MP5921

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

MP5921 Rev. 1.1

www.MonolithicPower.com

7

5/17/2022

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© 2022 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

VIN = 12V, RCS = 2kΩ, RIMON = 2kΩ, TA = 25°C, unless otherwise noted.

Parameters

Symbol

Condition

Min

Typ

Max

Units

VTEMP

VTEMP sense gain (5)

Sense range 0 - 140

°C

8

8.7

9.4

mV/ °C

VTEMP sense output (5)

TJ = 25°C

370

mV

Soft Start (SS)

SS pull-up current

ISS

VIN = 12V, ISS dependent

VIN

13

15

17

μA

Current Monitor Output (IMON)

IMON sense gain

IOUT > 5A

9.7

10

10.3

μA/A

IMON sense gain offset

IOUT > 5A

-2

2

μA

ON/PD

Internal ON/PD current

ION_PD

3.2

4.2

5.2

μA

FET on insertion delay time

TDLY_ON

VIN and VDD3 > UVLO

1.3

1.8

ms

FET on input rising threshold

VON_vth

ON/PD rising

1.26

1.4

1.54

V

FT on hysteresis

VON_hys

200

mV

FET on to PD mode threshold

VPD_vth_fall

ON/PD falling

1.08

1.2

1.32

V

PD mode to off mode threshold

VOFF_vth_fall

ON/PD falling

0.68

0.76

0.84

V

PD mode pull-down resistor

RPD

250

500

750

Ω

PD mode pull-down delay time

tPD_DLY

2.1

3.2

ms

Thermal Shutdown

Over-temperature shutdown and GOK

fault flag

tSTD

143

°C

GOK Output

Output low voltage

VOL_GOK

Sink current 1mA

0.2

V

GOK bar off-state leakage current

IGOK_LKG

VGOK = 3.3V

1

μA

D_OC Output

Output low voltage

VOL_DOC

Sink current 1mA

0.2

V

D_OC bar off-state leakage current

IDOC_LKG

VD_OC = 3.3V

1

μA

FET Short Detection

GOK fault flag for FET drain-to-source

short

VOUT_DSTH

Measured at VOUT during

start-up

85%

90%

95%

VIN

GOK release high flag when drain-to-

source short is removed

VOUT_GOKH

70%

74%

VIN

Maximum soft-start time

TSS_MAX

After ON_PD goes high, if

VOUT < 90%VIN within

270ms, indication of fuse

is not fully on

200

270

340

ms

NOTE:

5) Guaranteed by design.