LM2596DSADJR4G ON Semiconductor, LM2596DSADJR4G Datasheet - Page 22

• Manufacturer Part Number: LM2596DSADJR4G
• Description: IC REG SW STP-DWN 3A D2PAK-5
• Manufacturer: ON Semiconductor
• Type: Step-Down (Buck)r

Specifications of LM2596DSADJR4G

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.23 ~ 37 V
• Current - Output: 3A
• Frequency - Switching: 150kHz
• Voltage - Input: 4.5 ~ 40 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: D²Pak, TO-263 (5 leads + tab)
• Output Voltage: 1.23 V to 37 V
• Output Current: 3 A
• Input Voltage: - 5 V to - 12 V
• Switching Frequency: 150 KHz
• Operating Temperature Range: - 40 C to + 125 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 95 %
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

References
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THE LM2596 STEP−DOWN VOLTAGE REGULATOR WITH 5.0 V @ 3.0 A OUTPUT POWER CAPABILITY.
National Semiconductor LM2596 Data Sheet and Application Note
National Semiconductor LM2595 Data Sheet and Application Note
Marty Brown “Practical Switching Power Supply Design”, Academic Press, Inc., San Diego 1990
Ray Ridley “High Frequency Magnetics Design”, Ridley Engineering, Inc. 1995
+V
Figure 32. Printed Circuit Board Layout
Figure 31. Schematic Diagram of the 5.0 V @ 3.0 A Step−Down Converter Using the LM2596−ADJ
in
Unregulated
DC Input
= 10 V to 40 V
100 mF
/50 V
C1
C2
D1
L1
R1
R2
C1
TYPICAL APPLICATION WITH THROUGH−HOLE PC BOARD LAYOUT
−
−
−
−
−
−
Component Side
NOTE: Not to scale.
100 mF, 50 V, Aluminium Electrolytic
220 mF, 25 V, Aluminium Electrolytic
3.0 A, 40 V, Schottky Rectifier, 1N5822
33 mH, DO5040H, Coilcraft
1.0 kW, 0.25 W
3.0 kW, 0.25 W
+V
in
1
3
LM2596−ADJ
GN
D
4
Feedback
ON/OFF
5
ON/OFF
2
Output
http://onsemi.com
D1
1N5822
22
33 mH
L1
Figure 33. Printed Circuit Board Layout
C2
220 mF
/16 V
NOTE: Not to scale.
R1
1.0 k
Copper Side
R2
3.0 k
V
V
R1 is between 1.0 k and 5.0 k
ref
out
= 1.23 V
+ V
C
ref
FF
) 1.0 ) R2
V
Regulated
Output Filtered
out2
= 5.0 V @ 3.0 A
R1