LTC3828_15 Datasheet, PDF (5/32 Pages) Linear Technology – Dual, 2-Phase Step-Down Controller with Tracking

LTC3828
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C unless otherwise noted.
Supply Current vs Input Voltage
(Figure 14)
1200
1000
BOTH CONTROLLERS ON
800
600
400
200
0
0
SHUTDOWN
5 10 15 20
INPUT VOLTAGE (V)
Oscillator Frequency vs
Temperature
700
25 30
3828 G04
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
Internal 5V LDO Line Regulation
5.2
I_LOAD = 1mA
5.0
4.8
4.6
4.4
4.2
4.0
0
5 10 15 20 25 30
INPUT VOLTAGE (V)
3828 G05
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
Undervoltage Lockout
vs Temperature
3.8
3.6
3.4
3.2
3.0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3828 G06
Current Sense Pin Input Current vs
Temperature
37
35
33
31
29
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3828 G09
INTV_CC Voltage vs Temperature
5.1
5.0
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
4.7
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3828 G11
–0.4
0
1
2
3
4
5
LOAD CURRENT (A)
3828 G12
3828fc
5