LTC3406B-2 Datasheet, PDF (4/16 Pages) Linear Technology – 2.25MHz, 600mA Synchronous Step-Down Regulator in ThinSOT

LTC3406B-2
TYPICAL PERFOR A CE CHARACTERISTICS
(From Figure 1a Except for the Resistive Divider Resistor Values)
R_DS(ON) vs Temperature
0.7
V_IN = 2.7V
0.6
V_IN = 4.2V ^{VIN = 3.6V}
0.5
0.4
0.3
0.2
0.1
0
–50
MAIN SWITCH
SYNCHRONOUS SWITCH
–25 0 25 50 75
TEMPERATURE (°C)
100 125
3406B G10
Switch Leakage vs Temperature
300
V_IN = 5.5V
RUN = 0V
250
200
150
100
MAIN SWITCH
50
SYNCHRONOUS SWITCH
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3406B G13
Dynamic Supply Current vs
Supply Voltage
450 _{VOUT = 1.8V}
430 I_LOAD = 0A
410 ^{TA = 25°C}
390
370
350
330
310
290
270
250
2 2.5 3 3.5 4 4.5 5 5.5 6
SUPPLY VOLTAGE (V)
3406B G11
Dynamic Supply Current vs
Temperature
390
V_IN = 3.6V
370
V_OUT = 1.8V
I_LOAD = 0A
350
330
310
290
270
250
–50
0
50
TEMPERATURE (°C)
100 125
3406B G12
Switch Leakage vs Input Voltage
120
RUN = 0V
T_A = 25°C
100
SYNCHRONOUS
SWITCH
80
60
MAIN
SWITCH
40
Discontinuous Operation
SW
2V/DIV
V_OUT
10mV/DIV
AC COUPLED
I_L
100mA/DIV
20
0
0
1
2
3
4
56
INPUT VOLTAGE (V)
3406B G14
V_IN = 3.6V
V_OUT = 1.8V
I_LOAD = 50mA
1µs/DIV
3406B G15
Start-Up from Shutdown
Load Step
RUN
5V/DIV
V_OUT
1V/DIV
AC COUPLED
I_L
500mA/DIV
V_OUT
100mV/DIV
AC COUPLED
I_L
500mA/DIV
I_LOAD
500mA/DIV
V_IN = 3.6V
40µs/DIV
3406B G16
V_OUT = 1.8V
I_LOAD = 600mA (LOAD: 3Ω RESISTOR)
V_IN = 3.6V
20µs/DIV
V_OUT = 1.8V
I_LOAD = 0mA TO 600mA
Load Step
V_OUT
100mV/DIV
AC COUPLED
I_L
500mA/DIV
I_LOAD
500mA/DIV
3406B G17
V_IN = 3.6V
20µs/DIV
V_OUT = 1.8V
I_LOAD = 50mA TO 600mA
3406B G18
4
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