BD□□KA5,BD□□KA5W Series,BD00KA5W Series

Technical Note

4/9

www.rohm.com

2009.04 - Rev.A

© 2009 ROHM Co., Ltd. All rights reserved.

●

Block diagrams, Standard circuit examples

Pin No.

PinName

Function

1

CTL

Output voltage ON/OFF control

2

Vcc

Power supply voltage input

3

N.C.

Unconnected terminal

4

OUT

Voltage output

5

ADJ

Output voltage configuration terminal

FIN

GND

GND

Pin No.

Pin Name

Function

1

OUT

Voltage output

2

ADJ

Output voltage configuration terminal

3

N.C.

Unconnected terminal

4

5

CTL

Output voltage ON/OFF control

6

GND

GND

7

8

Vcc

Power supply voltage input

Pin No.

Pin Name

Function

1

CTL

Output voltage ON/OFF control

2

Vcc

Power supply voltage input

3

N.C.

Unconnected terminal

4

OUT

Voltage output

5

N.C.

Unconnected terminal

FIN

GND

GND

Pin No.

Pin Name

Function

1

OUT

Voltage output

2

N.C.

Unconnected terminal

3

4

5

CTL

Output voltage ON/OFF control

6

GND

GND

7

8

Vcc

Power supply voltage input

Pin No.

Pin Name

Function

1

Vcc

Power supply voltage input

2

N.C.

Unconnected terminal

3

OUT

Voltage output

FIN

GND

GND

1

8

4

5

TOP VIEW

SOP8

1

8

4

5

TOP VIEW

SOP8

TOP VIEW

FIN

1

3

2

4 5

TO252-5

TOP VIEW

1

3

2

4 5

TO252-5

TOP VIEW

1

3

2

TO252-3

FIN

FIN

N.C. pins are electrically open to the inside of the IC chip.

Driver

Driver

Driver

Driver

Driver

OCP

OCP

OCP

OCP

OCP

TSD

TSD

TSD

TSD

TSD

Vref

Vref

Vref

Vref

Vref

GND(FIN)

GND(FIN)

GND(7PIN)

GND(6PIN)

CTL (5PIN)

Vcc(8PIN)

1μF

R1

R2

OUT(1PIN)

N.C.(3PIN)

N.C.(3PIN) N.C.(4IN)

1μF

GND(7PIN)

GND(6PIN)

CTL (5PIN)

Vcc(8PIN)

1μF

OUT(1PIN)

N.C.(3PIN) N.C.(4IN)

1μF

ADJ(2PIN)

R1

R2

OUT (4PIN)

R1

R2

ADJ(5PIN)

N.C.(3PIN)

Vcc (2PIN)

CTL (1PIN)

R2

R1

R2

R1

OUT (4PIN)

N.C.(3PIN)

Vcc (2PIN)

CTL (1PIN)

N.C.(5PIN)

1μF

1μF

1μF

1μF

1μF

1μF

OUT (3PIN)

N.C.(2PIN)

Vcc (1PIN)

Fig.13

Fig.14

Fig.15

TO252-5(BD00KA5WFP)

[BD00KA5WFP]

＊

Output voltage configuration

VOUT=VADJ×（R1+R2）÷R1(V)

：

VADJ=0.75V(Typ.)

：

A value of approximately 30kΩ

is recommended for R1.

TO252-5(BD□□KA5WFP)

[BD□□KA5WFP]

TO252-5(BD□□KA5FP)

SOP8(BD00KA5WF)

[BD00KA5WF]

SOP8(BD□□KA5WF)

[BD□□KA5WF]

＊

Output voltage configuration

VOUT=VADJ×（R1+R2）÷R1(V)

：

VADJ=0.75V(Typ.)

：

A value of approximately 30kΩ

is recommended for R1.

Fig.16

Fig.17