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參數(shù)資料
| 型號： | LM2590HVT-5.0 |
| 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, with Features |
| 中文描述： | 3 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, PZFM7 |
| 封裝： | TO-220, 7 PIN |
| 文件頁數(shù)： | 8/20頁 |
| 文件大小： | 752K |
| 代理商： | LM2590HVT-5.0 |
Test Circuit and Layout Guidelines
Fixed Output Voltage Versions
10134724
Component Values shown are for V
IN
= 15V,
V
OUT
= 5V, I
LOAD
= 1A.
C
IN
—
470 μF, 50V, Aluminum Electrolytic Nichicon “PM Series”
C
OUT
—
220 μF, 25V Aluminum Electrolytic, Nichicon “PM Series”
D1
—
2A, 60V Schottky Rectifier, 21DQ06 (International Rectifier)
L1
—
68 μH, See Inductor Selection Procedure
Adjustable Output Voltage Versions
10134725
Select R
1
to be approximately 1 k
, use a 1% resistor for best stability.
Component Values shown are for V
IN
= 20V,
V
OUT
= 10V, I
LOAD
= 1A.
C
IN
:
— 470 μF, 35V, Aluminum Electrolytic Nichicon “PM Series”
C
OUT
:
— 220 μF, 35V Aluminum Electrolytic, Nichicon “PM Series”
D1 —2A, 60V Schottky Rectifier, 21DQ06 (International Rectifier)
L1 — 100 μH, See Inductor Selection Procedure
R
1
— 1 k
, 1%
R
2
— 7.15k, 1%
C
FF
— 3.3 nF
Typical Values
C
SS
—0.1 μF
C
DELAY
—0.1 μF
R
PULL UP
— 4.7k (use 22k if V
OUT
is
≥
45V)
Resistive divider is required to aviod exceeding maximum rating of 45V/3mA on/into flag pin.
Small signal Schottky diode to prevent damage to feedback pin by negative spike when output is shorted (C
FF
not being able to discharge immediately will
drag feedback pin below ground). Required if V
IN
>
40V
FIGURE 1. Standard Test Circuits and Layout Guides
L
www.national.com
8
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2590HVT-ADJ | 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 安裝風格:SMD/SMT |
| LM2590HVT-ADJ | 制造商:Texas Instruments 功能描述:SWITCHING REG 1A ADJ 2590 TO2207 |
| LM2590HVT-ADJ/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 安裝風格:SMD/SMT |
| LM2591HVS-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 安裝風格:SMD/SMT |
| LM2591HVS-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 安裝風格:SMD/SMT |
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