參數(shù)資料
型號(hào)： LM2591HVS-3.3
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator
中文描述： 3 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, PSSO5
封裝： TO-263, 5 PIN
文件頁(yè)數(shù)： 18/20頁(yè)
文件大小： 730K
代理商： LM2591HVS-3.3
Application Information
(Continued)
LAYOUT SUGGESTIONS
As in any switching regulator, layout is very important. Rap-
idly switching currents associated with wiring inductance can
generate voltage transients which can cause problems. For
minimal inductance and ground loops, with reference to
Figure 1
, the wires indicated by
heavy lines should be wide
printed circuit traces and should be kept as short as
possible.
For best results, external components should be
located as close to the switcher lC as possible using ground
plane construction or single point grounding.
If
open core inductors are used,
special care must be
taken as to the location and positioning of this type of induc-
tor. Allowing the inductor flux to intersect sensitive feedback,
lC groundpath and C
OUT
wiring can cause problems.
When using the adjustable version, special care must be
taken as to the location of the feedback resistors and the
associated wiring. Physically locate both resistors near the
IC, and route the wiring away from the inductor, especially an
open core type of inductor.
10129342
FIGURE 12. Inverting Regulator Ground Referenced Shutdown
10129386
FIGURE 13. Inverting Regulator Ground Referenced Shutdown using Opto Device
L
www.national.com
18
相關(guān)PDF資料
PDF描述
LM2591HVS-ADJ SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator
LM2591HVT-ADJ SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator
LM2591HVT-3.3 SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator
LM2591HVS-5.0 SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator
LM2591HV SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2591HVS-5.0 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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(fēng)格:SMD/SMT
LM2591HVS-5.0/NOPB 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 PWR CONVERTER 150KHz 1A ST-DOWN VLTG REG RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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(fēng)格:SMD/SMT
LM2591HVS-5.0/NOPB 制造商:Texas Instruments 功能描述:DC/DC Converter (DC-DC) / Switching Regu
LM2591HVS-ADJ 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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(fēng)格:SMD/SMT
LM2591HVS-ADJ/NOPB 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 PWR CONVERTER 150KHz 1A ST-DOWN VLTG REG RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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(fēng)格:SMD/SMT
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