LTC3828 Datasheet, PDF (5/32 Pages) Linear Technology – Dual 2-Phase Step-Down Controller with Tracking

LTC3828
TYPICAL PERFOR A CE CHARACTERISTICS T_A = 25°C unless otherwise noted.
Oscillator Frequency vs
Temperature
700
600
V_PLLFLTR = 2.4V
500
V_PLLFLTR = 1.2V
400
300
V_PLLFLTR = 0V
200
100
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3828 G07
Maximum Current Sense
Threshold vs Temperature
80
V_OUT = 5V
78
76
74
72
TRCKSS Current vs Temperature
1.5
1.3
1.1
0.9
0.7
0.5
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3828 G08
INTV_CC Voltage vs Temperature
5.1
5.0
Current Sense Pin Input Current vs
Temperature
37
35
33
31
29
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3828 G09
Load Regulation
0
– 0.1
FCB = 0V
V_IN = 15V
FIGURE 14
4.9
– 0.2
4.8
– 0.3
70
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3828 G10
Maximum Current Sense
Threshold vs Duty Factor
75
50
25
0
0
20 40
60
80 100
DUTY FACTOR (%)
3828 G13
4.7
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3828 G11
Maximum Current Sense
Threshold vs Percent of Nominal
Output Voltage (Foldback)
80
70
60
50
40
30
20
10
0
0
0.25
0.5
0.75
1.0
PERCENT ON NOMINAL OUTPUT VOLTAGE (%)
3828 G14
– 0.4
0
1
2
3
4
5
LOAD CURRENT (A)
3828 G12
Maximum Current Sense
Threshold vs Sense Common
Mode Voltage
80
75
70
65
60
0
1
2
3
4
5
COMM0N MODE VOLTAGE (V)
3828 G15
3828f
5