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LTC3565_12 Datasheet, PDF (4/22 Pages) Linear Technology – 1.25A, 4MHz, Synchronous Step-Down DC/DC Converter | |||
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LTC3565
TYPICAL PERFORMANCE CHARACTERISTICS TJ = 25°C, VIN = 3.6V, fO = 1MHz, unless
otherwise noted.
Efï¬ciency vs Input Voltage
100
IOUT = 100mA IOUT = 10mA
90
80
IOUT = 1.25A
IOUT = 1mA
70
60
50
IOUT = 0.1mA
40
VOUT = 1.8V
30
2.5 3.0 3.5 4.0 4.5
INPUT VOLTAGE(V)
5.0 5.5
3565 G01
Efï¬ciency vs Output Current
100
Burst Mode
90 OPERATION
80
70
PULSE
SKIP
60
50
FORCED CONTINUOUS
40
30
20
10
0
0.1
VOUT = 1.8V
1
10
100 1000 10000
OUTPUT CURRENT (mA)
3565 G04
Line Regulation
0.6
0.4
0.2
0.0
â0.2
â0.4
VOUT = 1.8V
ILOAD = 400mA
â0.6
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE(V)
3565 G07
Efï¬ciency vs Output Current
100
90
80
70
60
50
40
30
20
10
VOUT = 1.8V
0
0.1
1
10
VIN = 2.7V
VIN = 3.6V
VIN = 4.2V
100 1000 10000
OUTPUT CURRENT (mA)
3565 G02
Efï¬ciency vs Output Current
100
90
80
70
60
50
40
30
20
10
VOUT = 1.5V
0
0.1
1
10
VIN = 2.7V
VIN = 3.6V
VIN = 4.2V
100 1000 10000
OUTPUT CURRENT (mA)
3565 G03
Efï¬ciency vs Frequency
95
4.7μH
94
93
2.2μH
92
91
90
1μH
89
VOUT = 1.8V
88
0
1
2
3
4
5
FREQUENCY (MHz)
3565 G05
Reference Voltage vs
Temperature
615
Load Regulation
1.00
0.75
0.50
0.25
0.00
â0.25
â0.50
0
Burst Mode OPERATION
PULSE SKIP
FORCED CONTINUOUS
VOUT = 1.8V
200 400 600 800 1000 1200 1400
OUTPUT CURRENT(mA)
3565 G06
Frequency Variation vs
Temperature
6
610
4
605
2
600
0
595
â2
590
â4
585
â50 â25
0 25 50 75
TEMPERATURE (°C)
100 125
3565 G08
â6
â50 â25
0 25 50 75
TEMPERATURE(°C)
100 125
3565 G09
3565fb
4
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