Datasheet

LTC3728L/LTC3728LX
8
3728lxff
Typical perForMance characTerisTics
Soft-Start Up (Figure 13) Load Step (Figure 13) Load Step (Figure 13)
Input Source/Capacitor
Instantaneous Current (Figure 13) Burst Mode Operation (Figure 13)
Constant-Frequency (Burst Inhibit)
Operation (Figure 13)
3728L G19
V
OUT
5V/DIV
V
RUN/SS
5V/DIV
I
L
2A/DIV
5ms/DIVV
IN
= 15V
V
OUT
= 5V
3728L G20
V
OUT
200mV/DIV
I
L
2A/DIV
20µs/DIVV
IN
= 15V
V
OUT
= 5V
V
PLLFLTR
= 0V
LOAD STEP = 0A TO 3A
Burst Mode OPERATION
3728L G21
V
OUT
200mV/DIV
I
L
2A/DIV
20µs/DIVV
IN
= 15V
V
OUT
= 5V
V
PLLFLTR
= 0V
LOAD STEP = 0A TO 3A
CONTINUOUS MODE
3728L G22
V
IN
200mV/DIV
V
SW1
10V/DIV
V
SW2
10V/DIV
I
IN
2A/DIV
1µs/DIVV
IN
= 15V
V
OUT1
= 5V, V
OUT2
= 3.3V
V
PLLFLTR
= 0V
I
OUT5
= I
OUT3.3
= 2A
3728L G23
V
OUT
20mV/DIV
I
L
0.5A/DIV
10µs/DIVV
IN
= 15V
V
OUT
= 5V
V
PLLFLTR
= 0V
V
FCB
= OPEN
I
OUT
= 20mA
3728L G24
V
OUT
20mV/DIV
I
L
0.5A/DIV
2µs/DIVV
IN
= 15V
V
OUT
= 5V
V
PLLFLTR
= 0V
V
FCB
= 5V
I
OUT
= 20mA