ltc3405a-1.375 Linear Technology Corporation, ltc3405a-1.375 Datasheet - Page 4

• Manufacturer Part Number: ltc3405a-1.375
• Description: 1.375v, 1.5mhz, 300ma Synchronous Step-down Regulators In Thinsot
• Manufacturer: Linear Technology Corporation

LTC3405A-1.375
(From Figure 1a)
TYPICAL PERFOR A CE CHARACTERISTICS
4
1600
1400
1200
1000
800
600
400
200
60
50
40
30
20
10
0
0
2.0
Switch Leakage vs Input Voltage
0
Dynamic Supply Current
vs Supply Voltage
RUN = 0V
2.5
1
200mA/DIV
PULSE SKIPPING MODE
Burst Mode OPERATION
3.0
SUPPLY VOLTAGE (V)
SYNCHRONOUS
INPUT VOLTAGE (V)
MAIN SWITCH
2V/DIV
1V/DIV
2
V
SWITCH
RUN
OUT
3.5
I
L
3
V
I
Start-Up from Shutdown
LOAD =
IN
4.0
= 3.6V
4
200mA
4.5
W
I
LOAD
3405A1375 G12
3405A1375 G09
5
5.0
= 0A
40µs/DIV
U
5.5
6
AC COUPLED
100mV/DIV
100mA/DIV
5V/DIV
V
340
180
140
100
300
260
220
OUT
SW
60
20
0
I
3405A1375 G15
–50
L
Burst Mode Operation
V
I
Dynamic Supply Current
vs Temperature
V
I
LOAD =
Burst Mode OPERATION
IN
LOAD
IN
–25
= 3.6V
= 3.6V
= 0A
20mA
0
TEMPERATURE (°C)
25
5µs/DIV
PULSE SKIPPING MODE
50
100mV/DIV
200mA/DIV
200mA/DIV
75
COUPLED
I
V
LOAD
3405A1375 G10
100
3405A1375 G13
OUT
AC
I
L
T
A
Load Step
V
I
PULSE SKIPPING MODE
LOAD =
125
IN
= 25°C unless otherwise noted.
= 3.6V
0mA TO 250mA
100mA/DIV
10mV/DIV
5V/DIV
V
160
140
120
100
OUT
SW
80
60
40
20
I
0
L
–50
20µs/DIV
Pulse Skipping Mode Operation
V
I
Switch Leakage vs Temperature
LOAD =
V
RUN = 0V
IN
IN
= 3.6V
–25
= 5.5V
20mA
0
TEMPERATURE (°C)
3405A1375 G16
MAIN SWITCH
500ns/DIV
25
SYNCHRONOUS
50
SWITCH
75
3405a1375f
3405A1375 G14
100
3405A1375 G11
125