L4973D3.3 STMicroelectronics, L4973D3.3 Datasheet - Page 5
![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
3
3.1
3.2
Electrical data
Maximum ratings
Table 2.
Thermal data
Table 3.
1. Package mounted on board
DIP-18
V
V
V
I
V
V
V
V
V
7
2
2
9
V
Symbol
-V
,V
,V
,I
11
17
12
18
10
9
R
R
Symbol
3
T
8
3
8
thJP
thJA
J
P
,T
tot
STG
V
S0-20
V
V
I
10
V
V
V
V
V
V
9
2
2
Absolute maximum ratings
Thermal data
,V
,V
,I
10
12
19
13
20
11
-V
3
8
3
Maximum thermal resistance junction-pin
Maximum thermal resistance junction-ambient
8
Input voltage
Output DC voltage
Output peak voltage at t = 0.1 μs f = 200 kHz
Maximum output current
Bootstrap voltage
Analogs input voltage (
Analogs input voltage (V
(V
(V
Inhibit
DIP 12+3+3
Power dissipation a Tpins ≤ 90 °C
(T
(T
SO-20
Power dissipation a T
Junction and storage temperature
A
A
CC
CC
= 70 °C no copper area)
= 70 °C 4 cm copper area on PCB)
= 20 V)
= 20 V)
Parameter
V
pins
CC
Parameter
CC
= 24 V
= 90 °C
= 24 V)
)
DIP-18
60
12
(1)
-40 to 150
Value
V
-0.3
-0.3
5.5
0.3
1.3
- 5
14
70
12
13
58
SO-20
-1
6
5
2
4
CC
80
Electrical data
15
int. limit.
(1)
Unit
°C/W
°C/W
°C
W
W
W
W
Unit
V
V
V
V
V
V
V
V
V
V
V
V
V
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