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LTC3859AL Datasheet(PDF) 9 Page - Linear Technology

Part # LTC3859AL
Description  60V Low IQ, Triple Output, Buck/Buck/Boost Synchronous Controller
PDF  38 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3859AL Datasheet(HTML) 9 Page - Linear Technology

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LTC3899
9
3899fa
For more information www.linear.com/LTC3899
TYPICAL PERFORMANCE CHARACTERISTICS
SENSE Pins Total Input Current
vs VSENSE Voltage
Buck SENSE– Pin Input Bias
Current vs Temperature
Boost SENSE Pin Total Input
Current vs Temperature
Maximum Current Sense
Threshold vs Duty Cycle
Maximum Current Sense
Threshold vs ITH Voltage
TRACK/SS Pull-Up Current
vs Temperature
DRVCC Line Regulation
DRVCC and EXTVCC
vs Load Current
EXTVCC Switchover and DRVCC
Voltages vs Temperature
INPUT VOLTAGE (V)
0 5
11
9
7
10
8
6
5
65
25
45
55
15
35
60
20
40
50
10
30
3899 G19
DRVSET = INTVCC
DRVSET = GND
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
3899 G20
EXTVCC = 0V
EXTVCC = 8.5V
VBIAS = 12V
DRVSET = GND
EXTVCC = 5V
TEMPERATURE (°C)
-75
11
10
8
9
7
5
6
4
-25
25
-50
0
75 100
3899 G21
150
50
125
EXTVCC RISING
EXTVCC FALLING
EXTVCC RISING
EXTVCC FALLING
DRVCC
DRVCC
DRVSET = GND
DRVSET = INTVCC
VSENSE COMMON MODE VOLTAGE (V)
0 5
800
500
200
700
400
600
300
100
0
65
25
45
55
15
35
60
20
40
50
10
30
3899 G22
SENSE1, 2 PINS (BUCK)
SENSE3 PINS (BOOST)
TEMPERATURE (°C)
-75
900
800
600
700
500
200
400
100
300
0
-25
25
-50
0
75 100
3899 G23
150
50
125
VOUT > INTVCC + 0.5V
VOUT < INTVCC – 0.5V
TEMPERATURE (°C)
-75
200
180
140
160
120
60
100
40
20
80
0
-25
25
-50
0
75 100
3899 G24
150
50
125
VIN = 12V
SENSE3– PIN
SENSE3+ PIN
DUTY CYCLE (%)
0
100
90
70
80
60
30
50
20
10
40
0
20
40
10
30
60 70
3899 G25
100
50
90
80
BUCK
BOOST
VITH (V)
0
100
80
60
20
0
–20
40
–40
0.4
0.8
0.2
0.6
1.2
3899 G26
1.4
1
5% DUTY CYCLE
PULSE-SKIPPING
Burst Mode
OPERATION
FORCED CONTINUOUS MODE
TEMPERATURE (°C)
-75
12
11.5
11
9.5
10.5
9
8.5
10
8
-25
25
-50
0
75 100
3899 G27
150
50
125



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