MPQ4431

– 36V, 1A, LOW IQ, SYNC, STEP-DOWN CONVERTER, AEC-Q100

MPQ4431 Rev. 1.0

www.MonolithicPower.com

4

3/21/2017

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© 2017 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

Parameter

Symbol

Condition

Min

Typ

Max

Units

VIN quiescent current

10

18

µA

switching,

25

µA

VIN shutdown current

1

5

µA

VIN under-voltage lockout

threshold rising

2.4

2.8

3.2

V

VIN under-voltage lockout

threshold hysteresis

150

mV

Feedback reference voltage

784

800

816

mV

792

800

808

mV

Switching frequency

Ω or from sync

clock

400

475

550

kHz

Ω or from sync clock

850

1000

1150

kHz

Ω or from sync clock

2250

2500

2750

kHz

80

ns

SYNC input low voltage

0.4

V

SYNC input high voltage

1.8

V

Current limit

Duty cycle = 40%

2.1

2.5

2.9

A

Low-side valley current limit

1.1

1.35

1.6

A

ZCD current

50

mA

Reverse current limit

1.5

A

Switch leakage current

0.01

1

µA

HS switch on resistance

90

155

m

Ω

LS switch on resistance

80

145

mΩ

Soft-start current

5

10

15

µA

EN rising threshold

0.9

1.05

1.2

V

EN threshold hysteresis

120

mV

85

90

95

%

105

110

115

79

84

89

%

113.5

118.5

123.5

%

PG deglitch timer

PG from low to high

30

µs

PG from high to low

50

µs

PG output voltage low

0.2

0.4

V

VCC regulator

5

V

VCC load regulation

3

%

170

°C

20

°C

NOTE:

4)

Not tested in production, guaranteed by design and characterization.