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參數(shù)資料
| 型號： | ST619LBDR |
| 英文描述： | CPLD Logic IC; Logic Type:Programmable; No. of Macrocells:96; Package/Case:84-PLCC; Mounting Type:Surface Mount |
| 中文描述： | 模擬IC |
| 文件頁數(shù)： | 6/6頁 |
| 文件大?。?/td> | 67K |
| 代理商： | ST619LBDR |
ST619LB SERIES
6/9
APPLICATION INFORMATION
Charge pump capacitors C1 and C2
Thevalues of charge pump capacitors C1 and C2
are critical to ensure adequate output current and
avoid excessive peak currents. It is suggested to
use values in the range of 0.22
μ
F to 1.0
μ
F and
avoid theuse of higher values of C
O
capacitors, in
order to obtain best performance. Ceramic or
tantalum capacitors are recommended.
Input and output capacitors C3 and C4
The type of input capacitor (C3) and output filter
capacitor (C4) used is not critical, but it does affect
performance. Tantalums, ceramics or aluminium
electrolytic are suggested. For lowest ripple, use
large, low effective series resistance (ESR)
ceramic tantalum capacitors. If the input supply
source impedance is very low, C3 can be omitted.
The
typical
application
component values for proper operation using
minimal board space. The input bypass capacitor
(C3) and output filter capacitor (C4) should be at
least 10
μ
F. Many capacitors exhibit 40% to 50%
variation
over
temperature.
capacitor temperature coefficient by selecting a
large nominal value to ensure proper operation
over temperature.
circuit
shows
the
Compensate
for
Layout Consideration
In the below figure, the typical
demoboard of ST619LB isreported. Agood layout
ensures stability and helps maintain the output
voltage under heavy loads. For best performance,
use very short connections to the capacitors.
application
TYPICAL APPLICATION CIRCUIT
TYPICAL APPLICATION DEMOBOARD
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ST619LBN | CPLD Logic IC; Logic Type:Programmable; No. of Macrocells:64; Package/Case:84-PLCC; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No; Mounting Type:Surface Mount RoHS Compliant: No |
| ST619 | DC-DC CONVERTER REGULATED 5V CHARGE PUMP |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| ST619LBN | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Step-up 5 Volt 30mA RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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