LT1777C View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LT1777C' PDF : 24 Pages View PDF
LT1777
TYPICAL APPLICATIONS
Efficiency
VIN = 12V
90
VIN = 12V
80
VOUT = 5V
TA = 25°C
70
60
50
LSENSE =
0µH
1µH
2.2µH
40
30
20
1
10
100
ILOAD (mA)
1000
1777 F09a
VIN = 24V
90
VIN = 24V
80
VOUT = 5V
TA = 25°C
70
60
50
LSENSE =
0µH
1µH
2.2µH
40
30
20
1
10
100
ILOAD (mA)
1000
1777 F09c
Internal Dissipation
1.4
VIN = 12V
1.2
VOUT = 5V
TA = 25°C
1.0
0.8
0.6
0.4
LSENSE =
2.2µH
1µH
0µH
0.2
0
10
100
IOUT (mA)
1000
1777 F09b
1.4
VIN = 24V
1.2
VOUT = 5V
TA = 25°C
1.0
0.8
0.6
0.4
0.2
0
10
LSENSE =
2.2µH
1µH
0µH
100
IOUT (mA)
1000
1777 F09d
VIN = 36V
90
VIN = 36V
80
VOUT = 5V
TA = 25°C
70
60
50
LSENSE =
0µH
1µH
2.2µH
1.4
VIN = 36V
1.2
VOUT = 5V
TA = 25°C
1.0
0.8
0.6
LSENSE =
2.2µH
1µH
0µH
40
0.4
30
0.2
20
1
10
100
ILOAD (mA)
1000
1777 F09e
0
10
100
IOUT (mA)
1000
1777 F09f
Figure 9. Efficiency and LT1777 Internal Dissipation for the Basic 5V Output Application
18
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