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參數(shù)資料
| 型號： | LM2594M-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, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SO-8 |
| 文件頁數(shù)： | 8/28頁 |
| 文件大?。?/td> | 740K |
| 代理商： | LM2594M-12 |
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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 |
|---|---|
| LM2594M-3.3 | Octal Buffers/Drivers With 3-State Outputs 20-SOIC -40 to 85 |
| LM2594M-5.0 | SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator |
| LM2594M-ADJ | Octal Buffers/Drivers With 3-State Outputs 20-SOIC -40 to 85 |
| LM2594HVN-12 | SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator |
| LM2594HVN-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 |
|---|---|
| LM2594M-12/NOPB | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 150KHZ 0.5A STEP- DOWN VLTG REG 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 |
| LM2594M-12/NOPB | 制造商:Texas Instruments 功能描述:IC STEP-DOWN REGULATOR SOIC-8 制造商:Texas Instruments 功能描述:IC, STEP-DOWN REGULATOR, SOIC-8 |
| LM2594M3.3 | 制造商:National Semiconductor 功能描述:Conv DC-DC Single Inv/Step Down 4.5V to 40V 8-Pin SOIC Rail 制造商:National Semiconductor 功能描述:Conv DC-DC Single Inv/Step Down 4.5V to 40V 8-Pin SOIC N Rail |
| LM2594M-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 |
| LM2594M-3.3 | 制造商:Texas Instruments 功能描述:SWITCHING REG 0.5A 3.3V SMD 2594 |
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