L5973D
Figure 1. Line Regulation
Figure 4. Shutdown Current vs.Junction
Temperature
Vo (V)
3.312
µ
Ishd ( A)
Vcc = 12V
Vo = 3.3V
3.304
70
60
50
40
3.308
Tj = 25°C
3.3
3.296
3.292
3.288
3.284
3.28
Vcc = 12V
Tj = 125°C
3.276
30
0
10
20
Vcc (V)
30
40
-50
50
100
150
0
Tj (°C)
Figure 2. Output Voltage vs. Junction
Temperature
Figure 5. Switching Frequency vs.Junction
Temperature
Vo (V)
1.25
Fsw (KHz)
260
1.24
1.23
250
240
1.22
Vcc = 12V
Vcc=12V
Vcc = 12V
230
1.21
Vo = 3.3V
1.2
-50
220
-50
0
50
100
150
0
50
100
150
Tj (°C)
Tj (°C)
Figure 3. Quiescent Current vs. Junction
Temperature
Iq (mA)
2
1.8
1.6
Vcc = 12V
DC = 0%
1.4
1.2
-50
100
150
0
50
Tj (°C)
4/10
STMICROELECTRONICS [ ST ]
