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| LTC3546 Datasheet, PDF (6/28 Pages) Linear Technology – Dual Synchronous, 3A/1A or 2A/2A Confi gurable Step-Down DC/DC Regulator | |||
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LTC3546
TYPICAL PERFORMANCE CHARACTERISTICS
OUT2 Burst Mode Operation
OUT2 Pulse-Skipping Mode
Operation
OUT2 Forced Continuous Mode
Operation
VOUT
20mV/DIV
ILOAD
500mA/DIV
1μs/DIV
SW1D CONNECTED TO SW1
VIN = 3.6V
VOUT = 2.5V
ILOAD = 300mA
VOUT
20mV/DIV
ILOAD
250mA/DIV
3546 G11
1μs/DIV
SW1D CONNECTED TO SW1
VIN = 3.6V
VOUT = 1.8V
ILOAD = 200mA
VOUT
20mV/DIV
ILOAD
250mA/DIV
3546 G12
1μs/DIV
SW1D CONNECTED TO SW1
VIN = 3.6V
VOUT = 1.8V
ILOAD = 100mA
3546 G13
OUT1 Efï¬ciency vs Load Current
95
SW1D CONNECTED TO SW1
90
VIN = 3.6V
VOUT = 1.8V
85
80
75
70
65
60
0.001
Burst Mode
OPERATION
PULSE SKIP
FORCED
CONTINUOUS
0.01
0.1
ILOAD (A)
1
10
3546 G14
OUT1 Efï¬ciency vs Load Current
95
SW1D CONNECTED TO SW2
90
VIN = 3.6V
VOUT = 1.8V
85
80
75
70
65
60
0.001
Burst Mode
OPERATION
PULSE SKIP
FORCED
CONTINUOUS
0.01
0.1
ILOAD (A)
1
3546 G15
OUT2 Efï¬ciency vs Load Current
100
SW1D CONNECTED TO SW2
95 VIN = 3.6V
VOUT = 2.5V
90
85
80
75
70
65
60
0.001
Burst Mode
OPERATION
PULSE SKIP
FORCED
CONTINUOUS
0.01
0.1
ILOAD (A)
1
10
3546 G16
OUT2 Efï¬ciency vs Load Current
100
SW1D CONNECTED TO SW1
95
VIN = 3.6V
VOUT = 2.5V
90
85
80
75
70
65
60
0.001
Burst Mode
OPERATION
PULSE SKIP
FORCED
CONTINUOUS
0.01
0.1
ILOAD (A)
1
10
3546 G17
OUT1 Efï¬ciency vs VIN
100
SW1D CONNECTED TO SW1
98 VOUT = 1.8V
96
94
92
400mA
90
88
86
2A
84
82
80
2.25 2.75 3.25 3.75 4.25 4.75 5.25
VIN (V)
3546 G18
6
OUT1 Efï¬ciency vs VIN
100
SW1D CONNECTED TO SW2
98 VOUT = 1.8V
96
94
92
90
200mA
88
86
84
1A
82
80
2.25 2.75 3.25 3.75 4.25 4.75 5.25
VIN (V)
3546 G19
3546fb
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