Technical Note

7/12

BD2226G, BD2227G

www.rohm.com

2011.05 - Rev.B

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

●

Block Diagram

VIN

GND

EN(/EN)

1

2

3

4

5

/OC

VOUT

Top View

Fig.37 Block diagram

Fig.38 Pin configuration

●

Pin Description

Pin No.

Symbol

I/O

Function

1

VIN

-

Switch input and the supply voltage for the IC.

2

GND

-

Ground.

3

EN, /EN

I

Enable input.

EN: High level input turns on the switch. (BD2226G)

/EN: Low level input turns on the switch. (BD2227G)

4

/OC

O

Over-current notification terminal.

Low level output during over-current or over-temperature condition.

Open-drain fault flag output.

5

VOUT

O

Switch output.

●

I/O Circuit

Symbol

Pin No.

Equivalent Circuit

EN

(/EN)

3

EN

(/EN)

VOUT

5

VOUT

/OC

4

/OC

Under-Voltage

Lockout

Charge

Pump

EN(/EN)

Delay

Counter

Over-Current

Detection

Thermal

Shutdown

VIN

/OC

GND

VOUT