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LTC3731 Datasheet(PDF) 6 Page - Linear Technology

Part # LTC3731
Description  3-Phase, 600kHz, Synchronous Buck Switching Regulator Controller
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3731 Datasheet(HTML) 6 Page - Linear Technology

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LTC3731
3731fa
–50
0
25
50
75
–25
125
100
–50
0
255075
–25
125
100
–50
0
25
50
75
–25
125
100
PLLFLTR PIN VOLTAGE (V)
0
700
600
500
400
300
200
0.5
1
1.5
22.5
0.1
INDUCTOR CURRENT (A)
100
90
80
70
60
50
40
30
20
10
0
1
10
100
3731 G01
VIN (V)
0
100
95
90
85
80
75
70
65
60
55
50
20
3731 G02
5
10
15
25
FREQUENCY (kHz)
200
100
95
90
85
80
75
600
3731 G03
300
400
500
TEMPERATURE (°C)
–50
3731 G04
0
255075
610
605
600
595
590
–25
125
100
TEMPERATURE (°C)
4.0
4.5
5.5
6.0
3731 G05
5.0
TEMPERATURE (°C)
3731 G06
85
80
75
70
65
TEMPERATURE (°C)
700
600
500
400
300
200
100
0
3731 G07
TEMPERATURE (°C)
3731 G09
3731 G08
0
1
3
4
5
2
VIN = 8V
VOUT = 1.5V
ILOAD = 20A
VOUT = 1.5V
VFCB = OPEN
VFCB = 5V
VFCB = 0V
IL = 45A
IL = 15A
VOUT = 1.5V
f = 250kHz
VIN = 20V
VIN = 12V
VIN = 8V
VIN = 5V
VO = 1.75V
VO = 0.6V
VPLLFLTR = 2.4V
VPLLFLTR = 1.2V
VPLLFLTR = 0V
VPLLFLTR = 5V
–50
0
25
50
75
–25
125
100
TYPICAL PERFOR A CE CHARACTERISTICS
Efficiency vs IOUT (Figure 14)
Efficiency vs VIN (Figure 14)
Efficiency vs Frequency (Figure 14)
Reference Voltage vs
Temperature
Error Amplifier gm vs
Temperature
Maximum ISENSE Threshold vs
Temperature
Oscillator Frequency vs
Temperature
Operating Frequency vs VPLLFLTR
Undervoltage Reset Voltage vs
Temperature


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