MP4575

– 5A, 55V, SYNCHRONOUS, STEP-DOWN CONVERTER

MP4575 Rev. 1.0

www.MonolithicPower.com

5

8/16/2016

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ELECTRICAL CHARACTERISTICS

Parameter

Symbol Condition

Min

Typ

Max

Units

Error Amplifier (EA)

Feedback voltage

4.5V

≤ VIN ≤ 55V

0.98

1

1.02

V

FB current

10

50

nA

Error amp transconductance

380

540

720

μA/V

COMP sink/source current

10

20

30

μA

Switch Characteristic

Upper switch on resistance

90

160

mΩ

Lower switch on resistance

70

120

mΩ

Upper switch leakage

10

300

nA

Current Limit

Peak current limit

10% duty cycle

5.5

8.5

11

A

Quiescent Supply

Quiescent supply current

No load, without switching

450

670

µA

Shutdown supply current

7

12

µA

VDD Regulator

VDD regulator output voltage

BIAS = NC

3.4

3.6

3.8

V

VDD regulator output voltage

BIAS = external 5V power

4.6

4.8

V

Threshold Voltage

EN rising threshold

1.4

1.6

1.8

V

EN falling threshold

1.1

1.3

1.5

V

EN threshold hysteresis

300

mV

VIN UVLO rising threshold

3.7

3.9

4.1

V

VIN UVLO falling threshold

3.3

3.5

3.7

V

VIN UVLO threshold hysteresis

400

mV

Soft Start (SS)

External soft start capacitor

charging current

2.5

4

5.5

μA

PWM Comparator

100

ns

90

ns