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LTC3834 Datasheet(PDF) 6 Page - Linear Technology

Part # LTC3834
Description  60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller
PDF  40 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3834 Datasheet(HTML) 6 Page - Linear Technology

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LTC3890-3
6
38903f
For more information www.linear.com/3890-3
Typical perForMance characTerisTics
Total Input Supply Current
vs Input Voltage
EXTVCC Switchover and INTVCC
Voltages vs Temperature
INTVCC Line Regulation
Maximum Current Sense Voltage
vs ITH Voltage
SENSE– Pin Input Bias Current
Maximum Current Sense
Threshold vs Duty Cycle
Current Limit
vs Feedback Voltage
Quiescent Current vs Temperature
INTVCC vs Load Current
DUTY CYCLE (%)
0
75
85
80
80
38903 G15
65
70
60
20
40 50
100
90
60
10
30
90
70
INPUT VOLTAGE (V)
0
200
300
20
30 35 40 45 50 55 60 65
15
10
5
25
38903 G10
150
100
50
250
NO LOAD
300µA LOAD
VOUT = 3.3V
FIGURE 13 CIRCUIT
VSENSE COMMON MODE VOLTAGE (V)
0
20
38903 G14
400
300
10
15
5
25
800
700
600
500
200
100
0
–100
TEMPERATURE (°C)
–75
75
50
25
0
38903 G17
60
50
–50 –25
75
45
30
40
35
80
70
65
55
100 125 150
VIN = 12V
LOAD CURRENT (mA)
0
5.25
40
38903 G18
4.50
20
60
4.00
5.50
5.00
4.75
4.25
80
100
EXTVCC = 5V
EXTVCC = 8.5V
EXTVCC = 0V
VIN = 12V
VITH (V)
0
40
60
80
0.6
1.0
38903 G13
20
0
0.2
0.4
0.8
1.2
1.4
–20
–40
Burst Mode
OPERATION
PULSE-SKIPPING MODE
5% DUTY CYCLE
FORCED CONTINUOUS MODE
INPUT VOLTAGE (V)
3.0
4.0
4.5
5.5
20
30 35 40 45 50 55 60 65
15
10
0 5
25
38903 G12
3.5
5.0
ILOAD = 10mA
TEMPERATURE (°C)
–75
4.0
4.2
4.6
4.8
5.0
6.0
5.4
–25
25 50 75 100
38903 G11
4.4
5.6
5.8
5.2
–50
0
125 150
INTVCC
EXTVCC RISING
EXTVCC FALLING
FEEDBACK VOLTAGE (MV)
0
40
60
800
38903 G16
20
0
200
400 500
80
30
50
10
70
600
100
300
700



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