LM2576
TYPICAL PERFORMANCE CHARACTERISTICS
(Circuit of Figure 15)
Figure 8. Standby Quiescent Current
I stby , STANDBY QUIESCENT CURRENT (µA)
200
Vsat , SATURATION VOLTAGE (V)
180
160
140
120
100
80
60
40
20
0
TJ = 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
35
40
0
0.5
1.0
1.5
2.0
2.5
3.0
Vin, INPUT VOLTAGE (V)
SWITCH CURRENT (A)
125°C
–40°C
Figure 9. Switch Saturation Voltage
Figure 10. Oscillator Frequency
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
Vin = 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
Figure 11. Minimum Operating Voltage
Adjustable Version Only
Vout 1.23 V
ILoad = 500 mA
'
–25
0
25
50
75
100
125
TJ, JUNCTION TEMPERATURE (°C)
TJ, JUNCTION TEMPERATURE (°C)
Figure 12. Feedback Pin Current
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
TJ, JUNCTION TEMPERATURE (°C)
6
MOTOROLA ANALOG IC DEVICE DATA
MOTOROLA [ MOTOROLA, INC ]
