參數(shù)資料
型號： TC1240
廠商： Microchip Technology Inc.
英文描述： Positive Doubling Charge Pumps with Shutdown in a SOT-23 Package(159kHz開關頻率,帶關斷DC-DC)
中文描述： 積極加倍電荷泵與關機采用SOT - 23封裝（159kHz開關頻率，帶關斷的DC - DC）
文件頁數(shù)： 9/16頁
文件大?。?/td> 355K
代理商： TC1240
2003 Microchip Technology Inc.
DS21516C-page 9
TC1240/TC1240A
5.4
Input Supply Bypassing
The V
IN
input should be capacitively bypassed to
reduce AC impedance and minimize noise effects due
to the switching internal to the device. The
recommended capacitor should be a large value (at
least equal to C
1
) connected from the input to GND.
5.5
Shutdown Input
The TC1240 and TC1240A are disabled when SHDN is
high, and enabled when SHDN is low. This input cannot
be allowed to float.
FIGURE 5-3:
Test Circuit.
5.6
Voltage Doubler
The most common application for charge pump
devices is the doubler (Figure 5-3). This application
uses two external capacitors – C
1
and C
2
(plus a power
supply bypass capacitor, if necessary). The output is
equal to 2 x V
IN
minus any voltage drops due to
loading. Refer to Table 5-1 and Table 5-2 for capacitor
selection.
3
4
1
2
5
C
3
C
1
C
2
V
IN
V
OUT
R
L
TC1240
TC1240A
V
IN
C-
SHDN
OUT
C+
GND
6
+
+
+
Device
C
1
C
2
C
3
TC1240
TC1240A
3.3 μF
3.3 μF
3.3 μF
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相關代理商/技術參數(shù)
參數(shù)描述
TC1240_13 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Positive Doubling Charge Pumps with Shutdown in a SOT-23 Package
TC1240A 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Positive Doubling Charge Pumps with Shutdown in a SOT-23 Package
TC1240AECH 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Positive Doubling Charge Pumps with Shutdown in a SOT-23 Package
TC1240AECHTR 功能描述:電荷泵 Positive Doubling RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube
TC1240AI/CHTR 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Positive Doubling Charge Pumps with Shutdown in a SOT-23 Package
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