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LTC3735 Datasheet, PDF (5/32 Pages) Linear Technology – 2-Phase, High Efficiency DC/DC Controller for Intel Mobile CPUs
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TYPICAL PERFORMANCE CHARACTERISTICS
LTC3735
Active Mode Efficiency
(Figure 14)
100
VID = 1.468V
PSI = 0
VIN = 7.5V
90
VIN = 20V
80
70
60
0
5 10 15 20 25 30
LOAD CURRENT (A)
3735 G01
Supply Current vs PVCC Voltage
and Mode
2500
ON
2000
1500
1000
500
0
4
SHUTDOWN
5
6
PVCC VOLTAGE (V)
7
3735 G04
Maximum Current Sense
Threshold vs VRUN/SS (Soft-Start)
80
VSENSE(CM) = 1.25V
70
60
50
40
30
20
10
0
0
1
2
3
4
5
VRUN/SS (V)
3735 G07
Deeper Sleep Mode Efficiency
(Figure 14)
90
PSI = 0
80
VIN = 7.5V
VIN = 20V
70
60
0.01
0.1
1
LOAD CURRENT (A)
10
3735 G02
Maximum Current Sense
Threshold vs Duty Factor
75
50
25
0
0
20
40
60
80
100
DUTY FACTOR (%)
3735 G05
Maximum Current Sense Threshold
vs Sense Common Mode Voltage
76
72
68
64
60
0
1
2
3
4
5
COMMON MODE VOLTAGE (V)
3735 G08
Efficiency vs Input Voltage
(Figure 14)
100
IOUT = 20A
VOUT = 1.6V
90
80
70
60
50
5
10
15
20
INPUT VOLTAGE (V)
3735 G03
Maximum Current Sense
Threshold vs Percent of Nominal
Output Voltage (Foldback)
80
70
60
50
40
30
20
10
0
0
25
50
75
100
PERCENT OF NOMINAL OUTPUT VOLTAGE (%)
3735 G06
Current Sense Threshold
vs ITH Voltage
90
80
70
60
50
40
30
20
10
0
–10
–20
–30
0
0.5
1
1.5
2
2.5
VITH (V)
3735 G09
3735fa
5
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