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LTC3370 Datasheet(PDF) 10 Page - Analog Devices

Part # LTC3370
Description  20V, 4-Channel Buck DC/DC with 8x Configurable 1.5A Power Stages
PDF  28 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LTC3370 Datasheet(HTML) 10 Page - Analog Devices

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LTC3376
10
Rev 0
For more information www.analog.com
TYPICAL PERFORMANCE CHARACTERISTICS
6A Buck Efficiency vs ILOAD,
VOUT=3.3V
1.5A Buck Efficiency vs Frequency
(Forced Continuous Mode)
1.5A Buck Efficiency vs Frequency
(Forced Continuous Mode)
1.5A Buck Regulator Load
Regulation (Forced Continuous
Mode)
1.5A Buck Regulator Line
Regulation (Forced Continuous
Mode)
1.5 Buck Current Limit vs Duty
Cycle
TA = 25°C, unless otherwise noted.
FORCED CONTINUOUS MODE
fOSC = 2MHz
L DCR = 3.0mΩ
L = 1.1µH
OPERATION
Burst Mode
EXTVCC = 3.3V
VIN = 5V
VIN = 12V
VIN = 20V
VIN = 5V
VIN = 12V
VIN = 20V
LOAD CURRENT (A)
1m
10m
100m
1
6
0
10
20
30
40
50
60
70
80
90
100
VOUT = 3.3V
6A Buck Efficiency vs ILOAD,
3376 G28
VOUT = 3.3V
ILOAD = 0.5A
L = 6.5µH
EXTVCC = 3.3V
VIN = 5V
VIN = 12V
FREQUENCY (MHz)
1
1.5
2
2.5
3
50
55
60
65
70
75
80
85
90
95
100
(Forced Continuous Mode)
1.5A Buck Efficiency vs Frequency
3376 G29
VOUT = 3.3V
VIN = 12V
L = 6.5µH
EXTVCC = 3.3V
ILOAD = 0.8A
ILOAD = 0.2A
ILOAD = 0.05A
FREQUENCY (MHz)
1
1.5
2
2.5
3
50
55
60
65
70
75
80
85
90
95
100
(Forced Continuous Mode)
1.5A Buck Efficiency vs Frequency
3376 G30
fOSC = 2MHz
L = 4.7µH
VIN = 5V
VIN = 12V
VIN = 20V
LOAD CURRENT (A)
1m
10m
100m
1 2
3.290
3.292
3.294
3.296
3.298
3.300
3.302
3.304
3.306
3.308
3.310
Mode)
Regulation (Forced Continuous
1.5A Buck Regulator Load
3376 G31
fOSC = 2MHz
L = 4.7µH
Due to minimum
off–time
ILOAD = 1mA
ILOAD = 750mA
VIN (V)
4
6
8
10
12
14
16
18
20
3.220
3.230
3.240
3.250
3.260
3.270
3.280
3.290
3.300
3.310
Mode)
Regulation (Forced Continuous
1.5A Buck Regulator Line
3376 G32
VOUT = 3.3V
fOSC = 2MHz
L = 4.7µH
DUTY CYCLE (%)
20 26 32 38 44 50 56 62 68 74 80
2.00
2.10
2.20
2.30
2.40
2.50
2.60
2.70
2.80
2.90
3.00
vs Duty Cycle
1.5A Buck Current Limit
3376 G33



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