LM2576T-012 ON Semiconductor, LM2576T-012 Datasheet - Page 8
![IC REG SW 3A 12V STEPDWN TO220-5](/photos/36/39/363974/to220-5_sml.jpg)
LM2576T-012
Manufacturer Part Number
LM2576T-012
Description
IC REG SW 3A 12V STEPDWN TO220-5
Manufacturer
ON Semiconductor
Type
Step-Down (Buck)r
Datasheet
1.LM2576D2T-ADJR4G.pdf
(28 pages)
Specifications of LM2576T-012
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
Through Hole
Package / Case
TO-220-5 (Straight Leads)
Mounting Style
Through Hole
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Power - Output
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM2576T-012G
Manufacturer:
ON Semiconductor
Quantity:
2 000
circuit board is very important. Rapidly switching currents
associated with wiring inductance, stray capacitance and
parasitic inductance of the printed circuit board traces can
generate
electromagnetic interferences (EMI) and affect the desired
operation. As indicated in the Figure 15, to minimize
inductance and ground loops, the length of the leads
indicated by heavy lines should be kept as short as possible.
ground plane construction should be used.
As in any switching regulator, the layout of the printed
For best results, single−point grounding (as indicated) or
voltage
7.0 V − 40 V
Unregulated
DC Input
7.0 V − 40 V
Unregulated
transients
DC Input
C
100 mF
in
which
V
C
100 mF
in
1
in
3
V
in
1
Adjustable
C
C
D1
L1
R1
R2
can
Adjustable Output Voltage Versions
GN
D
LM2576
in
out
PCB LAYOUT GUIDELINES
3
Fixed Output Voltage Versions
Figure 15. Typical Test Circuit
Fixed Output
−
−
−
−
−
−
GN
D
LM2576
generate
100 mF, 75 V, Aluminium Electrolytic
1000 mF, 25 V, Aluminium Electrolytic
Schottky, MBR360
100 mH, Pulse Eng. PE−92108
2.0 k, 0.1%
6.12 k, 0.1%
5
http://onsemi.com
V out + V
R2 + R1
Where V
between 1.0 k and 5.0 k
ON/OFF
5
LM2576
2
4
Output
Feedback
ref
ON/OFF
ref
8
= 1.23 V, R1
V out
V ref
2
4
Feedback
Output
1.0 ) R2
(emitter of the internal switch) of the LM2576 should be
kept to a minimum in order to minimize coupling to sensitive
circuitry.
important to keep the sensitive feedback wiring short. To
assure this, physically locate the programming resistors near
to the regulator, when using the adjustable version of the
LM2576 regulator.
– 1.0
On the other hand, the PCB area connected to the Pin 2
Another sensitive part of the circuit is the feedback. It is
100 mH
D1
MBR360
R1
L1
100 mH
D1
MBR360
L1
C
1000 mF
out
C
1000 mF
out
R2
R1
Load
V
out
5,000 V
Load
V
out