L5973D Datasheet, PDF (4/10 Pages) STMicroelectronics – 2.5A SWITCH STEP DOWN SWITCHING REGULATOR

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