LTC3633A/LTC3633A-1
TYPICAL PERFORMANCE CHARACTERISTICS TJ = 25°C, VIN1 = VIN2 = 12V, fSW = 1MHz, L = 1μH
unless otherwise noted.
Internal MOSFET RDS(ON)
vs Temperature
Quiescent Current vs VIN
Burst Mode Operation
Shutdown Current vs VIN
200
180
160
140
120
100
80
900
800
700
600
500
400
300
200
100
0
24
22
20
18
16
14
12
10
8
90°C
25°C
–40°C
TOP SWITCH
60
BOTTOM SWITCH
6
40
4
20
2
0
0
–50 –25
0
25
50
75 100 125
4
6
8
10 12 14 16 18 20
(V)
4
6
8
10 12 14 16 18 20
(V)
TEMPERATURE (°C)
V
V
IN
IN
3633a G10
3633a G11
3633a G12
Valley Current Limit
vs Temperature
TRACKSS Pull-Up Current
vs Temperature
Switch Leakage vs Temperature
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
0
3.9
3.8
3.7
3.6
3.5
3.4
3.3
2.0
1.8
SYNCHRONOUS SWITCH
MAIN SWITCH
1.6
1.4
1.2
1.0
0.8
0.6
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
–50 –25
0
25
50
75 100 125
–50
25
50
75
100 125
–25
0
TEMPERATURE (°C)
TEMPERATURE (°C)
3633a G13
3633a G14
3633a G15
V2P5 Load Regulation
Burst Mode Operation
Load Step
2.506
2.504
2.502
2.500
2.498
2.496
2.494
V
OUT
SW
AC-COUPLED
100mV/DIV
10V/DIV
V
OUT
50mV/DIV
I
L
2A/DIV
I
L
1A/DIV
3633a G17
3633a G18
20μs/DIV
= 100mA to 3A
= 220pF
= 13kΩ
5μs/DIV
V
I
ITH
R
= 1.8V
V
I
= 1.8V
= 100mA
OUT
LOAD
OUT
LOAD
C
0
2
4
I
6
(mA)
8
10
ITH
LOAD
3633a G16
3633a1f
6
Linear [ Linear ]
