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參數(shù)資料
| 型號： | LM3661TL-1.25 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.454 A SWITCHING REGULATOR, 675 kHz SWITCHING FREQ-MAX, PBGA10 |
| 封裝： | MICRO SMD-10 |
| 文件頁數(shù)： | 7/17頁 |
| 文件大?。?/td> | 845K |
| 代理商： | LM3661TL-1.25 |
Application Information (Continued)
to perform these functions. The ESR, or equivalent series
resistance, of the filter capacitors is a major factor in voltage
ripple. Table 3 lists suggested capacitors suppliers.
Table 3. Suggested capacitors and Suppliers
Model
Size (EIA)
Vendor
Input Filter Capacitor (10F, 6.3V, X5R or X7R9
C2012X5R0J106M
2012 (0805)
TDK
JMK212BJ106MG
2012 (0805)
Taiyo-Yuden
GRM21BR60J106K
2012 (0805)
muRata
Output Filter Capacitor (22F, 6.3V, X5R or X7R9
C3225X5R0J226M
3225(1210)
TDK
JMK325BJ226MG
3225(1210)
Taiyo-Yuden
GRM32DR60J226K
3225(1210)
muRata
BOARD LAYOUT CONSIDERATION
PC board layout is an important part of DC-DC converter
design. Poor board layout can disrupt the performance of a
DC-DC converter and surrounding circuitry by contributing
EMI, ground bounce, and resistive voltage loss in the traces.
Below are layout recommendation to maximize device per-
formance: 1) Place the inductor and filter capacitors close
together and minimize the traces between components as
they carry relatively high switching current and act as anten-
nas. 2) Use wide traces between the power components and
for power connections to DC-DC converters circuit. 3) Route
noise sensitive traces such as the voltage feedback path
away from noisy power components. 4) Connect the ground
pins and filter capacitors together via a ground plane to
prevent switching current circulating through the ground
plane. Additional information regarding Micro SMD package
layout can be found in Application note AN-1112.
LM3661
www.national.com
15
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM3661TLX-1.25 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:450mA Subminiature, Micropower Step-Down DC-DC Converter for Ultra Low-Voltage Circuits |
| LM3661TLX-1.35 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:450mA Subminiature, Micropower Step-Down DC-DC Converter for Ultra Low-Voltage Circuits |
| LM3661TLX-1.35/NOPB | 制造商:Texas Instruments 功能描述: |
| LM3661TLX-1.40 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:450mA Subminiature, Micropower Step-Down DC-DC Converter for Ultra Low-Voltage Circuits |
| LM3668 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1A, High Efficiency Dual Mode Single Inductor Buck-Boost DC/DC Converter |
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