Datasheet

LTC3535
5
3535fa
TYPICAL PERFORMANCE CHARACTERISTICS
(Each Channel) T
A
= 25°C, unless otherwise noted.
–50 –30 –10 10 30 50 70 90
TEMPERATURE (°C)
NORMALIZED R
DS(ON)
1.0
1.1
1.2
3535 G12
0.8
0.7
1.3
0.9
NORMALIZED TO 25°C
R
DS(ON)
vs V
OUT
Oscillator Frequency Change
vs Temperature
R
DS(ON)
Change vs Temperature
V
OUT
(V)
1.5
R
DS(ON)
(Ω)
0.50
0.45
0.80
0.85
0.90
2.5
3.5
4.0
3535 G10
0.35
0.70
0.60
0.40
0.75
0.30
0.65
0.55
2.0
3.0
4.5
5.0
PMOS
NMOS
–50 –30 –10 10 30 50 70 90
TEMPERATURE (°C)
FREQUECNY CHANGE (%)
4
6
8
3535 G11
0
–10
–8
–6
10
2
–2
–4
NORMALIZED TO 25°C
TEMPERATURE (°C)
–50
0.50
V
IN
(V)
0.55
0.60
0.65
0.70
0.80
25
0 25 50
3526 G14
75 100
0.75
1mA LOAD
NO LOAD
V
FB
vs Temperature
Start-Up Voltage vs Temperature
Burst Mode Quiescent Current
vs V
OUT
TEMPERATURE (°C)
–60
–1.00
CHANGE IN V
FB
(%)
–0.75
–0.50
–0.25
0
–20 20
60
100
3535 G13
0.25
0.50
–40 0
40
80
NORMALIZED TO 25°C
V
OUT
(V)
1.5
10.0
9.5
9.0
8.5
8.0
7.5
7.0
3.0 4.0 4.5
3535 G15
2.0 2.5
3.5 5.0
I
Q
(µA)
MEASURED ON V
OUT
Fixed Frequency Switching
Waveform and V
OUT
Ripple
Burst Mode Waveforms
V
OUT
and I
IN
During Soft-Start
SW PIN
2V/DIV
500ns/DIVV
IN
= 1.2V
V
OUT
= 3.3V AT 100mA
C
OUT
= 10µF
3535 G16
V
OUT
10mV/DIV
AC-COUPLED
SW PIN
2V/DIV
INDUCTOR
CURRENT
0.2A/DIV
10µs/DIVV
IN
= 1.2V
V
OUT
= 3.3V
C
OUT
= 10µF
3535 G17
V
OUT
20mV/DIV
AC-COUPLED
SHDN PIN
1V/DIV
INPUT
CURRENT
0.2A/DIV
200µs/DIVV
OUT
= 3.3V
C
OUT
= 10µF
3535 G18
V
OUT
1V/DIV