ltc3730 Linear Technology Corporation, ltc3730 Datasheet - Page 5

• Manufacturer Part Number: ltc3730
• Description: 3-phase, 5-bit Intel Mobile Vid, 600khz, Synchronous Buck Controller
• Manufacturer: Linear Technology Corporation

TYPICAL PERFOR A CE CHARACTERISTICS
100
610
605
600
595
590
700
600
500
400
300
200
100
90
80
70
60
50
40
30
20
10
0
0
–50
–45
0.1
Efficiency vs I
Reference Voltage vs
Temperature
Oscillator Frequency vs
Temperature
V
V
V
V
FCB
FCB
V
PLLFLTR
PLLFLTR
PLLFLTR
–30
–30
= OPEN
= 5V
–15
V
–10
= 1.2V
FCB
= 2.4V
= 0V
LOAD CURRENT (A)
TEMPERATURE (°C)
TEMPERATURE (°C)
1
= 0V
0
10
OUT
15
30
(Figure 14)
30
50
10
V
45
PLLFLTR
V
V
70
IN
OUT
W
60
= 8V
= 1.5V
90
= 5V
3730 G01
75
3730 G07
3730 G04
U
100
110
90
100
6.0
5.5
5.0
4.0
700
600
500
400
300
200
4.5
95
90
85
80
75
70
65
60
55
50
–45
0
Efficiency vs V
Error Amplifier gm vs
Temperature
Oscillator Frequency vs V
0
–30
5
–15
0.5
I
OUT
PLLFLTR PIN VOLTAGE (V)
TEMPERATURE (°C)
I
OUT
0
= 45A
10
= 15A
1
IN
15
V
IN
(Figure 14)
(V)
30
15
1.5
45
V
f = 250kHz
OUT
PLLFLTR
60
20
2
= 1.5V
3730 G02
75
3730 G08
3730 G05
25
90
2.5
100
95
90
85
80
75
85
80
75
70
65
5
4
3
2
0
1
–45
200
–45
Efficiency vs Frequency (Figure 14)
Maximum I
Temperature
Undervoltage Reset Voltage vs
Temperature
V
–30
V
–30
V
IN
IN
IN
= 5V
= 12V
= 20V
–15
–15
300
V
TEMPERATURE (°C)
TEMPERATURE (°C)
O
FREQUENCY (kHz)
0
0
SENSE
= 1.75V
15
15
400
Threshold vs
LTC3730
V
30
30
O
= 0.6V
45
45
I
V
LOAD
500
OUT
60
60
V
= 1.5V
IN
= 20A
75
75
3730 G09
= 8V
3730 G03
3730 G06
3730fa
5
600
90
90