MP4570 – 3A, 55V, SYNCHRONOUS STEP DOWN CONVERTER

MP4570 Rev. 1.01

www.MonolithicPower.com

5

1/4/2017

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2017 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

Parameter

Symbol Condition

Min

Typ

Max

Units

Error Amplifier

Feedback Voltage

0.98

1

1.02

V

FB Current

10

50

nA

Error AMP Transconductance

430

630

730

μA/V

COMP Sink/Source Current

13

30

52

μA

Switch Characteristic

Upper Switch On Resistance

90

120

mΩ

Lower Switch On Resistance

70

100

mΩ

Upper Switch Leakage

10

300

nA

Current Limit

Peak Current Limit

10% Duty Cycle

4.5

5.7

7.5

A

Quiescent Supply

Quiescent Supply Current

No load, Without Switching

450

550

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

External

Soft

Start

Capacitor

Charging Current

2.5

4

5.5

μA

PWM Comparator

Minimum Off Time

(4)

100

ns

Minimum On Time

(4)

90

ns