Datasheet

LTC3824
4
3824fg
Typical perForMance characTerisTics
(V
CC
-V
CAP
) vs I
GATE
at V
DRIVE
Low I
CC
vs V
CC
Switching Frequency Change
vs V
CC
at R
SET
= 392kΩ
V
REF
Change vs V
CC
Switching Frequency vs R
SET
∆V
REF
vs Temperature
T
A
= 25°C unless otherwise noted.
I
GATE
(mA)
0 10
V
CC
-V
CAP
(V)
8.5
8.4
8.3
8.2
8.1
3824 G01
8.0
7.9
7.8
7.7
7.6
20 30 40
50
V
CC
(V)
0
0
I
CC
(mA)
1
2
3
10
20 30 40
3824 G02
50 60
V
FB
= 0.75V
V
FB
= 0.85V
V
CC
(V)
0
–3
ΔFREQUENCY (kHz)
–2
–1
0
1
3
10
20 30 40
3824 G03
50 60
2
V
CC
(V)
0
–0.4
ΔV
REF
(mV)
–0.2
0
0.2
0.4
10 20 30 40
3824 G04
50 60
DIE TEMPERATURE (°C)
–75 –50
–2
∆V
REF
(mV)
–1
0
1
5
4
3
2
–25 0 25 50
3824 G06
75 100 150125
Note 3: This parameter is tested in a feedback loop that servos V
FB
to the
reference voltage with the V
C
pin forced to 1V.
Note 4: This specification represents the maximum voltage on V
C
where
switching (GATE pin) is guaranteed to be off. The nominal value of V
C
where switching turns off is 0.7V.
Note 5: The LTC3824 typically enters Burst Mode operation when the load
is less than one third the current limit. If minimum on-time is violated,
cycle skipping may occur at higher current levels.
elecTrical characTerisTics
R
SET
(kΩ)
100
100
FREQUENCY (kHz)
200
300
400
500
700
200 300
3824 G05
400
600