Technical Note

4/9

BD3925FP-C,BD3925HFP-C

www.rohm.com

2011.03 - Rev.B

© 2011 ROHM Co., Ltd. All rights reserved.



Block Diagram

TO252-5

HRP5

Pin No.

Pin Name

Function

Pin No.

Pin Name

Function

1

Vcc

Power supply pin

1

Vcc

Power supply pin

2

SW

Vo on/off function pin

2

SW

Vo on/off function pin

3

N.C.

No Connection

3

GND

Grand

4

ADJ

Input voltage

4

ADJ

Input voltage

5

Vo

Output Voltage

5

Vo

Output Voltage

Fin

GND

Grand

Fin

GND

Grand

●

Top View (Package dimension)



I/O equivalence circuit (All resistance values are typical.)

Fig.13 (FP)

(Unit : mm)

TO252-5

1 2 3

5

4

0.5

1.27

FIN

6.5

±0.2

2.3

±0.2

0.5

±0.1

1.0

±0.2

0.5

±0.1

C0.5

5.1

+0.2

-0.1

Fig.14 (HFP)

START UP

OCP

TSD

Fin

Vcc

SW

GND

ADJ

Vo

START UP

OCP

TSD

Fin

Vcc

SW

N.C.

ADJ

Vo

SW

210kΩ

200kΩ

1kΩ

2PIN[SW]

Vo

1kΩ

30pF

5PIN[Vo]

1kΩ

1.4PIN[Vcc、ADJ]

1kΩ

Vcc

ADJ

(Unit : mm)

HRP5

S

0.08 S

(MAX 9.745 include BURR)

5

4

3

2

1

1.905

±0.1

−0.05

+0.1

0.27

4.5

°

(6.5)

8.82

± 0.1

9.395

±0.125

0.73

±0.1

1.72

1.2575

−4.5°

+5.5°