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LTC3569 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC3569
Description  Triple Buck Regulator With 1.2A and Two 600mA Outputs and Individual Programmable References
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3569 Datasheet(HTML) 5 Page - Linear Technology

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LTC3569
5
3569f
Efficiency vs VSUPPLY
OUT1 = 1.8V
Efficiency vs VSUPPLY
OUT2 = 1.2V
Efficiency vs VSUPPLY
OUT3 = 1.5V
TYPICAL PERFORMANCE CHARACTERISTICS
Oscillator Frequency
vs Temperature
RDS(ON) SW1
vs VSUPPLY and Temperature
RDS(ON) SW2 and SW3
vs VSUPPLY and Temperature
VFB vs Temperature
ISVIN vs VSUPPLY Pulse Skip
ISVIN
vs VSUPPLY Burst Mode Operation
VSUPPLY (V)
2
95
90
75
85
80
70
65
4
3569 G04
6
5
3
BUCK1 ONLY
ILOAD = 270mA
ILOAD = 220mA
ILOAD = 170mA
ILOAD = 120mA
VSUPPLY (V)
2
95
90
75
85
80
70
65
4
3569 G05
6
5
3
BUCK2 ONLY
ILOAD = 210mA
ILOAD = 170mA
ILOAD = 110mA
ILOAD = 70mA
VSUPPLY (V)
2
95
90
75
85
80
70
65
4
3569 G06
6
5
3
BUCK3 ONLY
ILOAD = 210mA
ILOAD = 170mA
ILOAD = 110mA
ILOAD = 70mA
TEMPERATURE (°C)
–50
2.40
2.30
2.10
2.20
2.00
50
3569 G07
150
100
0
VIN = 5.5V
VIN = 3.5V
VIN = 2.5V
VRT = SVIN
VSUPPLY (V)
2
0.35
0.30
0.20
0.25
0.15
0.10
4
3569 G08
6
5
3
NSW1
PSW1
100°C
25°C
–50°C
VSUPPLY (V)
2
0.50
0.30
0.35
0.40
0.45
0.20
0.25
0.15
0.10
4
3569 G09
6
5
3
NSW2 & 3
PSW3 & 3
100°C
25°C
–50°C
TEMPERATURE (°C)
–50
0.3
0.2
–0.2
–0.1
0.1
0.0
–0.3
50
3569 G10
150
100
0
VREF SET TO MAX
VFB1
VFB2
VFB3
VSUPPLY (V)
2
700
400
500
600
200
300
100
0
4
3569 G11
6
5
3
ALL 3
2 BUCKS ENABLED
1 BUCK ENABLED
NO LOAD
VSUPPLY (V)
2
120
60
80
100
20
40
0
4
3569 G12
6
5
3
ALL 3
2 BUCKS ENABLED
1 BUCK ENABLED
NO LOAD
TA = 25°C, unless otherwise noted.


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