LTC3404 LINER [Linear Technology], LTC3404 Datasheet - Page 5

• Manufacturer Part Number: LTC3404
• Description: 1.4MHz High Efficiency Monolithic Synchronous Step-Down Regulator
• Manufacturer: LINER [Linear Technology]

100mV/DIV
500mA/DIV
200mA/DIV
TYPICAL PERFOR A CE CHARACTERISTICS
50mV/DIV
COUPLED
450
400
350
300
250
200
150
100
5V/DIV
1V/DIV
50
V
V
0
–50
OUT
OUT
SW
I
AC
TH
DC Supply Current
vs Temperature
I
I
V
V
L
L
IN
OUT
Burst Mode Operation
V
V
L = 4.7 H
Load Step Response
V
V
L = 4.7 H
= 3.6V
IN
OUT
IN
OUT
–25
= 1.5V
= 4.2V
= 3.6V
= 1.5V
= 1.5V
0
TEMPERATURE ( C)
C
C
I
C
C
I
PULSE SKIPPING MODE
PULSE SKIPPING
LOAD
LOAD
25
IN
OUT
IN
OUT
OPERATION
Burst Mode
= 10 F
= 10 F
10 s/DIV
40 s/DIV
= 22 F
= 22 F
MODE
= 30mA
= 200mA TO 500mA
50
75
W
100
3404 G12
U
3404 G14
3404 G17
125
100mA/DIV
100mV/DIV
500mA/DIV
10mV/DIV
5V/DIV
1V/DIV
V
V
2.5
2.0
1.5
1.0
0.5
OUT
OUT
SW
I
0
TH
– 50
I
I
L
L
Switch Leakage vs Temperature
Load Step Response
V
RUN = 0V
V
V
L = 4.7 H
V
V
L = 4.7 H
Pulse Skipping Mode Operation
IN
OUT
IN
OUT
IN
– 25
= 4.2V
= 7V
= 3.6V
= 1.5V
= 1.5V
0
TEMPERATURE ( C)
C
C
I
C
C
I
PULSE SKIPPING MODE
LOAD
LOAD
IN
OUT
IN
OUT
25
= 10 F
= 10 F
500ns/DIV
40 s/DIV
SYNCHRONOUS
= 22 F
= 22 F
= 30mA
= 50mA TO 500mA
50
SWITCH
75
SWITCH
MAIN
100
3404 G13
3404 G15
3404 G18
125
500mA/DIV
100mV/DIV
500mA/DIV
2V/DIV
1V/DIV
1V/DIV
V
V
RUN
OUT
OUT
0.6
I
1.2
1.0
0.8
0.2
0.4
TH
I
I
0
L
L
Switch Leakage vs Input Voltage
0
V
V
L = 4.7 H
V
V
L = 4.7 H
Start-Up from Shutdown
Load Step Response
IN
OUT
RUN = 0V
IN
OUT
= 3.6V
= 3.6V
= 1.5V
= 1.5V
1
2
SYNCHRONOUS
INPUT VOLTAGE (V)
C
C
I
C
C
I
Burst Mode OPERATION
LOAD
LOAD
IN
OUT
IN
OUT
3
= 10 F
= 10 F
40 s/DIV
40 s/DIV
= 22 F
= 22 F
= 500mA
= 50mA TO 500mA
SWITCH
4
LTC3404
SWITCH
MAIN
5
6
7
3404 G16
3404 G20
3404 G19
5
8