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LTC3892-1 Datasheet(PDF) 8 Page - Linear Technology

Part # LTC3892-1
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

LTC3892-1 Datasheet(HTML) 8 Page - Linear Technology

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LTC3892/LTC3892-1
8
38921f
For more information www.linear.com/LTC3892
Typical perForMance characTerisTics
SENSE Pins Total Input Current
vs VSENSE Voltage
SENSEPin Input Bias Current vs
Temperature
Foldback Current Limit
Maximum Current Sense
Threshold vs Duty Cycle
Maximum Current Sense
Threshold vs ITH Voltage
Shutdown (RUN) Threshold
vs Temperature
DRVCC and EXTVCC
vs Load Current
EXTVCC Switchover and DRVCC
Voltages vs Temperature
Undervoltage Lockout
Threshold vs Temperature
LOAD CURRENT (mA)
0
6.4
5.6
4.8
6
5.2
4.4
6.2
5.4
4.6
5.8
5
4.2
4
150
75
25
125
50
100
3892 G10
EXTVCC = 0V
EXTVCC = 8.5V
VBIAS = 12V
DRVSET = GND
EXTVCC = 5V
TEMPERATURE (°C)
–75
11
10
8
7
5
9
6
4
3892 G11
150
125
25
0
–50
75 100
–25
50
DRVCC (DRVSET = INTVCC)
EXTVCC RISING
EXTVCC FALLING
EXTVCC RISING
EXTVCC FALLING
DRVCC (DRVSET = 0V)
DRVUV = INTVCC
DRVUV = GND
TEMPERATURE (°C)
–75
8
7.5
5.5
4.5
6.5
3.5
3
7
5
6
4
3892 G12
150
125
25
0
–50
75 100
–25
50
RISING
FALLING
RISING
FALLING
DRVUV = INTVCC
DRVUV = GND
VSENSE COMMON MODE VOLTAGE (V)
0
800
700
300
100
500
0
600
200
400
3892 G13
65
60
25
15
5
45
55
10
35
20
40
50
30
TEMPERATURE (°C)
–75
900
500
300
700
100
0
800
400
600
200
3892 G14
150
125
25
0
–50
75 100
–25
50
VOUT > INTVCC + 0.5V
VOUT < INTVCC – 0.5V
FEEDBACK VOLTAGE (mV)
0
100
90
50
30
70
10
0
80
40
60
20
3892 G15
800
400
300
100
600 700
200
500
ILIM = INTVCC
ILIM = FLOAT
ILIM = GND
DUTY CYCLE (%)
0
100
90
50
30
70
10
0
80
40
60
20
3892 G16
100
40
30
10
60
90
80
70
20
50
ILIM = INTVCC
ILIM = FLOAT
ILIM = GND
VITH (V)
0
100
0
–20
–40
80
40
60
20
3892 G17
1.4
0.2
0.6
1.2
1
0.8
0.4
ILIM = INTVCC
ILIM = FLOAT
ILIM = GND
Burst Mode
OPERATION
5% DUTY CYCLE
PULSE-SKIPPING
FORCED CONTINUOUS MODE
TEMPERATURE (°C)
–75
1.4
1.25
1.15
1.35
1.05
1
1.2
1.3
1.1
3892 G18
150
125
25
0
–50
75 100
–25
50
RISING
FALLING


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