LTC3405A-1.375_15 Datasheet, PDF (4/12 Pages) Linear Technology – 1.375V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT

LTC3405A-1.375
TYPICAL PERFOR A CE CHARACTERISTICS TA = 25°C unless otherwise noted.
(From Figure 1a)
Dynamic Supply Current
vs Supply Voltage
1600
1400
I_LOAD = 0A
1200
1000
800
600
400
PULSE SKIPPING MODE
200
Burst Mode OPERATION
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
3405A1375 G09
Dynamic Supply Current
vs Temperature
340
V_IN = 3.6V
300 ^ILOAD ^{= 0A}
260
PULSE SKIPPING MODE
220
180
140
100
60
Burst Mode OPERATION
20
0
–50 –25 0 25 50 75
TEMPERATURE (°C)
100 125
3405A1375 G10
Switch Leakage vs Temperature
160
V_IN = 5.5V
140 ^{RUN = 0V}
120
100
80
60
SYNCHRONOUS
40
SWITCH
20
MAIN SWITCH
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3405A1375 G11
Switch Leakage vs Input Voltage
60
RUN = 0V
50
SYNCHRONOUS
SWITCH
40
30
20
MAIN SWITCH
10
Burst Mode Operation
SW
5V/DIV
V_OUT
100mV/DIV
AC COUPLED
I_L
100mA/DIV
Pulse Skipping Mode Operation
SW
5V/DIV
V_OUT
10mV/DIV
I_L
100mA/DIV
0
0
1
2
3
4
56
INPUT VOLTAGE (V)
3405A1375 G12
Start-Up from Shutdown
V_IN = 3.6V
I_LOAD = 20mA
5µs/DIV
3405A1375 G13
Load Step
V_IN = 3.6V
I_LOAD = 20mA
500ns/DIV
3405A1375 G14
RUN
2V/DIV
V_OUT
100mV/DIV
AC
COUPLED
V_OUT
1V/DIV
I_L
200mA/DIV
I_L
200mA/DIV
V_IN = 3.6V
40µs/DIV
I_LOAD = 200mA
3405A1375 G15
I_LOAD
200mA/DIV
V_IN = 3.6V
20µs/DIV
I_LOAD = 0mA TO 250mA
PULSE SKIPPING MODE
3405A1375 G16
4
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