BRCD3408

Rev.D Oct.-2015

DATA SHEET

http://www.fsbrec.com

2 / 11

引脚

PIN

名称

NAME



功能

FUNCTION



1

EN/RUN

使能端，驱动电压高于1.5V时打开，低于0.3V是关断，不能悬空。

Chip Enable Pin. Drive RUN above 1.5V to turn on the part. Drive RUN

below 0.3V to turn it off. Do not leave RUN floating

2

GND



接地端

Ground Pin



3

LX/SW

电源开关输出端。该引脚与器件内部P型和N型MOSFET的漏极连接，外部

需要与电感连接。

Power Switch Output. It is the switch node connection to Inductor. This pin

connects to the drains of the internal P-ch and N-ch MOSFET switches

4

VIN

电源输入端。靠近引脚处必须连接去耦电容，该电容可以是4.7µF或更大的

陶瓷电容。

Power Supply Input. Must be closely decoupled to GND with a 4.7µF or

greater ceramic capacitor

5

FB

输出电压反馈输入端。通过一个内部电阻分压器将输出电压与内部参考电

压进行比较。

Output Voltage Feedback Pin. An internal resistive divider divides the

output voltage down for comparison to the internal reference voltage



印章代码 / Marking

见印章说明。 See Marking Instructions.

引脚排列 / Pinning

1

3

2

4

5