Technical Note

8/12

BD2270HFV

www.rohm.com

2011.05 - Rev.B

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

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Application Circuit

1.

Configuration of 3.3V load switch

Fig.35 Configuration of 3.3V Load Switch

2.

Configuration of 5V load switch

Fig.36 Configuration of 5V Load Switch

A 5V load switch can be configured like the 3.3V load switch. However, if the external N-channel MOSFET is low VGSS,

clamp it with Zener diode and the like.

3.

Configuration of low-voltage load switch

Fig.37 Configuration of Low-voltage Load Switch

Providing BD2270HFV drive power supply enables configuration of a low-voltage load switch.

VCC

DISC

GND

GATE

AEN

BD2270HFV

3.3V

3.3V

Load

ON/OFF

VCC

DISC

GND

GATE

AEN

BD2270HFV

5V

5V

Load

ON/OFF

VCC

DISC

GND

GATE

AEN

BD2270HFV

1.2V

1.2V

Load

ON/OFF

3.3V