參數(shù)資料
型號(hào)： LM3311SQ-HIOP
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： 2.6 A SWITCHING REGULATOR, 1280 kHz SWITCHING FREQ-MAX, QCC24
封裝： LLP-24
文件頁(yè)數(shù)： 17/32頁(yè)
文件大?。?/td> 2504K
代理商： LM3311SQ-HIOP
LAYOUT CONSIDERATIONS
The input bypass capacitor C
IN, as shown in the typical op-
erating 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
IN, close to the VIN
pin, to shunt any high frequency noise to ground. The output
capacitor, C
OUT, should also be placed close to the IC. Any
copper trace connections for the C
OUT capacitor can increase
the series resistance, which directly effects output voltage
ripple. The feedback network, resistors R
FB1 and RFB2, should
be kept close to the FB pin, and away from the inductor, to
minimize copper trace connections that can inject noise into
the system. R
E and CE should also be close to the RE and CE
pins to minimize noise in the GPM circuitry. Trace connec-
tions 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 Guide-
lines for Switching Power Supplies.
The input capacitor, output capacitor, and feedback resistors
for the LDO should be placed as close to the device as pos-
sible to minimize noise and increase stability. Keep the feed-
back traces short and connect R
ADJ2 directly to AGND close
to the device.
For Op-Amp layout please refer to the Operational Amplifier
section.
Figure 6, Figure 7, and Figure 8 in the Application Information
section following show the schematic and an example of a
good layout as used in the LM3310/11 evaluation board.
www.national.com
24
LM3311
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM3311SQ-HIOP/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(fēng)格: 封裝 / 箱體:CPAK
LM3311SQX 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(fēng)格: 封裝 / 箱體:CPAK
LM3311SQX/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(fēng)格: 封裝 / 箱體:CPAK
LM3311SQX-HIOP 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(fēng)格: 封裝 / 箱體:CPAK
LM3311SQX-HIOP/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(fēng)格: 封裝 / 箱體:CPAK
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