LTC3816_15 Datasheet, PDF (9/44 Pages) Linear Technology – Single-Phase Wide VIN Range DC/DC Controller for Intel IMVP-6/IMVP-6.5 CPUs

Typical Performance Characteristics
LTC3816
Duty Cycle vs V_COMP without Line
Feedforward
100
90
V_IN = 12V
f_OSC = 400kHz
80 ^{LFF = 0V}
70
60
50
40
30
20
10
0
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4
V_COMP (V)
3816 G25
f_OSC vs Temperature
700
600
V_RFREQ = 2.5V
500
RFREQ FLOATS
400
300
V_RFREQ = 0V
200
100
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3816 G26
V_RPTC vs Temperature
480
120
475
115
V_RPTC POSITIVE THRESHOLD
470
110
465
105
V_RPTC NEGATIVE THRESHOLD
460
100
455
95
450
–50 –25
0 25 50 75
TEMPERATURE (°C)
90
100 125
3816 G27
I_IMAX, I_RFREQ and I_RPTC
vs Temperature
11.50
105.0
11.25
11.00
I_RPTC
102.5
100.0
10.75
97.5
10.50
95.0
10.25
I_RFREQ, I_IMAX
92.5
10.00
90.0
9.75
87.5
9.50
–50 –25
0 25 50 75
TEMPERATURE (°C)
85.0
100 125
3816 G28
VR_ON vs Temperature
1.4
1.3
VR_ON RAMPS HIGH,
REGULATOR ON THRESHOLD
1.2
VR_ON RAMPS LOW,
1.1
REGULATOR OFF THRESHOLD
1.0
0.9
VR_ON RAMPS HIGH,
POWER-UP THRESHOLD
0.8
0.7
0.6
VR_ON RAMPS LOW,
POWER-DOWN THRESHOLD
0.5
–50 –25 0 25 50 75 100 125
TEMPERATURE (°C)
3816 G29
INTV_CC UVLO vs Temperature
4.1
V_EXTVCC = 0V
4.0
V_IN RAMPS HIGH
3.9
3.8
3.7
3.6
V_IN RAMPS LOW
3.5
3.4
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3816 G30
INTV_CC Line Regulation
5.4
V_EXTVCC = 0V
5.2
5.0
4.8
4.6
4.4
4.2
INTV_CC Load Regulation
0
0
V_EXTVCC = 0V
f_OSC = 400kHz
–10
–300
–20
V_IN = 12V –600
V_IN = 5V
–30
–900
INTV_CC Dropout vs Temperature
0
V_EXTVCC = 0V
f_OSC = 400kHz
–0.2
LOAD CURRENT = 20mA
∆INTV_CC = –1%
–0.4
–0.6
–0.8
4.0
0 5 10 15 20 25 30 35 40
–40
0
–1200
10
20
30
40
50
–1.0
–50 –25 0 25 50 75 100 125
V_IN (V)
I_LOAD (mA)
TEMPERATURE (°C)
3816 G31
3816 G32
3816 G33
3816f