L5987TR STMicroelectronics, L5987TR Datasheet - Page 34
![IC REG SW 3A STEPDOWN 8-VFQFPN](/photos/7/59/75991/l5987tr_sml.jpg)
L5987TR
Manufacturer Part Number
L5987TR
Description
IC REG SW 3A STEPDOWN 8-VFQFPN
Manufacturer
STMicroelectronics
Type
Step-Down (Buck)r
Datasheet
1.L5987TR.pdf
(41 pages)
Specifications of L5987TR
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
0.6 ~ 18 V
Current - Output
3A
Frequency - Switching
250kHz
Voltage - Input
2.9 ~ 18 V
Operating Temperature
-40°C ~ 150°C
Mounting Type
Surface Mount
Package / Case
8-VFQFN, 8-VFQFPN
Power - Output
1.5W
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 %
For Use With
497-8369 - BOARD EVALUATION FOR L5987
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-8494-2
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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