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LM2597 bảng dữ liệu(PDF) 19 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
tên linh kiện LM2597
Giải thích chi tiết về linh kiện  SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator, with Features
PDF  34 Pages
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nhà sản xuất  NSC [National Semiconductor (TI)]
Trang chủ  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2597 bảng dữ liệu(HTML) 19 Page - National Semiconductor (TI)

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Typical Circuit and Layout Guidelines
Fixed Output Voltage Versions
DS012440-27
Component Values shown are for VIN = 15V, VOUT =5V, ILOAD = 500 mA.
CIN
— 47 µF, 50V, Aluminum Electrolytic Nichicon “PL Series”
COUT — 120 µF, 25V Aluminum Electrolytic, Nichicon “PL Series”
D1
— 1A, 30V Schottky Rectifier, 1N5818
L1
— 100 µH, L20
Typical Values
CSS
— 0.1 µF
CDELAY — 0.1 µF
RPull Up — 4.7k
*Use Bias Supply pin for 5V and 12V Versions
Adjustable Output Voltage Versions
DS012440-56
Select R1 to be approximately 1 kΩ, use a 1% resistor for best stability.
Component Values shown are for VIN = 20V,
VOUT = 10V, ILOAD = 500 mA.
CIN
— 68 µF, 35V, Aluminum Electrolytic Nichicon “PL Series”
COUT — 120 µF, 25V Aluminum Electrolytic, Nichicon “PL Series”
D1
— 1A, 30V Schottky Rectifier, 1N5818
L1
— 150 µH, L19
R1
—1 k
Ω,1%
R2
— 7.15k, 1%
CFF — 3.3 nF, See Application Information Section
Typical Values
CSS — 0.1 µF
CDELAY — 0.1 µF
RPULL UP — 4.7k
*For output voltages between 4V and 20V
FIGURE 12. Typical Circuits and Layout Guides
www.national.com
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