MPQ4480 – 36V, 6A, SYNC STEP-DOWN CONVERTER FOR AEC1-Q100 QUALIFIED

MPQ4480 Rev. 1.0

www.MonolithicPower.com

6

7/2/2019

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© 2019 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

VIN = 12V, VEN = 5V, TJ = -40°C to +125°C, typical value is tested at TJ = 25°C, unless otherwise

noted.

Parameter

Symbol

Condition

Min

Typ

Max Units

Supply current (shutdown)

IIN

VEN = 0V, TJ = -40°C to +125°C

15

25

μA

Supply current (quiescent)

IQ2

No switching

1

2

mA

EN rising threshold

VEN_Rising

1.96 2.06

2.16

V

EN hysteresis

VEN_HYS

200

mV

EN pull-up current

IEN

VEN = 3V

3

7

11

μA

Thermal shutdown (7)

TSTD

165

C

Thermal hysteresis (7)

TSTD_HYS

20

C

VCC regulator

VCC

4.65 5.05

5.45

V

VCC load regulation

VCC_LOG

ICC = 50mA

1

3

%

Step-Down Converter

VIN under-voltage lockout

threshold rising

VIN_UVLO

3.7

3.95

4.2

V

VIN under-voltage lockout

threshold hysteresis

VUVLO_HYS

500

mV

HS switch on resistance

RDSON_HS

20

40

mΩ

LS switch on resistance

RDSON_LS

15

35

mΩ

Feedback voltage

VFB

0.985

1

1.015

V

Low-side current limit (7)

ILS_LIMIT

-2

A

Switch leakage

SWLKG

VEN = 0V, VSW = 36V, TJ = 25°C

1

μA

VEN = 0V, VSW = 36V,

TJ = -40°C to +125°C

5

High-side current limit

ILIMIT1

ILIM = GND

8

17

27

A

ILIM = VCC

12

22

35

Output CC current limit

ILIMIT2

ILIM = VCC (for 6A continuous),

TJ = 25°C

6.6

7.5

8.4

A

ILIM = float (for 3A continuous),

TJ = 25°C

3.3

3.75

4.2

ILIM = GND (for 2.4A continuous),

TJ = 25°C

2.5

2.75

3

Oscillator frequency

fSW1

RFREQ = 97.6kΩ

170

235

300

kHz

fSW2

RFREQ = 9.53kΩ

1800 2200 2600

fSW3

RFREQ = 52.3kΩ

350

440

530

Frequency spread spectrum

(7) (MPQ4480GV-FD-AEC1)

fSS

RFREQ = float, based on 450kHz

10

%

Sync frequency range

FREQSYNC_IN

300

2100

kHz

Maximum on time

tON_MAX

Dropout mode, max duty cycle

DMAX = tON_MAX / (tON_MAX + tOFF_MIN)

6

10

μs

Minimum off time

tOFF_MIN

120

ns

Minimum on time (7)

tON_MIN

130

ns