LM2596 Reference Design - Buck Controller: 9-26V Input; 3.3V @ 0.7A Output
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Design Specifications
Inputs
Outputs #1
VinMin=9.0 V
Vout1=3.3 V
VinMax=26.0 V
Iout1=0.7 A
Design Resources
Additional Resources
Bill Of Materials
Part
Manufacturer
Part#
Attributes
C1
Vishay
595D127X0004C2T
120u F, 0.1 Ohms
C2
TDK
C3216X5R0J106
10u F, 0.020 Ohms
C3
Vishay
595D156X0035C2T
15u F, 0.18 Ohms
C4
Vishay
VJ0805A101KXXAT
100p F
C5
Vishay
VJ0805Y822KXXCW1BC
8.2n F
C6
TDK
CC3225X7R1H335
3.3u F
D1
IR
30BQ040
0.525 V
L1
Coilcraft
DO5022P-683
68u H, 0.054 Ohms
L2
Coilcraft
DO1608C-472HC
4.7u H, 0.054 Ohms
R1
Vishay
CRCW08051000FRT6
100 Ohms
R2
Vishay
CRCW08053091FRT6
3.09k Ohms
R3
Vishay
CRCW08051001FRT6
1k Ohms
U1
National Semiconductor
LM2596
Design Description
The design uses buck topology to generate 3.3V output using LM2596 buck controller operating at 150kHz. This is a simple switcher which requires a minimum number of external components and includes internal frequency compensation.
Schematic
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Example Schematic Showing Connection for all Components.
Layout
Example Schematic Showing Connection for all Components.
