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LM2621MM 参数 Datasheet PDF下载

LM2621MM图片预览
型号: LM2621MM
PDF下载: 下载PDF文件 查看货源
内容描述: 低输入电压,升压型DC- DC转换器 [Low Input Voltage, Step-Up DC-DC Converter]
分类和应用: 转换器
文件页数/大小: 11 页 / 655 K
品牌: NSC [ NATIONAL SEMICONDUCTOR ]
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LM2621
Pin Description
Pin
1
2
3
4
5
6
7
8
EN
FREQ
FB
SGND
V
DD
BOOT
SW
Name
PGND
Power Ground
Active-Low Shutdown Input
Frequency Adjust. An external resistor connected between this pin and Pin 6 (V
DD
) sets the switching
frequency of the LM2621.
Output Voltage Feedback
Signal Ground
Power Supply for Internal Circuitry
Bootstrap Supply for the Gate Drive of Internal MOSFET Power Switch
Drain of the Internal MOSFET Power Switch
Function
Typical Performance Characteristics
Efficiency vs Load Current
V
OUT
= 5.0V
Efficiency vs Load Current
V
OUT
= 3.3V
10093401
10093402
V
FB
vs Temperature
I
OP
vs Temperature
10093403
10093404
www.national.com
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