Datasheet

LTC3535
4
3535fa
V
IN
(V)
1.0
0
DELAY (µs)
10
30
40
50
100
70
2.0
3.0
3.5
3535 G07
20
80
90
60
1.5
2.5
4.0
4.5
V
IN
(V)
1
0
LOAD CURRENT (mA)
5
10
15
20
25
30
1.25 1.5
3535 G08a
ENTER BURST
LEAVE BURST
V
OUT
= 1.8V
L = 4.7µH
V
IN
(V)
1
LOAD CURRENT (mA)
15
20
25
3535 G08b
10
5
0
1.25 1.5 1.75
30
35
40
2
ENTER BURST
LEAVE BURST
V
OUT
= 2.5V
L = 4.7µH
V
IN
(V)
1.0
0
LOAD CURRENT (mA)
5
15
20
25
40
35
1.5
2.0
3535 G08c
10
30
2.5
3.0
ENTER BURST
LEAVE BURST
V
OUT
= 3.3V
L = 4.7µH
V
IN
(V)
1.0
LOAD CURRENT (mA)
40
50
2.5 3.5
3535 G08d
30
20
1.5 2.0
3.0 4.0 4.5
10
0
ENTER BURST
LEAVE BURST
V
OUT
= 5V
L = 4.7µH
V
OUT
(V)
1.5
FREQUENCY CHANGE (%)
1
2
3
3.0 4.0
3535 G09
0
–1
2.0 2.5
3.5 4.5 5.0
–2
–3
NORMALIZED TO V
OUT
= 3.3V
Oscillator Frequency Change
vs V
OUT
Start-Up Delay Time vs V
IN
Burst Mode Threshold Current
vs V
IN
Burst Mode Threshold Current
vs V
IN
Burst Mode Threshold Current
vs V
IN
Burst Mode Threshold Current
vs V
IN
Efficiency vs Load Current
and V
IN
for V
OUT
= 5V
Maximum Output Current vs V
IN
Minimum Load Resistance
During Start-Up vs V
IN
LOAD CURRENT (mA)
0.01
40
EFFICIENCY (%)
POWER LOSS (mW)
50
60
70
80
0.1 1 10 100 1000
3535 G03
30
20
10
0
90
100
1
10
100
0.1
0.01
1000
V
IN
= 1.2V
V
IN
= 2.4V
V
IN
= 3.6V
V
IN
= 4.2V
POWER LOSS
EFFICIENCY
V
IN
(V)
0.5
I
OUT
(mA)
200
300
4.5
3535 G05
100
0
1.5
2.5
3.5
1.0
2.0
3.0
4.0
400
150
250
50
350
V
OUT
= 3.3V
V
OUT
= 5V
V
OUT
= 2.5V
V
OUT
= 1.8V
L = 4.7µH
V
IN
(V)
0.65
LOAD (Ω)
100
1000
10000
1.050.950.75 1.150.85
3526 G06
10
V
OUT
= 3.3V
TYPICAL PERFORMANCE CHARACTERISTICS
(Each Channel) T
A
= 25°C, unless otherwise noted.