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參數(shù)資料
| 型號(hào)： | AIC1653CVBG |
| 廠商： | Analog Integrations Corporation |
| 英文描述： | Micropower Inverting DC/DC Converter in SOT-23-5 |
| 中文描述： | 微反向直流/直流轉(zhuǎn)換器采用SOT - 23 - 5 |
| 文件頁(yè)數(shù)： | 8/11頁(yè) |
| 文件大?。?/td> | 225K |
| 代理商： | AIC1653CVBG |
AIC1653
8
Multilayer ceramic capacitors are the best choice
as they have a very low ESR and are available in
low-profile packages. Due to the advantage of
small size, it makes multilayer ceramic capacitors
and
AIC1653’s
SOT-23
packages
good
companions for size-concerning applications.
Inductor Selection – Inverting Charge Pump
Regulator
This topology, inverting charge pump regulator, is
recommended when internal power switch voltage
is over its maximum rating.
As the inverting regulator application above, its
internal power switch voltage is 9.6V (the sum of
the absolute value of 3.6V input and –6V output),
which is fine as it is under the maximum rating, 30V.
However, any applications of internal power switch
voltage exceeding the maximum rating, topology of
inverting charge pump regulator is recommended
for their system.
Solid tantalum capacitors are another alternative
for output capacitors, but they take more board
area and have larger ESR than ceramics.
Input Capacitors
Ceramic capacitors also make a good choice for
the input decoupling capacitor, which should be
placed as close as possible to AIC1653. A 4.7μF
input capacitor is sufficient for most applications.
For example, a 12V to -30V converter will generate
42V internal power switch voltage, which exceeds
its maximum rating 30V. For such a system, an
inverting
charge
pump
regulator
is
the
recommended topology.
Be aware that, sufficient voltage rating is required
for capacitor selection.
Diode Selection
Appropriate inductor value for an inverting charge
pump regulator can be calculated by formula (2).
For designs with varying V
IN
value such as
battery-powered applications, minimum V
IN
value
is used in formula (2).
V
L
=
For most AIC1653 applications, Rohm RB521S-30
surface mount Schottky diode (200mA, 30V)
providing the advantage of low forward voltage and
fast switching speed is an ideal choice. Note that,
generally, rating of handling minimum current at 1A
is required for AIC1653 applications.
OFF
LIM
IN(MIN)
V
OUT
t
I
D
V
+
(2)
Reducing Output Ripple Voltage
Capacitor Selection
Using low ESR capacitors will help reduce the
output ripple voltage. In addition, proper selection
of the inductor and the output capacitor plays an
important role in output ripple voltage reduction.
Output Capacitors
Low
ESR
(Equivalent
Series
Resistance)
capacitors should be used at output terminal to
minimize the output ripple voltage.
The AIC1653 provides energy to the output in
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AIC1653CVTR | 制造商:AIC 制造商全稱(chēng):Analog Intergrations Corporation 功能描述:Micropower Inverting DC/DC Converter in SOT-23-5 |
| AIC1660 | 制造商:AIC 制造商全稱(chēng):Analog Intergrations Corporation 功能描述:Switched-Capacitor Voltage Converter |
| AIC1660CN | 制造商:AIC 制造商全稱(chēng):Analog Intergrations Corporation 功能描述:Switched-Capacitor Voltage Converter |
| AIC1660CS | 制造商:AIC 制造商全稱(chēng):Analog Intergrations Corporation 功能描述:Switched-Capacitor Voltage Converter |
| AIC1680 | 制造商:AIC 制造商全稱(chēng):Analog Intergrations Corporation 功能描述:Ultra Low Power Voltage Detector |
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