, or drain-to-

source (DS) or gate-to-source (GS) short

protection.

If any of these fault protections are triggered,

FLTB indicates low and latches. After the fault

condition is removed, the MP5026 can resume

normal operation by cycling the power on VIN,

VCC, or EN/UV.

If a DS short is detected, FLTB asserts low and

holds until VOUT drops below the DS short

detection falling threshold.

Additional Protections

The MP5026 provides additional protections,

including OTP, DS short detection, and GS

short detection.

Over-Temperature Protection (OTP)

The MP5026 senses the junction temperature

(TJ) internally. Once TJ exceeds 148°C, the

power

MOSFET

shuts

down

and

FLTB

indicates low.

Drain-to-Source (DS) Short Detection

The internal DS short detection circuit starts to

work when VIN and VCC exceed their respective

UVLO thresholds. Once the device enters tSS, it

no longer detects the DS short condition. If VOUT

exceeds the smaller value between VIN - 0.5V

and 90% of VIN during the detection period, the

internal DS short flag is set.

If the following conditions are met, a DS short

occurs:

•

Internal DS short flag is set

•

EN/UV is high

• t

IDT ends

Afterward, FLTB is pulled low, and the GATE

voltage remains low to disable the power

MOSFET.

DS short is a live protection. Once VOUT drops

below the smaller value between VIN - 0.7V and

75%

of

VIN,

the

device

resumes

normal

operation and FLTB releases high.

Gate-to-Source (GS) Short Detection

If the following conditions are met, the device

determines whether a GS short has occurred

and shuts down the power MOSFET:

• V

GATE < VCP - 0.9V

• V

SS > VCC - 0.7V

• No OC fault has occurred

• 200ms delay

Where VCP is the charge pump voltage.