MP5921

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

MP5921 Rev. 1.1

www.MonolithicPower.com

6

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

Supply Current

Quiescent current

IQ

Intelli-Fuse on, no load

1.8

2.7

mA

Fault latch off

1.5

2.4

mA

Intelli-Fuse off, VIN = 16V

1.6

2.5

mA

VDD3 Regulator and Under-Voltage Lockout (UVLO)

VDD3 regulator output voltage

VDD3

IVDD3 = 0mA

2.855

3.05

3.245

V

VDD3 regulator load capability

IVDD3

VOL = VDD3 - 40mV

14

15

16

mA

VDD3 under-voltage lockout threshold

rising

VDDVTH

2.28

2.41

2.54

V

VDD33 under voltage lockout

threshold falling

VDDVTL

1.9

2.04

2.18

V

VDD3 under-voltage lockout threshold

hysteresis

VDDHYS

370

mV

VIN Under-/Over-Voltage Protection (UVP, OVP)

VIN under-voltage lockout threshold

rising

VINVTHR

2.74

2.91

3.08

V

VIN under-voltage lockout threshold

falling

VINVTHF

2.38

2.58

2.78

V

VIN over-voltage protection

VINOVP

17

18.5

20

V

Power MOSFET

On resistance

RDS(ON)

TJ = 25°C

1

1.25

mΩ

TJ = 125°C (5)

1.35

1.625

Off-state leakage current

IOFF

VIN = 16V, power FET off

1

μA

Short-Circuit Current Limit

Short-circuit current limit (5)

ILimitSC

80

100

120

A

Short-circuit protection response time

(5)

tSC

200

ns

Current Limit Reference (CLREF)

Internal CLREF current

ICLREF

8.5

10

11.5

μA

CLREF internal max current limit

clamp

VCLREF̲_CLAMP

VBE at VOUT < 80%VIN,

TJ = 25°C

570

635

699

mV

VBE at VOUT < 80 VIN,

TJ = 125°C (5)

370

440

510

mV

VOUT

≥ 80%VIN

1.44

1.6

1.76

V

CLREF over-current regulation time

tCL_REG

VOUT

≥ 90%VIN,

CLREF

≥ 0.3V

120

180

265

μs

Short-circuit start-up protection timer

tSC_TIMER

VOUT

<

1/8VIN,

power

FET current is regulated

by VBE

2.1

3.2

ms

Current Sense Output (CS)

CS sense gain

IOUT > 5A

9.7

10

10.3

μA/A

CS sense gain offset

IOUT > 5A

-2.5

2.5

μA

Over-current D_OC high to low

threshold

VDOC_TH

VOUT

≥ 90%VIN,

0.3V

≤ CLREF ≤ 1.6V

0.8

0.85

0.9

VCLREF