LM2576D2TR4-012G ON Semiconductor, LM2576D2TR4-012G Datasheet - Page 23

• Manufacturer Part Number: LM2576D2TR4-012G
• Description: IC REG SW 3A 12V STEPDOWN D2PAK
• Manufacturer: ON Semiconductor
• Type: Step-Down (Buck)r

Specifications of LM2576D2TR4-012G

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 12V
• Current - Output: 3A
• Frequency - Switching: 52kHz
• Voltage - Input: 7 ~ 40 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: D²Pak, TO-263 (5 leads + tab)
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

References
•
•
•
•
National Semiconductor LM2576 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
GND
+V
THE LM2576−ADJ STEP−DOWN VOLTAGE REGULATOR WITH 8.0 V @ 1.0 A OUTPUT POWER
in
+V
in
Figure 39. Printed Circuit Board Layout
Figure 38. Schematic Diagram of the 8.0 V @ 3.0 A Step−Down Converter Using the LM2576−ADJ
in
Unregulated
DC Input
+
= 10 V to 40 V
CAPABILITY. TYPICAL APPLICATION WITH THROUGH−HOLE PC BOARD LAYOUT
C1
100 mF
/50 V
C1
C2
D1
L1
R1
R2
C1
−
−
−
−
−
−
D1
Component Side
NOTE: Not to scale.
LM2576
100 mF, 50 V, Aluminium Electrolytic
1000 mF, 16 V, Aluminium Electrolytic
3.0 A, 40 V, Schottky Rectifier, 1N5822
150 mH, RL2444, Renco Electronics
1.8 kW, 0.25 W
10 kW, 0.25 W
L1
U1
+V
in
1
3
LM2576−ADJ
GN
D
4
R1
R2
Feedback
C2
ON/OFF
5
+
ON/OFF
2
Output
ON/OFF
GND
V
http://onsemi.com
out
out
LM2576
D1
1N5822
23
150 mH
L1
Figure 40. Printed Circuit Board Layout
C2
1000 mF
/16 V
NOTE: Not to scale.
R1
1.8 k
Copper Side
R2
10 k
V
V
R1 is between 1.0 k and 5.0 k
ref
out
= 1.23 V
+ V
ref
) 1.0 ) R2
V
Regulated
Output Filtered
out2
= 8.0 V @ 3.0 A
R1