lm2598sx-12 National Semiconductor Corporation, lm2598sx-12 Datasheet - Page 9

• Manufacturer Part Number: lm2598sx-12
• Description: Simple Switcher Power Converter 150 Khz 1a Step-down Voltage Regulator, With Features
• Manufacturer: National Semiconductor Corporation

Test Circuit and Layout Guidelines
Component Values shown are for V
120 µF, 50V, Aluminum Electrolytic Nichicon “PL Series”
120 µF, 35V Aluminum Electrolytic, Nichicon “PL Series”
3A, 40V Schottky Rectifier, 1N5822
68 µH, L30
Typical Values
*C
C
R
where V
Select R
Component Values shown are for V
V
C
C
D1
L1
R
R
C
R
Typical Values
C
C
R
OUT
DELAY
Pull Up
IN
OUT
1
2
FF
FF
SS
DELAY
PULL UP
SS
— 0.1 µF
:
— 100 µH, L29
— 1 k , 1%
— 7.15k, 1%
— 3A, 40V Schottky Rectifier, 1N5822
— 120 µF, 35V, Aluminum Electrolytic Nichicon “PL Series”
= 10V, I
— 3.3 nF, See Application Information Section
— 3 k , See Application Information Section
:
:
— 0.1 µF
— 120 µF, 35V Aluminum Electrolytic, Nichicon “PL Series”
REF
1
— 4.7k
— 0.1 µF
to be approximately 1k , use a 1% resistor for best stability.
— 0.1 µF
— 4.7k
= 1.23V
LOAD
= 1A.
IN
IN
= 15V, V
= 20V,
FIGURE 1. Standard Test Circuits and Layout Guides
OUT
= 5V, I
Adjustable Output Voltage Versions
LOAD
Fixed Output Voltage Versions
= 1A.
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DS012593-24
DS012593-23
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