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LM2597 датащи(PDF) 19 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
номер детали LM2597
подробное описание детали  SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator, with Features
PDF  34 Pages
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производитель  NSC [National Semiconductor (TI)]
домашняя страница  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2597 датащи(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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