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LTC3890EUH Datasheet(PDF) 6 Page - Linear Technology

Part # LTC3890EUH
Description  60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller
Download  36 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3890EUH Datasheet(HTML) 6 Page - Linear Technology

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LTC3890
6
3890f
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
SENSEPin Input Bias Current
Maximum Current Sense
Threshold vs Duty Cycle
Foldback Current Limit
Quiescent Current vs Temperature
INTVCC vs Load Current
TEMPERATURE (°C)
–45
4.0
4.2
4.6
4.8
5.0
6.0
5.4
5
55
80
3890 G11
4.4
5.6
5.8
5.2
–20
30
105
130
INTVCC
EXTVCC RISING
EXTVCC FALLING
VITH (V)
0
40
60
80
0.6
1.0
3890 G13
20
0
0.2
0.4
0.8
1.2
1.4
–20
–40
Burst Mode
OPERATION
PULSE SKIPPING MODE
FORCED CONTINUOUS MODE
ILIM = FLOAT
ILIM = INTVCC
ILIM = GND
DUTY CYCLE (%)
0
50
40
60
70
80
3890 G15
30
20
20
40 50
100
80
60
10
30
90
70
ILIM = FLOAT
ILIM = INTVCC
ILIM = GND
TEMPERATURE (°C)
–45
75
30
3890 G17
60
50
–20
5
55
45
40
80
70
65
55
80
105
130
LOAD CURRENT (mA)
0
5.10
5.15
5.20
160
3890 G18
5.05
5.00
4.95
20 40 60 80 100 120 140
180 200
EXTVCC = 0V
EXTVCC = 8.5V
VIN = 12V
INPUT VOLTAGE (V)
0
200
300
20
30 35 40 45 50 55 60 65
15
10
525
3890 G10
150
100
50
250
NO LOAD
300μA
INPUT VOLTAGE (V)
4.8
5.0
5.2
20
30 35 40 45 50 55 60 65
15
10
525
3890 G12
4.9
5.1
VSENSE COMMON MODE VOLTAGE (V)
0
–800
–500
–600
–700
–400
–300
–200
0
5
10
15
20
3890 G14
25
–100
FEEDBACK VOLTAGE (MV)
0
40
60
800
3890 G16
20
0
200
400 500
80
30
50
10
70
600
100
300
700
ILIM = FLOAT
ILIM = INTVCC
ILIM = GND


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