LTC3546 Datasheet, PDF (8/28 Pages) Linear Technology – Dual Synchronous, 3A/1A or 2A/2A Confi gurable Step-Down DC/DC Regulator

LTC3546
TYPICAL PERFORMANCE CHARACTERISTICS
OUT2 Efficiency vs V_IN
100
98
96
94
600mA
92
90
88
86
3A
84
82 ^{SW1D CONNECTED TO SW2}
V_OUT = 2.5V
80
2.25 2.75 3.25 3.75 4.25 4.75 5.25
V_IN (V)
3546 G20
OUT2 Efficiency vs V_IN
100
98
96
94
92
400mA
90
88
2A
86
84
82 ^{SW1D CONNECTED TO SW1}
V_OUT = 2.5V
80
2.25 2.75 3.25 3.75 4.25 4.75 5.25
V_IN (V)
3546 G21
OUT1 Load Step
V_OUT
100mV/DIV
I_LOAD
1A/DIV
100μs/DIV
SW1D CONNECTED TO SW1
V_IN = 3.6V
V_OUT = 1.2V
I_LOAD = 200mA TO 1.9A
OUT1 Load Step
V_OUT
100mV/DIV
I_LOAD
250mA/DIV
100μs/DIV
SW1D CONNECTED TO SW2
V_IN = 3.6V
V_OUT = 1.2V
I_LOAD = 100mA TO 0.9A
OUT2 Load Step
V_OUT
100mV/DIV
I_LOAD
1A/DIV
3546 G23
100μs/DIV
SW1D CONNECTED TO SW2
V_IN = 3.6V
V_OUT = 1.8V
I_LOAD = 300mA TO 2.9A
OUT2 Load Step
V_OUT
100mV/DIV
I_LOAD
1A/DIV
3546 G24
100μs/DIV
SW1D CONNECTED TO SW1
V_IN = 3.6V
V_OUT = 1.8V
I_LOAD = 200mA TO 1.9A
3546 G22
3546 G25
3546f
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