LM2576
TYPICAL PERFORMANCE CHARACTERISTICS
(Circuit of Figure 15)
I stby , STANDBY QUIESCENT CURRENT (µA)
200
Vsat , SATURATION VOLTAGE (V)
35
180
160
140
120
100
80
60
40
20
0
T
J
= 25°C
1.6
1.4
1.2
1.0
0.8 25°C
0.6
0.4
0.2
0
0
5
10
15
20
25
30
40
0
0.5
1.0
1.5
2.0
2.5
3.0
V
in
, INPUT VOLTAGE (V)
SWITCH CURRENT (A)
125°C
−40°C
Figure 8. Standby Quiescent Current
Figure 9. Switch Saturation Voltage
8.0
NORMALIZED FREQUENCY (%)
6.0
V in, INPUT VOLTAGE (V)
4.0
2.0
0
−2.0
−4.0
−6.0
−8.0
−10
−50
−25
0
25
50
75
100
125
V
in
= 12 V
Normalized at
25°C
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
−50
−25
0
25
50
75
100
125
V
out
'
1.23 V
I
Load
= 500 mA
Adjustable Version Only
T
J
, JUNCTION TEMPERATURE (°C)
T
J
, JUNCTION TEMPERATURE (°C)
Figure 10. Oscillator Frequency
Figure 11. Minimum Operating Voltage
100
Ib , FEEDBACK PIN CURRENT (nA)
80
60
40
20
0
−20
−40
−60
−80
−25
0
25
50
75
100
125
Adjustable Version Only
−100
−50
T
J
, JUNCTION TEMPERATURE (°C)
Figure 12. Feedback Pin Current
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