LM2576
TYPICAL PERFORMANCE CHARACTERISTICS
(Circuit of Figure 15)
1.0
Vout , OUTPUT VOLTAGE CHANGE (%)
0.8
0.6
0.4
0.2
0
−0.2
−0.4
−0.6
−0.8
−1.0
−50
V
in
= 20 V
I
Load
= 500 mA
Normalized at T
J
= 25°C
Vout , OUTPUT VOLTAGE CHANGE (%)
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
−0.2
−0.4
−0.6
0
5.0
10
15
20
25
30
35
40
12 V and 15 V
3.3 V, 5.0 V and ADJ
I
Load
= 500 mA
T
J
= 25°C
−25
0
25
50
75
100
125
T
J
, JUNCTION TEMPERATURE (°C)
V
in
, INPUT VOLTAGE (V)
Figure 2. Normalized Output Voltage
Figure 3. Line Regulation
2.0
INPUT − OUTPUT DIFFERENTIAL (V)
I
Load
= 3.0 A
I O, OUTPUT CURRENT (A)
1.5
6.5
V
in
= 25 V
6.0
5.5
5.0
4.5
4.0
−50
1.0
I
Load
= 500 mA
0.5
L1 = 150
mH
R
ind
= 0.1
W
0
−50
−25
0
25
50
75
100
125
−25
0
25
50
75
100
125
T
J
, JUNCTION TEMPERATURE (°C)
T
J
, JUNCTION TEMPERATURE (°C)
Figure 4. Dropout Voltage
Figure 5. Current Limit
I stby , STANDBY QUIESCENT CURRENT (
µA)
20
I Q, QUIESCENT CURRENT (mA)
18
16
14
12
10
8.0
6.0
4.0
0
5.0
10
15
20
25
30
35
40
I
Load
= 200 mA
I
Load
= 3.0 A
V
out
= 5.0 V
Measured at
Ground Pin
T
J
= 25°C
200
180
160
140
120
100
80
60
40
20
0
−50
V
in
= 12 V
V
in
= 40 V
V
ON/OFF
= 5.0 V
−25
0
25
50
75
100
125
V
in
, INPUT VOLTAGE (V)
T
J
, JUNCTION TEMPERATURE (°C)
Figure 6. Quiescent Current
Figure 7. Standby Quiescent Current
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