Datasheet

LTC3633
6
3633fc
For more information www.linear.com/LTC3633
Typical perForMance characTerisTics
Burst Mode Operation
Internal MOSFET R
DS(ON)
vs Temperature
Quiescent Current vs V
IN
Burst Mode Operation
Switch Leakage vs Temperature
Valley Current Limit
vs Temperature
Track Pull-Up Current
vs Temperature
Shutdown Current vs V
IN
V2P5 Load Regulation Load Step
4
I
Q
(µA)
100
200
300
500
8
16
3633 G11
0
600
800
700
400
6 10 12 14
T
A
= 90°C
T
A
= 25°C
T
A
= –40°C
V
IN
(V)
4
I
Q
(µA)
2
4
6
10
8
16
3633 G12
0
12
20
16
18
14
8
6 10 12 14
V
IN
(V)
–50
LEAKAGE CURRENT (nA)
1000
2000
3000
5000
0
125100
3633 G13
0
6000
7000
4000
–25 25 50 75
TEMPERATURE (°C)
MAIN SWITCH
SYNCHRONOUS SWITCH
T
J
= 25°C, V
IN
= 12V, f
SW
= 1MHz, L = 1µH unless
otherwise noted.
TEMPERATURE (°C)
–50
1.4
1.6
2.0
25 75
3633 G15
1.2
1.0
–25 0
50 100 125
0.8
0.6
1.8
I
TRACK
(µA)
–50
I
LIM
(A)
3.4
3.5
50
3633 G14
3.3
3.7
3.6
3.9
3.8
25–25 0 75 100 125
TEMPERATURE (°C)
0
V2P5(V)
2.496
2.498
6
3633 G16
2.494
2.502
2.500
2.494
2.506
2.504
42 8 10
I
LOAD
(mA)
I
L
1A/DIV
SW
10V/DIV
5µs/DIV
3633 G17
V
OUT
50mV/DIV
V
OUT
= 1.8V
I
LOAD
= 100mA
I
L
2A/DIV
20µs/DIV
3633 G18
V
OUT
AC-COUPLED
100mV/DIV
V
OUT
= 1.8V
I
LOAD
= 100mA to 3A
C
ITH
= 220pF
R
ITH
= 13kΩ
–50
R
DS(ON)
(mΩ)
20
40
60
80
100
120
140
25
125
3633 G10
0
160
0–25 50 75 100
TEMPERATURE (°C)
TOP SWITCH
BOTTOM SWITCH