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LT8705 Datasheet(PDF) 6 Page - Linear Technology

Part # LT8705
Description  Low IQ, 38V Synchronous BoostBuck Controller
PDF  44 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT8705 Datasheet(HTML) 6 Page - Linear Technology

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LTC7812
6
7812fc
For more information www.linear.com/LTC7812
TYPICAL PERFORMANCE CHARACTERISTICS
Power Loss vs Load Current
VIN = 9V
Power Loss vs Load Current
VIN = 14V
Power Loss vs Load Current
VIN = 18V
Efficiency vs Input Voltage
Efficiency vs Load Current
VIN = 9V
Efficiency vs Load Current
VIN = 14V
Efficiency vs Load Current
VIN = 18V
FIGURE 9 CIRCUIT
VOUT = 12V
IOUT = 4A
IOUT = 8A
INPUT VOLTAGE (V)
0
5
10
15
20
25
30
35
40
90
92
93
95
97
98
100
7812 G07
TEMPERATURE (°C)
–75
808
806
802
798
794
804
800
796
792
0
25 50 75
150
125
100
–50
7812 G08
–25
TEMPERATURE (°C)
–75
1.212
1.209
1.203
1.191
1.194
1.197
1.206
1.200
1.188
0
25 50 75
150
120
100
–50
7812 G09
–25
Buck Regulated Feedback Voltage
vs Temperature
Boost Regulated Feedback
Voltage vs Temperature
VOUT = 12V
FIGURE 9 CIRCUIT
LOAD CURRENT (A)
0.0001
0.001
0.01
0.1
1
9
0
10
20
30
40
50
60
70
80
90
100
7812 G01
Burst Mode
OPERATION
PULSE-SKIPPING
MODE
FORCED
CONTINUOUS
MODE
LOAD CURRENT (A)
0.0001
0.001
0.01
0.1
1
9
0
10
20
30
40
50
60
70
80
90
100
7812 G02
Burst Mode
OPERATION
PULSE-SKIPPING
MODE
FORCED
CONTINUOUS
MODE
VOUT = 12V
FIGURE 9 CIRCUIT
LOAD CURRENT (A)
0.0001
0.001
0.01
0.1
1
9
0.001
0.01
0.1
1
10
7812 G04
Burst Mode
OPERATION
PULSE-SKIPPING
MODE
FORCED CONTINUOUS MODE
VOUT = 12V
FIGURE 9 CIRCUIT
LOAD CURRENT (A)
0.0001
0.001
0.01
0.1
1
9
0.001
0.01
0.1
1
10
7812 G05
Burst Mode
OPERATION
PULSE-SKIPPING
MODE
FORCED CONTINUOUS MODE
VOUT = 12V
FIGURE 9 CIRCUIT
LOAD CURRENT (A)
0.0001
0.001
0.01
0.1
1
9
0.001
0.01
0.1
1
10
7812 G06
Burst Mode
OPERATION
PULSE-SKIPPING
MODE
FORCED CONTINUOUS MODE
VOUT = 12V
FIGURE 9 CIRCUIT
LOAD CURRENT (A)
0.0001
0.001
0.01
0.1
1
9
0
10
20
30
40
50
60
70
80
90
100
7812 G03
Burst Mode
OPERATION
PULSE-SKIPPING
MODE
FORCED
CONTINUOUS
MODE
VOUT = 12V
FIGURE 9 CIRCUIT



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