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參數(shù)資料
| 型號： | LM2622MM-ADJ |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 600kHz/1.3MHz Step-up PWM DC/DC Converter |
| 中文描述： | 2.3 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | PLASTIC, MSOP-8 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 429K |
| 代理商： | LM2622MM-ADJ |
Operation
(Continued)
The phase margin can also be improved by adding C
C2
as
discussed earlier in the section. The equation for A
is
given below with additional equations required for the calcu-
lation:
mc
)
0.072fs (in V/s)
where R
is the minimum load resistance, V
is the maxi-
mum input voltage, g
m
is the error amplifier transconduc-
tance found in the Electrical Characteristics table, and R
D-
SON
is the value chosen from the graph ’R
DSON
vs. V
IN
’ in
the Typical Performance Characteristics section.
Layout Considerations
The input bypass capacitor C
, as shown in the typical
operating circuit, must be placed close to the IC. This will
reduce copper trace resistance which effects input voltage
ripple of the IC. For additional input voltage filtering, a 100nF
bypass capacitor can be placed in parallel with C
, close to
the V
pin, to shunt any high frequency noise to ground. The
output capacitor, C
, should also be placed close to the
IC. Any copper trace connections for the C
capacitor can
increase the series resistance, which directly effects output
voltage ripple. The feedback network, resistors R
and
R
, should be kept close to the FB pin, and away from the
inductor, to minimize copper trace connections that can in-
ject noise into the system. Trace connections made to the
inductor and schottky diode should be minimized to reduce
power dissipation and increase overall efficiency. For more
detail on switching power supply layout considerations see
Application Note AN-1149: Layout Guidelines for Switching
Power Supplies
L
www.national.com
11
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2622MM-ADJ/NOPB | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| LM2622MMX-ADJ | 制造商:Texas Instruments 功能描述:Conv DC-DC Single Step Up 2V to 12V 8-Pin MSOP T/R |
| LM2622MMX-ADJ/NOPB | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| LM2623 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LM2623_04 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:General Purpose, Gated Oscillator Based, DC/DC Boost Converter |
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