L4973D3.3 STMicroelectronics, L4973D3.3 Datasheet - Page 15
![IC BUCK SYNC 3.3/ADJ 3.5A SOIC20](/photos/6/56/65691/497-20-soic__7_5mm_width__series_sml.jpg)
L4973D3.3
Manufacturer Part Number
L4973D3.3
Description
IC BUCK SYNC 3.3/ADJ 3.5A SOIC20
Manufacturer
STMicroelectronics
Type
Step-Down (Buck)r
Datasheet
1.L4973D5.1-013TR.pdf
(28 pages)
Specifications of L4973D3.3
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
3.3V, 0.5 ~ 50 V
Current - Output
3.5A
Frequency - Switching
100kHz ~ 300kHz
Voltage - Input
8 ~ 55 V
Operating Temperature
-40°C ~ 150°C
Mounting Type
Surface Mount
Package / Case
20-SOIC (7.5mm Width)
Power - Output
4W
Output Voltage
50 V
Mounting Style
SMD/SMT
For Use With
497-4743 - BOARD EVAL FOR L4973X SW REG
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
L4973D3.3
Manufacturer:
ST-MICROE
Quantity:
251
Part Number:
L4973D3.3
Manufacturer:
ST
Quantity:
20 000
Company:
Part Number:
L4973D3.3-013TR
Manufacturer:
ST
Quantity:
1 000
Part Number:
L4973D3.3-013TR
Manufacturer:
ST
Quantity:
20 000
L4973
Figure 17. Load regulation (see
Figure 19. Load regulation (see
5.15
5.05
3.35
3.34
3.33
3.32
3.31
V
(V)
5.1
5.0
V
(V)
3.3
O
O
0
0
Figure
Figure
1
1
V
V
CC
CC
= 35V
= 35V
7)
4)
2
2
Tj=25˚C
Tj=125˚C
Tj=25˚C
3
3
Tj=125˚C
D97IN640
D97IN661
I
I
O
O
(A)
(A)
Figure 18. Line regulation (see
Figure 20. Switching frequency vs.
(KHz)
3.35
3.34
3.33
3.32
3.31
500
200
100
fsw
(V)
3.3
V
50
20
10
5
O
0
0
10
R2 and C7
20
20
40
Typical characteristics
30
(Figure
60
I
O
40
= 1A
Tj=125˚C
Tj=25˚C
Tamb=25˚C
80
50
D97IN660A
4)
D97IN630
Figure
V
R2(KΩ)
CC
(V)
15/28
8)