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Datasheet

Datasheet

BD555BKFV

TSZ02201-0W1W0C300010-1-2

© 2013 ROHM Co., Ltd. All rights reserved.

30.July.2013 Rev.003

www.rohm.com

TSZ22111

・15・001

●Absolute Maximum Ratings

Parameter

Symbol

Maximum rating

Unit

Supply voltage (SUP terminal)

40

V

Internal supply regulator voltage (VDDH terminal)

15.5

V

SW output current

600

*1

mA

BLDR output current

60

*1

mA

WLBD, ISNS terminal voltage

15.5

V

WBLD input current (strong load current)

300

*2

mA

DIM, DET, OSC, REF, FB terminal voltage

4.5

V

4.0

mA

ISYS, PGND terminal voltage

+/- 0.5

V

Operating frequency

400

kHz

Maximum power dissipation

0.87

*4

W

Operating ambient temperature range

-40 ～ +110

°C

Storage temperature range

-55 ～ +150

°C

Maximum junction temperature

+150

°C

*1

*2

never exceed 0.8*Pd

*3

*4

3

Notice1: Due to in case of the applied voltage or operating ambient temperature range or etc. exceed the absolute maximum ratings, a damage maybe

occurs, and the damage mode (short or open or etc.) can not be supposed, please take a physical safety measure (such as add a fuse) while some special

modes in which the absolute maximum ratings may be exceeded are considered.

Notice2: The power dissipation in BD555BKFV is mainly decided by the switching frequency of the DCDC converter and the current which is applied to the

BLDR pin. Please make the power dissipation caused by those less than 80% of the maximum power dissipation of the package.

●Recommended Operating Range (Ta= -40 ~ +110°C)

Parameter

Symbol

Range

Unit

Supply voltage

VSUP

16 ~ 39

V

●Electrical Characteristics

Parameter

Symbol

Limits

Unit

Comments

Min.

Typ.

Max.

Internal Supply Regulator*

1

Startup current

-

0.4

0.8

mA

In UVLO condition

Supply current ON

-

0.8

1.0

mA

No switching.

Supply current ON 1

-

1.0

1.3

mA

Supply current ON 2

-

2

2.4

mA

VDDH internal regulator voltage

10.0

11.5

15.0

V

UVLO release voltage

9.20

10.0

10.8

V

VDDH rising

UVLO trigger voltage

V

VDDH falling

UVLO hysteresis

0.75

1.00

1.25

V

Switching regulator

Minimum frequency

32

40

48

kHz

for frequency range 40KHz to 400KHz.

Maximum frequency

320

400

480

kHz

SW maximum duty cycle

70

75

80

%