LM2576
OPERATING RATINGS
(Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee
specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.)
Rating
Operating Junction Temperature Range
Supply Voltage
Symbol
T
J
V
in
Value
−40 to +125
40
Unit
°C
V
SYSTEM PARAMETERS
(Note 1 Test Circuit Figure 15)
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, V
in
= 12 V for the 3.3 V, 5.0 V, and Adjustable version, V
in
= 25 V
for the 12 V version, and V
in
= 30 V for the 15 V version. I
Load
= 500 mA. For typical values T
J
= 25°C, for min/max values T
J
is the
operating junction temperature range that applies Note 2, unless otherwise noted.)
Characteristics
LM2576−3.3
(Note 1 Test Circuit Figure 15)
Output Voltage (V
in
= 12 V, I
Load
= 0.5 A, T
J
= 25°C)
Output Voltage (6.0 V
≤
V
in
≤
40 V, 0.5 A
≤
I
Load
≤
3.0 A)
T
J
= 25°C
T
J
= −40 to +125°C
Efficiency (V
in
= 12 V, I
Load
= 3.0 A)
LM2576−5
(Note 1 Test Circuit Figure 15)
Output Voltage (V
in
= 12 V, I
Load
= 0.5 A, T
J
= 25°C)
Output Voltage (8.0 V
≤
V
in
≤
40 V, 0.5 A
≤
I
Load
≤
3.0 A)
T
J
= 25°C
T
J
= −40 to +125°C
Efficiency (V
in
= 12 V, I
Load
= 3.0 A)
LM2576−12
(Note 1 Test Circuit Figure 15)
Output Voltage (V
in
= 25 V, I
Load
= 0.5 A, T
J
= 25°C)
Output Voltage (15 V
≤
V
in
≤
40 V, 0.5 A
≤
I
Load
≤
3.0 A)
T
J
= 25°C
T
J
= −40 to +125°C
Efficiency (V
in
= 15 V, I
Load
= 3.0 A)
LM2576−15
(Note 1 Test Circuit Figure 15)
Output Voltage (V
in
= 30 V, I
Load
= 0.5 A, T
J
= 25°C)
Output Voltage (18 V
≤
V
in
≤
40 V, 0.5 A
≤
I
Load
≤
3.0 A)
T
J
= 25°C
T
J
= −40 to +125°C
Efficiency (V
in
= 18 V, I
Load
= 3.0 A)
LM2576 ADJUSTABLE VERSION
(Note 1 Test Circuit Figure 15)
Feedback Voltage (V
in
= 12 V, I
Load
= 0.5 A, V
out
= 5.0 V, T
J
= 25°C)
Feedback Voltage (8.0 V
≤
V
in
≤
40 V, 0.5 A
≤
I
Load
≤
3.0 A, V
out
= 5.0 V)
T
J
= 25°C
T
J
= −40 to +125°C
Efficiency (V
in
= 12 V, I
Load
= 3.0 A, V
out
= 5.0 V)
V
out
V
out
1.193
1.18
η
−
1.23
−
77
1.267
1.28
−
%
1.217
1.23
1.243
V
V
V
out
V
out
14.4
14.25
η
−
15
−
88
15.6
15.75
−
%
14.7
15
15.3
V
V
V
out
V
out
11.52
11.4
η
−
12
−
88
12.48
12.6
−
%
11.76
12
12.24
V
V
V
out
V
out
4.8
4.75
η
−
5.0
−
77
5.2
5.25
−
%
4.9
5.0
5.1
V
V
V
out
V
out
3.168
3.135
η
−
3.3
−
75
3.432
3.465
−
%
3.234
3.3
3.366
V
V
Symbol
Min
Typ
Max
Unit
1. External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance.
When the LM2576 is used as shown in the Figure 15 test circuit, system performance will be as shown in system parameters section.
2. Tested junction temperature range for the LM2576:
T
low
= −40°C
T
high
= +125°C
http://onsemi.com
3
ONSEMI [ ON SEMICONDUCTOR ]
