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LTC3730_15 Datasheet, PDF (5/28 Pages) Linear Technology – 3-Phase, 5-Bit Intel Mobile VID, 600kHz, Synchronous Buck Controller
TYPICAL PERFOR A CE CHARACTERISTICS
Efficiency vs IOUT (Figure 14)
100
90 VFCB = OPEN
80 VFCB = 5V
70
VFCB = 0V
60
50
40
30
20
10
0
0.1
VIN = 8V
VOUT = 1.5V
1
10
LOAD CURRENT (A)
100
3730 G01
Reference Voltage vs
Temperature
610
Efficiency vs VIN (Figure 14)
100
VOUT = 1.5V
95
IOUT = 15A
f = 250kHz
90
85
IOUT = 45A
80
75
70
65
60
55
50
0
5
10
15
20
25
VIN (V)
3730 G02
Error Amplifier gm vs
Temperature
6.0
LTC3730
Efficiency vs Frequency (Figure 14)
100
95
VIN = 5V
ILOAD = 20A
VOUT = 1.5V
90
VIN = 12V
85
VIN = 8V
VIN = 20V
80
75
200
300
400
500
FREQUENCY (kHz)
600
3730 G03
Maximum ISENSE Threshold vs
Temperature
85
605
5.5
80
VO = 1.75V
600
5.0
75
VO = 0.6V
595
4.5
70
590
–50 –30 –10 10 30 50 70
TEMPERATURE (°C)
90 110
3730 G04
Oscillator Frequency vs
Temperature
700
600 VPLLFLTR = 2.4V
500
VPLLFLTR = 5V
400
VPLLFLTR = 1.2V
300
200 VPLLFLTR = 0V
100
0
–45 –30 –15 0 15 30 45 60
TEMPERATURE (°C)
75 90
3730 G07
4.0
–45 –30 –15 0 15 30 45 60 75 90
TEMPERATURE (°C)
3730 G05
Oscillator Frequency vs VPLLFLTR
700
600
500
400
300
200
0
0.5
1
1.5
2
2.5
PLLFLTR PIN VOLTAGE (V)
3730 G08
65
–45 –30 –15 0 15 30 45 60 75 90
TEMPERATURE (°C)
3730 G06
Undervoltage Reset Voltage vs
Temperature
5
4
3
2
1
0
–45 –30 –15 0 15 30 45 60
TEMPERATURE (°C)
75 90
3730 G09
3730fa
5