LTC3816_15 Datasheet, PDF (8/44 Pages) Linear Technology – Single-Phase Wide VIN Range DC/DC Controller for Intel IMVP-6/IMVP-6.5 CPUs

LTC3816
Typical Performance Characteristics
Start-Up to V_BOOT
V_BOOT to PWRGD Delay
VR_ON Shutdown
V_CC(CORE)
200mV/DIV
V_CC(CORE)
200mV/DIV
V_CC(CORE)
200mV/DIV
CLKEN#
5V/DIV
PWRGD
5V/DIV
VR_ON
5V/DIV
V_IN = 12V
100µs/DIV
IMVP6 CONFIGURATION
C_SS = 470pF
VID = 0.75V
NO LOAD
Momentary Overcurrent,
45µs I_MAX Pulse
V_CC(CORE)
100mV/DIV
20µs I_LOAD
10A/DIV
I_L
10A/DIV
V_RIMAX
20mV/DIV
CLKEN#
5V/DIV
PWRGD
5V/DIV
3816 G16
VR_ON
5V/DIV
V_IN = 12V
2ms/DIV
IMVP6 CONFIGURATION
C_SS = 470pF
VID = 0.75V
NO LOAD
Momentary Overcurrent,
90µs I_MAX Pulse
V_CC(CORE)
100mV/DIV
60µs I_LOAD
10A/DIV
I_L
10A/DIV
V_RIMAX
20mV/DIV
3816 G17
CLKEN#
5V/DIV
PWRGD
5V/DIV
VR_ON
5V/DIV
V_IN = 12V
VID = 0.75V
NO LOAD
10µs/DIV
2x Overcurrent
V_CC(CORE)
100mV/DIV
20µs I_LOAD
20A/DIV
I_L
20A/DIV
V_RIMAX
20mV/DIV
3816 G18
V_IN = 12V
10µs/DIV
V_CC(CORE) = 1V
R_IMAX = 1.5k
R_SENSE = 1mΩ
FORCED CONTINUOUS MODE
3816 G19
Current Comparator Offset
vs Common Mode Range
2.0
V_IN = 12V
1.5 ^VIMAX ^{– V}ISENN ^{= 20mV}
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
0
0.25 0.5 0.75 1
V_ISENN (V)
1.25 1.5
3816 G22

V_IN = 12V
20µs/DIV
V_CC(CORE) = 1V
R_IMAX = 1.5k
R_SENSE = 1mΩ
FORCED CONTINUOUS MODE
3816 G20
Current Comparator Offset
vs Temperature
2.0
V_IN = 12V
1.5 ^VISENN ^{= 1V}
V_IMAX – V_ISENN = 20mV
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3816 G23
V_IN = 12V
10µs/DIV
V_CC(CORE) = 1V
R_IMAX = 1.5k
R_SENSE = 1mΩ
FORCED CONTINUOUS MODE
3816 G21
Duty Cycle vs V_COMP with Line
Feedforward
100
90
80
70
60
50
40
f_OSC = 400kHz
30
LFF = FLOAT
20
V_IN = 5V
V_IN = 12V
10
V_IN = 24V
V_IN = 36V
0
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4
V_COMP (V)
3816 G24
3816f