MP23701 – 24V, 2A, 1.5MHZ, SYNCHRONOUS, STEP-DOWN, LED DRIVER

MP23701 Rev. 1.0

www.MonolithicPower.com

4

3/22/2019

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

© 2019 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

Typical values are VIN = 12V, TJ = 25°C, unless otherwise noted. Minimum and maximum values

are at VIN = 12V, TJ = -40°C to +125°C, unless otherwise noted, guaranteed by characterization.

Parameters

Symbol

Condition

Min

Typ

Max

Units

Supply Voltage

Operating range

VIN

After turn on

4.2

24

V

Turn-on threshold

VIN_ON

VIN rising edge

3.5

3.7

4

V

Hysteretic voltage

VIN_HYS

0.12

V

Supply Current

Shutdown current

ISD

VEN = 0V

10

50

μA

Quiescent current

IQ

VEN = 2V, VFB = 200mV

0.9

1.1

mA

Enable and Dimming (EN/DIM)

EN/DIM off threshold

VEN_OFF

VEN/DIM falling edge

0.27

0.31

0.35

V

EN/DIM on threshold

VEN_ON

VEN/DIM rising edge

0.545

0.59

0.635

V

Turn-off delay time

tOFF_DELAY

16

22

28

ms

EN/DIM pull-up current

IEN/DIM

VEN = 0V

2.8

3.8

5.3

μA

Max analog dimming threshold

VADIM_MAX

Theoretically, VFB = 100mV

1.31

1.44

1.57

V

Min analog dimming threshold

VADIM_MIN

VFB = 5mV

0.63

0.7

0.78

V

Feedback (FB)

Feedback voltage

VFB

4.2V ≤ VIN ≤ 24V

93

100

107

mV

Feedback current

IFB

VFB = 150mV

30

75

nA

Power Switch

High-side MOSFET on

resistance

RDS(ON)_H

VIN = 5.0V

100

170

mΩ

VIN = 4.2V

110

180

mΩ

Low-side synchronous rectifier

switch on resistance

RDS(ON)_L

VIN = 5.0V

80

140

mΩ

VIN = 4.2V

90

150

mΩ

Switch leakage

ISW_LKG

VEN = 0V, VSW = 0V

1.5

μA

High-side current limit

ILIMIT_H

When high-side switch turns on

3.5

5

6.6

A

Low-side current limit

ILIMIT_L

When low-side switch turns on

-890

-630

-330

mA

OCP current threshold

IOCP

Both for high-side and low-side

3.6

5.5

7

A

Oscillator frequency

fSW

VFB = 80mV

1.24

1.42

1.6

MHz

Maximum duty cycle

DMAX

VFB = 80mV

84

89

%

Minimum on time

tON_MIN

70

ns

Restart Timer

Hiccup timer at fault condition

tSTART

2.4

ms

Bootstrap

Bias voltage for high-side

driver

VBST-VSW

5.5V ≤ VIN ≤ 24V

4.8

5.1

5.5

V

VIN = 4.2V

3.6

V