Datasheet

LTC3539/LTC3539-2
5
35392fb
For more information www.linear.com/3539/3539-2
TEMPERATURE (°C)
V
IN
(V)
0.80
0.75
0.65
0.55
0.70
0.60
0.50
3539 G12
1mA LOAD
NO LOAD
–50 0–25 50 10025 75
TEMPERATURE (°C)
CHANGE IN V
FB
(%)
0.50
0.25
–0.25
–0.75
0
–0.50
–1.00
3539 G11
–60 –20–40 40 10080200 60
V
OUT
(V)
R
DS(ON)
(Ω)
0.30
0.25
0.15
0.05
0.20
0.10
0
3539 G09
NMOS
PMOS
1.5 2.52.0 3.5 5.55.04.53.0 4.0
TEMPERATURE (°C)
NORMALIZED R
DS(ON)
(Ω)
1.3
1.2
1.0
0.8
1.1
0.9
0.7
3539 G10
–50 –10–30 30 907010 50
Typical perForMance characTerisTics
R
DS(ON)
vs V
OUT
R
DS(ON)
Change vs Temperature V
FB
vs Temperature
Start-Up Voltage vs Temperature Fixed Frequency SW and I
L(AC)
Burst Mode SW and I
L(AC)
Load Step, Fixed Frequency Load Step, Burst Mode Operation
500ns/DIV
V
IN
= 2.4V
V
OUT
= 3.3V AT 400mA
C
OUT
= 22µF
V
OUT
20mV/DIV
AC-COUPLED
INDUCTOR
CURRENT
500mA/DIV
SW PIN
2V/DIV
3539 G13
500µs/DIV
V
IN
= 2.4V
V
OUT
= 3.3V
C
OUT
= 22µF
I
LOAD
= 100mA TO 250mA STEP
V
OUT
50mV/DIV
AC-COUPLED
LOAD
CURRENT
200mA/DIV
3539 G15
5µs/DIV
V
IN
= 3.3V
V
OUT
= 5V
C
OUT
= 22µF
V
OUT
20mV/DIV
AC-COUPLED
INDUCTOR
CURRENT
200mA/DIV
SW PIN
5V/DIV
3539 G14
500µs/DIV
V
IN
= 2.4V
V
OUT
= 3.3V
C
OUT
= 22µF
I
LOAD
= 20mA TO 170mA
V
OUT
50mV/DIV
AC-COUPLED
LOAD
CURRENT
200mA/DIV
3539 G16