Datasheet

LTC3605
5
3605fc
Switch Leakage vs V
IN
Efficiency vs V
IN
Frequency vs V
ON
Voltage
Current Limit Foldback
INTV
CC
Load Regulation
RUN Pin Threshold vs Temperature
DCM Operation
V
IN
(V)
0
250
300
350
16
3605 G10
200
150
4 8 12 20
100
50
0
SWITCH LEAKAGE (nA)
BOTTOM SWITCH
TOP SWITCH
V
IN
(V)
0
EFFICIENCY (%)
88
90
92
9 12
3605 G11
86
84
3 6 15
94
96
98
I
LOAD
= 1A
V
OUT
= 3.3V
I
LOAD
= 5A
V
ON
(V)
0
FREQUENCY (MHz)
1.4
6
3605 G12
0.8
0.4
2 4 8
0.2
0
1.6
1.2
1.0
0.6
10 12 14
V
IN
= 14V
R
T
= 162k
V
FB
(V)
0
NORMALIZED MAXIMUM OUTPUT CURRENT (%)
80
100
120
0.3 0.5
3605 G13
60
40
0.1 0.2
0.4 0.6 0.7
20
0
INTV
CC
OUTPUT CURRENT (mA)
0
NORMALIZED INTV
CC
(%)
93
99
100
101
40
80
100
3605 G14
91
97
95
92
98
90
96
94
20
60
120
140
T
A
= 25°C
TEMPERATURE (°C)
–40
RUN THRESHOLD (V)
1.20
1.25
1.30
35 85
3605 G15
1.15
1.10
–15 10
60 110
1.05
1.00
CCM Operation
CLKOUT
2V/DIV
V
SW
5V/DIV
I
L
2A/DIV
V
IN
= 12V
V
OUT
= 1.2V
MODE = 0
I
OUT
= 0
L1 = 0.33µH
400ns/DIV
3605 G16
CLKOUT
2V/DIV
V
SW
5V/DIV
I
L
2A/DIV
V
IN
= 12V
V
OUT
= 1.2V
MODE = 3.3V
PHMODE = 3.3V
I
OUT
= 0
L1 = 0.33µH
400ns/DIV
3605 G17
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C unless otherwise specified.