LM2575T-3.3G ON Semiconductor, LM2575T-3.3G Datasheet - Page 22

• Manufacturer Part Number: LM2575T-3.3G
• Description: IC REG SW 1A 3.3V STPDWN TO220-5
• Manufacturer: ON Semiconductor
• Type: Step-Down (Buck)r

Specifications of LM2575T-3.3G

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 3.3V
• Current - Output: 1A
• Frequency - Switching: 52kHz
• Voltage - Input: 4.75 ~ 40 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: TO-220-5 (Straight Leads)
• Output Voltage: 3.3 V
• Output Current: 1 A
• Input Voltage: 4.75 V to 40 V
• Switching Frequency: 52 KHz
• Operating Temperature Range: - 40 C to + 125 C
• Mounting Style: Through Hole
• Duty Cycle (max): 98 %
• Primary Input Voltage: 12V
• No. Of Outputs: 1
• No. Of Pins: 5
• Filter Terminals: Through Hole
• Frequency: 52kHz
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

1N5242B
Unregulated
DC Input
+
+V
NOTE: This picture does not show the complete circuit.
15 k
15 k
Figure 32. Undervoltage Lockout Circuit for
R2
Z1
R1
in
100 mF
/50 V
C
in
68 k
R3
Buck−Boost Converter
Q1
2N3904
+V
in
1
3
C
100 mF
LM2575−Adj
+V
in
GND
in
1
Figure 33. Adjustable Power Supply with Low Ripple Voltage
5
80
70
60
50
40
30
LM2575−5.0
Figure 34. D
5
0
ON/OFF
Power Dissipation versus P.C.B. Copper Length
ON/OFF
2
4
Vertically
Output
Mounted
Feedback
Free Air
3
5.0
GND
V
2
V
out
PAK Thermal Resistance and Maximum
th
L, LENGTH OF COPPER (mm)
= -5.0 V
≈ 13 V
http://onsemi.com
D1
1N5819
10
150 mH
Minimum
Size Pad
L1
P
R
22
15
D(max)
qJA
Adjustable Output, Low−Ripple Power Supply
features an adjustable output voltage is shown in Figure 33.
The input voltage ranges from roughly 8.0 V to 40 V. In order
to achieve a 10 or more times reduction of output ripple, an
additional L−C filter is included in this circuit.
for T
A 1.0 A output current capability power supply that
This regulator delivers 1.0 A into 1.2 V to 35 V output.
C
2200 mF
out
A
20
= 50°C
L
2.0 oz. Copper
Î Î Î Î
Î Î Î Î
Î Î Î Î
Î Î Î Î
25
L
R2
50 k
R1
1.1 k
30
3.5
3.0
2.5
2.0
1.5
1.0
Optional Output
Ripple Filter
20 mH
100 mF
L2
C1
1.2 V to 35 V @1.0 A
Regulated
Output Voltage