8

Item

Drain-source breakdown voltage

High Side MOSFET

Control IC

Zero gate voltage drain current

Static drain-source on-state resistance

Source-drain diode forward voltage

Supply ｃurrent (f=100kHz)

Supply ｃurrent (f=300kHz)

Supply current at remote OFF

Undervoltage lockout threshold (start)

Undervoltage lockout hysteresis

Line regulation

Remote control ON input voltage

Remote control source current

Symbol

Icc＿off

Vcc＿start

Vcc＿hys

REG-IN

Condition

Vcc＝4.5V to 20V

Vcc＝4.5V to 20V

Vcc＝4.5V to 20V

−

−

Vcc＝4.5V to 20V

Vcc＝5V

Vcc＝5V

MIN

22

22

−

−

−

−

−

−

−

−

25

5

3.3

−

−

4.1

0.4

−

−0.2

−

TYP

4.3

0.5

−

−

2

MAX

10

55

1.5

3.9

5.9

50

4.5

0.6

30

0.7

10

Soft-start source current

Vcc＝5V

−3

−2.5

−2

Units

V

μA

mΩ

V

mA

mA

μA

V

V

Bootstrap voltage

Vboot

3.84

4

4.16

V

Line regulation

Vcc＝4.5V to 20V

−

−

30

mV

Load regulation

Vcc＝5V

−

−

30

mV

Dty＿max

Vcc＝5V

85

90

95

%

Reference voltage

Vref

Vcc＝5V

3.84

4

4.16

V

mV

V

Vcc＝5V

2−

Vcc

V

μA

Error amplifier reference voltage

Vamp

Vcc＝5V

0.784

0.8

0.816

V

Threshold of over current limit at Ron detection Ith＿OCL1

Vcc＝5V

3−

−

A

Timer current

Itimer

Vcc＝5V

−40

−33

−26

μA

Soft-start input voltage before timer starting

Vcc＝5V

2.75

2.9

3.05

V

Threshold of latch

Vth＿lat

Vcc＝5V

3.3

3.45

3.6

V

Output voltage accuracy (Vo=0.8V)

Vcc＝4.5V to 20V

0.784

0.800

0.816

V

μA

Drain-source breakdown voltage

Low Side MOSFET

Zero gate voltage drain current

Static drain-source on-state resistance

Source-drain diode forward voltage

22

22

−

−

−

−

−

−

−

10

55

1.5

V

μA

mΩ

V

Vcc＝5V

Thermal shutdown temperature

T＿TSD

−

Load regulation

Initial frequency2 accuracy

fosc＿2

Vcc＝5V

255

300

345

REG-L

Vcc＝5V

−

−

30

mV

Initial frequency1 accuracy

fosc＿1

Vcc＝5V

85

100

115

kHz

kHz

Maximum duty cycle

℃

−

140

−

Item

Symbol

Input voltage

Thermal Ratings

Junction temperature

Tj

Ratings

22

150

110

30

Units

V

Vref sink current

Iref

−3

mA

Amp- input voltage

Vamp -

Vref

V

OSC input voltage

Vref

V

Remote control voltage

V

Vboot sink current

Iboot

−30

mA

5.5

V

Output current（peak）

4

A

Output current（ave）

3

A

Main MOSFET input voltage

22

V

1.5

W

1.1

W

Operating temperature

T a - ope

−30 to 85

℃

Storage temperature

Tstg

−40 to 150

℃

℃

℃/W

℃/W

55

℃/W

87

℃/W

Input/Output Ratings

Item

Symbol

Recommendation

Units

Junction temperature

Tj

−30 to 125

℃

Input voltage

4.5 to 20

V

Output voltage setting range

0.8 to 14

V

※2 The measurement result in the center of case.

※3 PD1,θja1,θjc1 are the values of the power dissipation and thermal registance when electifying to a single internal element.

PD2,θja2,θjc2 are the values of the power dissipation and thermal registance when electifying to two internal element.

※4

Input voltage at the time of power supply operation.

※5

Output voltage at the time of power supply operation.

MD3221R

U097−2

Absolute Maximum Ratings

Unless otherwise specified : Ta=25ºC

Recommended Operating Conditions

Electrical Characteristics

Unless otherwise specified : Ta=25ºC