Technical Note

2/16

BD9018KV

www.rohm.com

2010.02 - Rev.A

○

c

2010 ROHM Co., Ltd. All rights reserved.

●

Recommend operating range (Ta=25℃)

Parameter

Symbol

Min.

Typ.

Max.

Unit

Input voltage 1

VCC,EXTVCC

12

30

V

Input voltage 2

VCCCL

12

VCC

V

BOOT－SW voltage

BOOT－SW

3.9

5

VREG5

V

Oscillator frequency

OSC

250

300

550

kHz

Synchronous frequency

SYNC

OSC

-

kHz

Synchronous frequency

pulse width (ON Time)

Ton

0.2

1/(2×SYNC)

-

μ

sec

Synchronous frequency

pulse width (OFF Time)

Toff

0.2

1/(2×SYNC)

-

μ

sec

*1 In case of using less than 6V, Short VCC, EXTVCC and VREG5.

Moreover, it is the voltage range when 4.5V or greater is once supplied to the input.

*2 Should not exceed OSC×2

★

This product is not designed to provide resistance against radiation.

●

Parameter

Symbol

Limit

Unit

Conditions

Min.

Typ.

Max.

VIN bias current

IIN

-

5

10

mA

Shutdown mode current

IST

-

0

10

μ

A

EN1,EN2=0V , VREG5 OFF

EN1,2 low voltage

VENth1

GND

-

1.0

V

When each EN is OFF,

each ch is OFF

EN1,2 high voltage

VENth2

2.6

-

Vcc

V

When EN is ON,

each ch is ON

EN1,2 input current

IEN

12

23

48

μ

A

VEN=5V

［

VREG5 Block］

VREG5 output voltage

VREG5

4.7

4.95

5.2

V

［

Under Voltage Lock Out Block］

VREG5 threshold voltage

VREG_UVLO

3.5

3.7

3.9

V

VREG5 hysteresis voltage

DVREG_UVLO

100

200

400

mV

［

Oscillator］

Oscillator frequency

FOSC

270

300

330

kHz

RT=100 kΩ

Synchronous frequency

Fsync

-

500

-

kHz

RT=100 kΩ,SYNC=500kHz

SYNC pulse low voltage

Vsynclow

GNC

-

0.5

V

SYNC pulse high voltage

Vsynchigh

2.5

-

7

V

SYNC input current

Isync

10

20

40

μ

A

Vsync=5V

［

Error Amp Block］

VO input bias current

IVo+

-

-

1

μ

A

Feedback reference voltage

VOB

0.792

0.800

0.808

V

［

Soft start block］

Charge current

ISS

6.5

10

13.5

μ

A

VSS=1V

Discharge current

IDIS

0.6

1.7

3

mA

VSS=1V,VCC=3V

Maximum voltage

Vss_MAX

2.05

2.25

2.45

V

Standby voltage

Vss_STB

-

-

0.3

V

VCC=0.3V

［

Over Current Protection Block］

CL threshold voltage

Vswth

70

90

110

ｍ

V

CL input current 1,2

Iswin

-

-

10

μ

A

Output short detection voltage

Vosh

0.46

0.56

0.66

V

VFB

Output short release voltage

Vodet

0.51

0.61

0.71

V

VFB

［

PGOOD］

PGOOD output L current

IPGOODL

0.56

0.7

-

mA

PGOOD=1V,FB=0V

PGOOD output H current

IPGOODH

-

0

3

μ

A

PGOOD=5V

Over voltage detection voltage

0.874

0.92

0.966

V

VFB