LM2595DSADJG ON Semiconductor, LM2595DSADJG Datasheet - Page 22

• Manufacturer Part Number: LM2595DSADJG
• Description: IC REG SW 1A STEPDOWN D2PAK-5
• Manufacturer: ON Semiconductor
• Type: Step-Down (Buck)r

Specifications of LM2595DSADJG

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.2 ~ 37 V
• Current - Output: 1A
• 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: 1 A
• Input Voltage: 4.75 V to 40 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 LM2595 STEP−DOWN VOLTAGE REGULATOR WITH 5.0 V @ 1.0 A OUTPUT POWER CAPABILITY.
National Semiconductor LM2595 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
Figure 33. Printed Circuit Board Layout With
+V
Figure 32. Schematic Diagram of the 5.0 V @ 1.0 A Step−Down Converter Using the LM2595−ADJ
in
Unregulated
DC Input
= 10 V to 40 V
100 mF
/50 V
C1
C2
D1
L1
R1
R2
C
ff
C1
TYPICAL APPLICATION WITH THROUGH−HOLE PC BOARD LAYOUT
NOTE: Not to scale.
−
−
−
−
−
−
−
100 mF, 50 V, Aluminium Electrolytic
470 mF, 25 V, Aluminium Electrolytic
1.0 A, 40 V, Schottky Rectifier, 1N5819
100 mH, DO3340P, Coilcraft
1.0 kW, 0.25 W
3.0 kW, 0.25 W
See Table 1
Component
+V
in
2
3
GND
LM2595
4
Feedback
ON/OFF
5
ON/OFF
1
Output
http://onsemi.com
D1
1N5819
22
68 mH
L1
Figure 34. Printed Circuit Board Layout
C2
470 mF
/25 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 @ 1.0 A
R1