LTC3811_15 Datasheet, PDF (8/48 Pages) Linear Technology – High Speed Dual, Multiphase Step-Down DC/DC Controller

LTC3811
TYPICAL PERFORMANCE CHARACTERISTICS
DRV_CC Line Regulation
6.010
6.008
6.006
6.004
6.002
6.000
5.998
5.996
5.994
5.992
5.990
04
8 12 16 20 24 28 32 36
SUPPLY VOLTAGE (V)
3811 G19
DRV_CC Undervoltage Lockout
Thresholds vs Temperature
5.0
4.5
4.0
DRV_CC RISING
3.5
3.0
DRV_CC FALLING
2.5
2.0
1.5
1.0
0.5
0
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3811 G22
EXTV_CC Switch IR Drop vs Current
500
T_A = 25°C
450
400
350
300
250
200
150
100
50
0
0 10 20 30 40 50 60 70 80 90 100
EXTV_CC CURRENT (mA)
3811 G25
DRV_CC Load Regulation
6.1
6.0
5.9
5.8
5.7
5.6
5.5
5.4
0
50 100 150 200 250 300 350
DRV_CC LOAD CURRENT (mA)
3811 G20
LDO Dropout Voltage vs Current
700 _{TA = 25°C}
600
500
400
300
200
100
0
0 10 20 30 40 50 60 70 80 90 100
CURRENT (mA)
3811 G23
RUN Pin Threshold vs
Supply Voltage
2.5
2.0
1.5
25°C
–40°C
1.0
85°C
0.5
0
0 4 8 12 16 20 24 28 32 36
SUPPLY VOLTAGE (V)
3811 G26
DRV_CC vs Temperature
6.5
6.4
6.3
6.2
6.1
6.0
5.9
5.8
5.7
5.6
5.5
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3811 G21
EXTV_CC Thresholds vs
Temperature
5.0
EXTV_CC RISING
4.5
4.0
EXTV_CC FALLING
3.5
3.0
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3811 G24
Current Sense Amplifier g_m
vs Temperature
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3811 G27
3811f
8