L4973D3.3-013TR STMicroelectronics, L4973D3.3-013TR Datasheet - Page 22

• Manufacturer Part Number: L4973D3.3-013TR
• Description: IC REG SW STEP DOWN 3.5A 20-SOIC
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L4973D3.3-013TR

• 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: 5.1 V
• Output Current: 3.5 A
• Input Voltage: 8 V to 55 V
• Switching Frequency: 90 KHz to 110 KHz
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 97 %
• For Use With: 497-4743 - BOARD EVAL FOR L4973X SW REG
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-3358-2

Application ideas
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Figure 43. Synchronization example
Figure 44. Multi output not isolated (pin out referred to DIP12+3+3)
V
V
CC2
CC
C1
V
P
O2
1
O2
= V
< 20% P
R2
C2
L4973
13,14,15
4,5,6
O1
7,8
C7
C3
n
O1
1
18
n
+ n
1
2
C4
C5
18
L4973
13,14,15
4,5,6
7,8
1
17
16
7,8
11
R1
C6
D97IN667A
1
INH
10
L4973
13,14,15
4,5,6
SYNC
V
CC1
18
12
2,3
9
V
CC
C8
D1
L1
1
L4973
13,14,15
4,5,6
n2
n1
7,8
C9
18
D2
C10
18
1
C11
L4973
7,8
13,14,15
D97IN669
4,5,6
L4973
Vo2
Vo1