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LTC7813 Datasheet(PDF) 6 Page - Linear Technology

Part # LTC7813
Description  150V Low IQ, Synchronous Step-Down DC/DC Controller
PDF  38 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC7813 Datasheet(HTML) 6 Page - Linear Technology

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LTC3895
6
3895fa
For more information www.linear.com/LTC3895
Typical perForMance characTerisTics
Load Step Burst Mode
Operation
Load Step
Pulse-Skipping Mode
Load Step Forced
Continuous Mode
Inductor Current at Light Load
Soft Start-Up
Regulated Feedback Voltage
vs Temperature
Efficiency and Power Loss
vs Load Current
Efficiency vs Load Current
Efficiency vs Input Voltage
BURST EFFICIENCY
VIN = 24V
VOUT = 12V
PULSE–SKIPPING
LOSS
PULSE–SKIPPING
EFFICIENCY
FCM LOSS
FCM EFFICIENCY
FIGURE 13 CIRCUIT
BURST LOSS
LOAD CURRENT (A)
0.0001
0.001
0.01
0.1
1
10
0
10
20
30
40
50
60
70
80
90
100
1
10
100
1k
10k
3895 G01
VOUT = 12V
VIN = 24V
VIN = 48V
VIN = 100V
VIN = 140V
LOAD CURRENT (A)
0.0001
0.001
0.01
0.1
1
10
0
10
20
30
40
50
60
70
80
90
100
3895 G02
FIGURE 13 CIRCUIT
VOUT = 12V
ILOAD = 4A
INPUT VOLTAGE (V)
20
40
60
80
100
120
140
80
82
84
86
88
90
92
94
96
98
100
3895 G03
FIGURE 13 CIRCUIT
200µs/DIV
VOUT
100mV/DIV
AC COUPLED
IL
1A/DIV
3895 G04
VIN = 24V
FIGURE 13 CIRCUIT
200µs/DIV
VOUT
100mV/DIV
AC COUPLED
IL
1A/DIV
3895 G04
VIN = 24V
FIGURE 13 CIRCUIT
200µs/DIV
VOUT
100mV/DIV
AC COUPLED
IL
1A/DIV
3895 G06
VIN = 24V
FIGURE 13 CIRCUIT
200µs/DIV
FORCED
CONTINUOUS
MODE
BURST MODE
OPERATION
2A/DIV
PULSE
SKIPPING
MODE
3895 G07
VIN = 24V
FIGURE 13 CIRCUIT
2ms/DIV
VOUT
2V/DIV
RUN
2V/DIV
3895 G08
VIN = 24V
FIGURE 13 CIRCUIT
TEMPERATURE (°C)
–75 –50 –25 0
25 50 75 100 125 150
792
794
796
798
800
802
804
806
808
3895 G09



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