Datasheet

LTC3816
8
3816f
Typical perForMance characTerisTics
Momentary Overcurrent,
45µs I
MAX
Pulse
Start-Up to V
BOOT
V
BOOT
to PWRGD Delay VR
ON
Shutdown
V
CC(CORE)
200mV/DIV
CLKEN#
5V/DIV
PWRGD
5V/DIV
VR
ON
5V/DIV
100µs/DIV
3816 G16
V
IN
= 12V
IMVP6 CONFIGURATION
C
SS
= 470pF
VID = 0.75V
NO LOAD
V
CC(CORE)
200mV/DIV
CLKEN#
5V/DIV
PWRGD
5V/DIV
VR
ON
5V/DIV
2ms/DIV
3816 G17
V
IN
= 12V
IMVP6 CONFIGURATION
C
SS
= 470pF
VID = 0.75V
NO LOAD
V
CC(CORE)
200mV/DIV
CLKEN#
5V/DIV
PWRGD
5V/DIV
VR
ON
5V/DIV
10µs/DIV
3816 G18
V
IN
= 12V
VID = 0.75V
NO LOAD
Momentary Overcurrent,
90µs I
MAX
Pulse
V
CC(CORE)
100mV/DIV
20µs I
LOAD
10A/DIV
I
L
10A/DIV
V
RIMAX
20mV/DIV
10µs/DIV
3816 G19
V
IN
= 12V
V
CC(CORE)
= 1V
R
IMAX
= 1.5k
R
SENSE
= 1mΩ
FORCED CONTINUOUS MODE
V
CC(CORE)
100mV/DIV
60µs I
LOAD
10A/DIV
I
L
10A/DIV
V
RIMAX
20mV/DIV
20µs/DIV
3816 G20
V
IN
= 12V
V
CC(CORE)
= 1V
R
IMAX
= 1.5k
R
SENSE
= 1mΩ
FORCED CONTINUOUS MODE
2x Overcurrent
V
CC(CORE)
100mV/DIV
20µs I
LOAD
20A/DIV
I
L
20A/DIV
V
RIMAX
20mV/DIV
10µs/DIV
3816 G21
V
IN
= 12V
V
CC(CORE)
= 1V
R
IMAX
= 1.5k
R
SENSE
= 1mΩ
FORCED CONTINUOUS MODE
Current Comparator Offset
vs Common Mode Range
Duty Cycle vs V
COMP
with Line
Feedforward
V
ISENN
(V)
0
V
ISENP
– V
IMAX
(mV)
–0.5
0
0.5
0.75
1.25
3816 G22
–1.0
–1.5
–2.0
0.25 0.5 1
1.0
1.5
2.0
1.5
V
IN
= 12V
V
IMAX
– V
ISENN
= 20mV
Current Comparator Offset
vs Temperature
V
COMP
(V)
1.0
0
DUTY CYCLE (%)
10
30
40
50
100
70
1.4
1.8
2.0
3816 G24
20
80
90
60
1.2
1.6
2.2
2.4
V
IN
= 5V
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
f
OSC
= 400kHz
LFF = FLOAT
TEMPERATURE (°C)
–50
V
ISENP
– V
IMAX
(mV)
1.5
25
3816 G23
0
–1.0
–25 0 50
–1.5
–2.0
2.0
1.0
0.5
–0.5
75 100 125
V
IN
= 12V
V
ISENN
= 1V
V
IMAX
– V
ISENN
= 20mV