LTC3405A-1.5 LINER [Linear Technology], LTC3405A-1.5 Datasheet - Page 4

• Manufacturer Part Number: LTC3405A-1.5
• Description: 1.5V, 1.8V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT
• Manufacturer: LINER [Linear Technology]

LTC3405A-1.5/LTC3405A-1.8
(From Figure 1a)
TYPICAL PERFOR A CE CHARACTERISTICS
4
1000
1800
1600
1400
1200
800
400
600
200
60
50
40
30
20
10
0
0
2
Switch Leakage vs Input Voltage
0
Dynamic Supply Current
vs Supply Voltage
RUN = 0V
2.5
1
BURST MODE OPERATION
200mA/DIV
SUPPLY VOLTAGE (V)
3
SYNCHRONOUS
INPUT VOLTAGE (V)
MAIN SWITCH
2
2V/DIV
1V/DIV
SWITCH
V
RUN
3.5
OUT
I
L
PULSE SKIPPING MODE
3
Start-Up from Shutdown
V
V
I
LOAD =
IN
OUT
4
= 3.6V
= 1.8V
4
250mA
4.5
V
I
W
LOAD
OUT
3405A1518 G12
5
5
= 1.8V
3405F G15
= 0A
100 s/DIV
U
5.5
6
AC COUPLED
100mV/DIV
100mA/DIV
5V/DIV
V
340
260
180
140
100
OUT
300
220
SW
60
20
I
3405A1518 G18
0
L
–50
Burst Mode Operation
V
V
I
Dynamic Supply Current
vs Temperature
LOAD =
V
V
I
IN
OUT
BURST MODE OPERATION
LOAD
IN
OUT
= 3.6V
–25
= 3.6V
= 1.8V
= 1.8V
= 0A
20mA
0
TEMPERATURE ( C)
25
5 s/DIV
PULSE SKIPPING MODE
50
100mV/DIV
200mA/DIV
200mA/DIV
75
COUPLED
3405A1518 G13
I
3405A1518 G16
V
LOAD
100
OUT
AC
I
L
Load Step
V
V
I
PULSE SKIPPING MODE
LOAD =
125
IN
OUT
= 3.6V
= 1.8V
100mA/DIV
0mA TO 250mA
10mV/DIV
COUPLED
5V/DIV
V
OUT
160
140
120
100
SW
AC
80
60
40
20
I
0
L
–50
40 s/DIV
Pulse Skipping Mode Operation
V
V
I
Switch Leakage vs Temperature
LOAD =
V
RUN = 0V
IN
OUT
IN
= 3.6V
–25
= 5.5V
= 1.8V
20mA
0
TEMPERATURE ( C)
3405A1518 G19
MAIN SWITCH
500ns/DIV
25
SYNCHRONOUS
sn3405a1518 3405a1518fs
50
SWITCH
75
3405A1518 G17
100
3405F G14
125