E-L4973D3.3-TR STMICROELECTRONICS [STMicroelectronics], E-L4973D3.3-TR Datasheet - Page 16

• Manufacturer Part Number: E-L4973D3.3-TR
• Description: 3.5A step down switching regulator
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Typical characteristics
16/27
Figure 27. Efficiency vs. output voltage
Figure 29. Efficiency vs. output current
(%)
(%)
98
96
94
92
90
88
86
90
85
80
75
η
η
0
0
5
(Diode STPS745D)
(see
Vcc=24V
1
10
Figure
Vcc=48V
100KHz
15
200KHz
Vcc=12V
2
20
7)
V
f
I
V
sw
O
25
O
CC
= 3A
= 5.1V
= 200KHz
= 35V
3
30
D97IN642
D97IN646
V
I
O
O
(A)
(V)
Figure 28. Efficiency vs. output current (
Figure 30. Efficiency vs. output current
(%)
(%)
95
90
85
80
90
85
80
75
η
η
0
0
see
(see
Vcc=24V
1
1
Figure
Vcc=24V
Figure
Vcc=12V
Vcc=48V
Vcc=12V
Vcc=48V
2
2
7)
8)
V
f
V
f
sw
sw
O
O
= 3.3V
= 100KHz
= 100KHz
= 5.1V
3
3
D97IN645
D97IN644
I
I
O
O
(A)
(A)
L4973