MP4571

– 60V, 1A, SYNCHRONOUS STEP-DOWN CONVERTER

MP4571 Rev. 1.1

www.MonolithicPower.com

7

2/22/2023

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

© 2023 MPS. All Rights Reserved.

Electrical CharacteristicS

VIN = 24V, VEN = 2V, TJ = -40°C to +125°C (6), typical values are at TJ = 25°C, unless otherwise

noted.

Parameters

Symbol

Condition

Min

Typ

Max

Units

Input Supply and UVLO

Supply current

(quiescent)

IQ

No load, VFB = 0.85V, AAM

40

65

μA

Supply current

(shutdown)

ISD

VEN = 0V

2

5

μA

VIN under-voltage lockout

rising threshold

INUVVth-R

3.8

4.0

4.2

V

VIN under-voltage lockout

falling threshold

INUVVth-F

3.3

3.5

3.7

V

VIN UVLO threshold

hysteresis

INUVHYS

500

mV

Output and Regulation

Regulated FB reference

VREF

TJ = 25°C

0.792 0.800 0.808

V

TJ = -40°C to +125°C

0.784

0.816

V

FB input current

IFB

VFB = 0.85V

10

50

nA

Switches and Frequency

High-side switch on

resistance

RDSON-H

VBST - VSW = 5V, TJ = 25°C

150

250

350

mΩ

VBST - VSW = 5V, TJ = -40°C to +125°C

100

500

Low-side switch on

resistance

RDSON-L

TJ = 25°C

30

45

60

mΩ

TJ = -40°C to +125°C

20

90

SW leakage current

ISW-LKG

VEN = 0V, VSW = 0V or 60V

0.1

30

μA

Switching frequency

fSW

RFREQ

= 76.8kΩ

300

400

500

kHz

RFREQ

= 28kΩ

750

1000

1250

kHz

RFREQ

= 12.1kΩ

1800

2200

2700

kHz

Minimum on time (7)

tON-MIN

90

ns

Minimum off time (7)

tOFF-MIN

100

ns

Power Good (PG) Indicator

PG sink current capacity

VPG-SINK

Sink 4mA

300

mV

PG delay time

tPG-DELAY

Rising edge

70

μs

Falling edge

25

μs

PG leakage current

IPG-LKG

10

1000

nA

PG rising threshold

(VFB / VREF)

PGRISING

VFB rising

90

%

VFB falling

108

%

PG falling threshold

(VFB / VREF)

PGFALLING

VFB falling

84

%

VFB rising

116

%

Enable (EN) Control

EN input rising threshold

VEN-RISING

1.38

1.45

1.52

V

EN input falling threshold

VEN-FALLING

1.05

1.12

1.19

V

EN threshold hysteresis

VEN-HYS

330

mV

EN input current

IEN

VEN = 2V

0.7

μA

EN turn-off delay

tEN-DELAY

5

μs

BST

BST-SW UVLO

1.4

2.5

V

BST-SW UVLO

hysteresis

60

mV

Soft Start and VCC

Soft-start time

tSS

0.45

ms

VCC regulator

VCC

ICC = 0mA

4.6

4.9

5.2

V