L5973AD STMicroelectronics, L5973AD Datasheet - Page 15

• Manufacturer Part Number: L5973AD
• Description: IC REG SW 2A STEPDOWN 8-SOIC
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L5973AD

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.24 ~ 35 V
• Current - Output: 2A
• Frequency - Switching: 500kHz
• Voltage - Input: 4 ~ 36 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width) Exposed Pad, 8-eSOIC. 8-HSOIC
• Power - Output: 2.25W
• Output Voltage: 35 V
• Output Current: 2 A
• Input Voltage: 4 V to 36 V
• Switching Frequency: 500 KHz
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 100 %
• Low Dropout Operation: 100 % duty cycle
• For Use With: 497-4134 - EVAL BOARD FOR L5973 SERIES497-4133 - EVAL BOARD FOR L5973 SERIES
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-1417-5; 497-1417-5; 497-4565-5; E-L5973AD

L5973AD
Figure 9.
Figure 11. Efficiency vs output current
Tj(°C )
Tj(°C )
100
100
90
90
80
80
70
70
60
60
50
50
40
40
30
30
20
20
0.2
0.2
95
95
90
90
85
85
80
80
75
75
70
70
65
65
0.2
0.2
Vin=5V
Vin=5V
Tam b=25°C
Tam b=25°C
0.4
0.4
0.4
0.4
Vin=5V
Vin=5V
Junction temperature vs output
current
0.6
0.6
0.6
0.6
0.8
0.8
0.8
0.8
1
1
Io(A )
Io(A )
1
1
1.2
1.2
Io(A)
Io(A)
1.2
1.2
1.4
1.4
Vout=1.8V
Vout=1.8V
1.4
1.4
Vout=2.5V
Vout=2.5V
Vout=3.3V
Vout=3.3V
Vo=3.3V
Vo=3.3V
1.6
1.6
1.6
1.6
Vo=1.8V
Vo=1.8V
1.8
1.8
1.8
1.8
Doc ID 9552 Rev 9
2
2
Vo=2.5V
Vo=2.5V
2
2
Figure 10. Junction temperature vs output
Figure 12. Efficiency vs output current
110
110
100
100
Tj(C )
Tj(C )
90
90
80
80
70
70
60
60
50
50
40
40
30
30
20
20
95
95
90
90
85
85
80
80
75
75
70
70
65
65
0.2
0.2
Vin=12V
Vin=12V
Tam b=25°C
Tam b=25°C
0.2
0.2
0.4
0.4
0.4
0.4
Vin=12V
Vin=12V
0.6
0.6
current
Additional features and protections
0.6
0.6
0.8
0.8
0.8
0.8
1
1
Io(A )
Io(A )
1
1
1.2
1.2
Io(A)
Io(A)
1.2
1.2
Vout=2.5V
Vout=2.5V
Vout=5V
Vout=5V
1.4
1.4
V o=5V
V o=5V
1.4
1.4
1.6
1.6
1.6
1.6
V o=2.5V
V o=2.5V
1.8
1.8
Vout=3.3V
Vout=3.3V
1.8
1.8
2
2
V o=3.3V
V o=3.3V
15/22
2
2