LM2576T-3.3G ON Semiconductor, LM2576T-3.3G Datasheet - Page 21

IC REG SW 3A 3.3V STPDWN TO220-5

LM2576T-3.3G

Manufacturer Part Number
LM2576T-3.3G
Description
IC REG SW 3A 3.3V STPDWN TO220-5
Manufacturer
ON Semiconductor
Type
Step-Down (Buck)r
Datasheet

Specifications of LM2576T-3.3G

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
3.3V
Current - Output
3A
Frequency - Switching
52kHz
Voltage - Input
7 ~ 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
3 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
Other names
LM2576T-3.3GOS

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM2576T-3.3G
Manufacturer:
TO-220
Quantity:
20 000
current:
where t on +
The following formula is used to obtain the peak inductor
1N5242B
NOTE: This picture does not show the complete circuit.
Figure 32. Undervoltage Lockout Circuit for
40 V Max
Unregulated
DC Input
I
+V
10 k
10 k
peak
R2
Z1
R1
in
100 mF
C
in
[
V
47 k
in
R3
I
Load
|V
+V
) |V
Figure 34. 1.2 to 35 V Adjustable 3.0 A Power Supply with Low Output Ripple
Buck Converter
Q1
2N3904
in
1
O
|
(V
O
3
V
in
|
LM2574−Adj
in
x 1.0
C
100 mF
GN
D
) |V
+V
in
f osc
in
1
O
, and f osc + 52 kHz.
5
5
|)
LM2576−XX
V
)
ON/OFF
th
ON/OFF
≈ 13 V
V
in
2
4
Feedback
Output
2L 1
x t on
3
GN
D
http://onsemi.com
D1
1N5822
LM2576
150 mH
L1
21
conditions, the worst case occurs when V
Adjustable Output, Low−Ripple Power Supply
features an adjustable output voltage is shown in Figure 34.
The input voltage ranges from roughly 3.0 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.
Under normal continuous inductor current operating
A 3.0 A output current capability power supply that
This regulator delivers 3.0 A into 1.2 V to 35 V output.
1N5242B
C
2200 mF
NOTE: This picture does not show the complete circuit.
out
+V
Figure 33. Undervoltage Lockout Circuit for
15 k
15 k
R2
Z1
R1
in
47 k
R3
Buck−Boost Converter
R2
50 k
R1
1.21 k
Q1
2N3904
Optional Output
C
100 mF
Ripple Filter
+V
20 mH
in
100 mF
L2
in
1
C1
5
LM2576−XX
ON/OFF
1.2 to 35 V @ 3.0 A
in
Voltage
Output
is minimal.
3
GN
D
V
th
≈ 13 V
V
out

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