L4973V3.3 STMicroelectronics, L4973V3.3 Datasheet - Page 13

• Manufacturer Part Number: L4973V3.3
• Description: IC REG SW 3.5A STEPDOWN 18PWRDIP
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L4973V3.3

• 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: Through Hole
• Package / Case: 18-DIP (0.300", 7.62mm)
• Power - Output: 5W
• Output Voltage: 3.36 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: Through Hole
• Duty Cycle (max): 97 %
• For Use With: 497-4743 - BOARD EVAL FOR L4973X SW REG
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-1413-5

L4973
7
Typical characteristics
Figure 9.
Figure 11. Stand by drain current vs.
Ibias
(mA)
Ibias
(μA)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
150
100
50
0
0
V
Tamb=25˚C
0% DC
inh
10
10
Quiescent drain current vs.
input voltage (0% duty cycle)
input voltage
= 5V
20
20
30
30
200KHz-R2=22K
25˚C
125˚C
40
40
C7=1.2nF
100KHz-R2=20K
0Hz
50 V
50 V
D97IN635A
D97IN633A
C7=2.7nF
CC
CC
(V)
(V)
Figure 10. Quiescent drain current vs.
Figure 12. Reference voltage vs.
V
5.15
5.05
(mA)
Ibias
(V)
5.1
5.0
4.0
3.5
3.0
2.5
REF
-50
-40
-20
0% DC
V
junction temperature
junction temperature (pin 16)
CC
= 35V
0
0
Vcc=35V
20
Typical characteristics
40
50
0Hz
200KHz-R2=22K
100KHz-R2=20K
60
Pin 16
C7=1.2nF
100
80
C7=2.7nF
100
D97IN637
D97IN634
Tj(˚C)
Tj(˚C)
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