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L5973D013TR

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
L5973D Typical characteristics
7/17
4 Typical characteristics
Figure 3. Line regulation Figure 4. Shutdown current vs junction
temperature
Figure 5. Output voltage vs junction
temperature
Figure 6. Switching frequency vs
junction temperature
Figure 7. Quiescent current vs junction
temperature
3.276
3.28
3.284
3.288
3.292
3.296
3.3
3.304
3.308
3.312
010203040
Vcc (V)
Tj = 125°C
Tj = 25°C
Vcc = 12V
Vo = 3.3V
Vo (V)
30
40
50
60
70
-50
0
50 100 150
Ishd (
µ
A)
Vcc = 12V
Tj (°C)
Tj (°C)
Vcc=12V
1.2
1.21
1.22
1.23
1.24
1.25
-50 0 50 100 150
Vo (V)
Vcc = 12V
220
230
240
250
260
-50 0 50 100 150
Tj (°C)
Fsw (KHz)
Vcc = 12V
Vo = 3.3V
1.2
1.4
1.6
1.8
2
-50
050
100 150
Tj (°C)
Iq (mA)
Vcc = 12V
DC = 0%
Typical characteristics L5973D
8/17
Figure 8. Junction temperature vs
output current
Figure 9. Junction temperature vs
output current
Figure 10. Efficiency vs output current Figure 11. Efficiency vs output current
20
30
40
50
60
70
80
90
100
110
120
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6
Io(A)
Tj(°C)
Vin=5V
Tamb=25°C
Vo=2.5V
Vo=3.3V
Vo=1.8V
20
30
40
50
60
70
80
90
100
110
120
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6
Io (A)
Tj (°C)
Vin=12V
Tamb=25°C
Vo=3.3V
Vo=2.5V
Vo=5V
67
69
71
73
75
77
79
81
83
85
87
89
91
93
95
0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3
Io (A)
Efficiency (%)
Vo=2.5V
Vo=3.3V
Vo=1.8V
Vin=5V
65
67
69
71
73
75
77
79
81
83
85
87
89
91
0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3
Io (A)
Efficiency (%)
Vo=2.5V
Vo=3.3V
Vo=5V
Vin=12V
L5973D Application circuit
9/17
5 Application circuit
In figure 6 is shown the demonstration board application circuit, where the input supply
voltage, V
CC
, can range from 4 V to 25 V due to the rated voltage of the input capacitor and
the output voltage is adjustable from 1.235 V to V
CC
.
Figure 12. Demonstration board application circuit
Table 5. Component list
Reference Part number Description Manufacturer
C1 GRM32DR61E106KA12L 10 µF, 25 V Murata
C2 POSCAP 6TPB330M 330 µF, 6.3 V Sanyo
C3 C1206C221J5GAC 220 pF, 5%, 50 V KEMET
C4 C1206C223K5RAC 22 nF, 10%, 50 V KEMET
R1 5.6 K, 1%, 0.1 W 0603 Neohm
R2 3.3 K, 1%, 0.1 W 0603 Neohm
R3 4.7 K, 1%, 0.1 W 0603 Neohm
D1 STPS2L25U 2 A, 25 V ST
L1 DO3316P-153 15 µH, 3 A COILCRAFT
D03IN1440
8
4
5
1
7
L5973D
C1
10µF
25V
CERAMIC
C2
330µF
6.3V
VOUT=3.3V
VIN = 4.4V to 25V
R1
5.6K
R2
3.3K
R3
4.7K
C4
22nF
C3
220pF
3
L1 15µH
D1
STPS2L25U
COMP
VCC
OUT
FB
GNDINH
2
6
3.3V
SYNC.
VREF
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

L5973D013TR

Mfr. #:
Buy L5973D013TR
Manufacturer:
STMicroelectronics
Description:
Switching Voltage Regulators 2.5 A Step-DN Switching Reg
Lifecycle:
New from this manufacturer.
Delivery:
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