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LT1777CS Datasheet(PDF) 18 Page - Linear Technology

Part # LT1777CS
Description  Low Noise Step-Down Switching Regulator
PDF  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1777CS Datasheet(HTML) 18 Page - Linear Technology

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



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