Datasheet

LTC3531/
LTC3531-3.3/LTC3531-3
6
3531fa
T
A
= 25°C unless otherwise specifi ed.
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Boost Mode Waveforms at
2.5V
IN
, 3.3V
OUT
100mA
Boost Mode Waveforms at
2.5V
IN
, 3.3V
OUT
20mA
Shorted Output
Start-Up into 50mA Load at
3.3 V
OUT
(Shows Start, Buck,
Then 4sw Modes)
3.6V
IN
, 3.3V
OUT
Load Step
200mA to 80mA
SW1 and SW2 Close-Up in Four
Switch Mode
3531 G22
3531 G23 3531 G24
3531 G19 3531 G20
3531 G21
V
OUT
1V/DIV
I
L
200mA/DIV
SW1
2V/DIV
I
L
200mA/DIV
SW2
2V/DIV
20mA LOAD
100mA LOAD
20mA LOAD
SW1
5V/DIV
SW2
5V/DIV
V
OUT
(AC)
50mV/DIV
I
L
200mA/DIV
L = 10μH
C
OUT
= 22μF
SW1
5V/DIV
SW2
5V/DIV
V
OUT
(AC)
50mV/DIV
I
L
200mA/DIV
SW1
5V/DIV
SW2
5V/DIV
V
OUT
(AC)
50mV/DIV
I
L
200mA/DIV
L = 10μH
C
OUT
= 22μF
L = 10μH
C
OUT
= 22μF
V
IN
= 5
V
OUT
(AC)
20mV/DIV
5μs/DIV 5μs/DIV
1μs/DIV 25μs/DIV
25μs/DIV 200ns/DIV
200mA/DIV
C
OUT
= 22μF V
IN
= 3.6V
V
OUT
= 3.3V