Datasheet

LM2598
www.ti.com SNVS125C –MARCH 1998–REVISED APRIL 2013
Test Circuit and Layout Guidelines
Fixed Output Voltage Versions
Component Values shown are for V
IN
= 15V, V
OUT
= 5V, I
LOAD
= 1A.
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
SS
: — 0.1 μF
C
DELAY
: — 0.1 μF
R
Pull Up
: — 4.7k
Adjustable Output Voltage Versions
where V
REF
= 1.23V
Select R
1
to be approximately 1kΩ, use a 1% resistor for best stability.
Component Values shown are for V
IN
= 20V,
V
OUT
= 10V, I
LOAD
= 1A.
C
IN
— 120 μF, 35V, Aluminum Electrolytic Nichicon “PL Series”
C
OUT
— 120 μF, 35V Aluminum Electrolytic, Nichicon “PL Series”
D1 —3A, 40V Schottky Rectifier, 1N5822
L1 —100 μH, L29
R
1
—1 kΩ, 1%
R
2
—7.15k, 1%
C
FF
—3.3 nF, See Application Information Section
R
FF
—3 kΩ, See Application Information Section
Typical Values
C
SS
—0.1 μF
C
DELAY
—0.1 μF
R
PULL UP
—4.7k
Copyright © 1998–2013, Texas Instruments Incorporated Submit Documentation Feedback 11
Product Folder Links: LM2598