L5987 STMicroelectronics, L5987 Datasheet - Page 34

• Manufacturer Part Number: L5987
• Description: IC REG STEPDOWN 3A 8VFQFPN
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L5987

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 0.6 V ~ 18 V
• Current - Output: 3A
• Frequency - Switching: 250kHz
• Voltage - Input: 2.9 V ~ 18 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 8-VFQFN, Exposed Pad
• Output Voltage: 0.6 V
• Output Current: 3 A
• Output Power: 1.5 W
• Input Voltage: 2.9 V to 18 V
• Switching Frequency: 250 KHz
• Mounting Style: SMD/SMT
• Duty Cycle (max): 100 %
• Low Dropout Operation: 100 % duty cycle
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Application information
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Figure 23. Junction temperature vs
Figure 25. Junction temperature vs
Figure 27. Efficiency vs output current
95
95
90
90
85
85
80
80
75
75
70
70
0.3
0.3
V
V
0.8
0.8
IN
IN
output current V
output current V
V
=5V
=5V
IN
= 5 V
1.3
1.3
Io [A]
Io [A]
1.8
1.8
V
V
V
V
Doc ID 14972 Rev 3
IN
IN
O
O
O
O
=2.5V
=2.5V
=1.8V
=1.8V
2.3
2.3
= 12 V
= 3.3 V
F
F
V
V
SW
SW
O
O
=3.3V
=3.3V
=250kHz
=250kHz
2.8
2.8
Figure 24. Junction temperature vs
Figure 26. Efficiency vs output current
Figure 28. Efficiency vs output current
92
92
90
90
88
88
86
86
84
84
82
82
80
80
78
78
76
76
0.3
0.3
95
90
85
80
75
70
65
0.3
V
V
V
IN
IN
IN
0.8
0.8
=3.3V
0.8
=12V
=12V
output current V
V
V
IN
IN
= 12 V
= 3.3 V
1.3
1.3
1.3
Io [A]
Io [A]
Io [A]
1.8
1.8
1.8
IN
V
V
V
O
O
O
2.3
V
V
V
V
V
V
2.3
2.3
=2.5V
=1.8V
=1.2V
= 5 V
O
O
O
O
O
O
=5V
=5V
=3.3V
=3.3V
=2.5V
=2.5V
F
F
SW
SW
=250kHz
=250kHz
L5987
2.8
2.8
2.8