參數(shù)資料
型號(hào)： LM2594HVN-12
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator
中文描述： 1.4 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, PDIP8
封裝： 0.300 INCH, PLASTIC, DIP-8
文件頁數(shù)： 8/28頁
文件大?。?/td> 740K
代理商： LM2594HVN-12
Typical Circuit and Layout Guidelines
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, the wires indicated by
heavy lines should be wide printed circuit traces and
should be kept as short as possible.
For best results, ex-
ternal 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 as-
sociated wiring. Physically locate both resistors near the IC,
and route the wiring away from the inductor, especially an
open core type of inductor. (See application section for more
information.)
Fixed Output Voltage Versions
DS012439-22
C
IN
— 68 μF, 35V, Aluminum Electrolytic Nichicon “PL Series”
C
— 120 μF, 25V Aluminum Electrolytic, Nichicon “PL Series”
D1 — 1A, 40V Schottky Rectifier, 1N5819
L1 — 100 μH, L20
Select components with higher voltage ratings for designs using the LM2594HV with an input voltage between 40V and 60V.
Adjustable Output Voltage Versions
DS012439-23
C
IN
— 68 μF, 35V, Aluminum Electrolytic Nichicon “PL Series”
C
— 120 μF, 25V Aluminum Electrolytic, Nichicon “PL Series”
D1 — 1A, 40V Schottky Rectifier, 1N5819
L1 — 100 μH, L20
R
1
— 1 k
, 1%
C
FF
— See Application Information Section
FIGURE 1. Typical Circuits and Layout Guides
L
www.national.com
8
相關(guān)PDF資料
PDF描述
LM2594HVN-3.3 SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator
LM2594HVN-5.0 INDUCTOR, 470UH, 650MA; Inductor type:Power Inductor; Inductance:470uH; Tolerance, inductance:+/-20%; Resistance:1.48R; Current, DC max:650mA; Frequency, resonant:2.2MHz; Case style:SMD; Material, core:Ferrite; Tolerance, +:20%; RoHS Compliant: Yes
LM2594HVN-ADJ INDUCTOR, 1000UH, 560MA; Inductor type:Power Inductor; Inductance:1000uH; Tolerance, inductance:+/-20%; Resistance:1.8R; Current, DC max:560mA; Frequency, resonant:20MHz; Case style:SMD; Material, core:Ferrite; Tolerance, +:20%; RoHS Compliant: Yes
LM2594HVM-12 SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator
LM2594HVM-3.3 SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2594HVN-12/NOPB 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 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(fēng)格:SMD/SMT
LM2594HVN-3.3 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 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(fēng)格:SMD/SMT
LM2594HVN-3.3/NOPB 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 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(fēng)格:SMD/SMT
LM2594HVN-5.0 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 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(fēng)格:SMD/SMT
LM2594HVN-5.0/NOPB 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 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(fēng)格:SMD/SMT
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