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| LTC3409_15 Datasheet, PDF (4/16 Pages) Linear Technology – 600mA Low VIN Buck Regulator in 3mm 3mm DFN | |||
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LTC3409
TYPICAL PERFORMANCE CHARACTERISTICS
(From Typical Application on the front page except for the resistive divider resistor values)
Efï¬ciency/Power Lost
vs Load Current, VOUT = 1.8V
100
1.0
90
1
80
2
0.1
70
3
45 6
60
50
8
40
10
30
12
20
10
7
11
9
0.01
0.001
0
0.1
1
0.0001
10
100
1000
LOAD CURRENT (mA)
3409 G01
1: 2.5VIN, BURST
2: 3.6VIN, BURST
3: 4.2VIN, BURST
4: 2.5VIN, PULSE SKIP
5: 3.6VIN, PULSE SKIP
6: 4.2VIN, PULSE SKIP
7: POWER LOST, 2.5VIN, BURST
8: POWER LOST, 2.5VIN, PULSE SKIP
9: POWER LOST, 3.6VIN, BURST
10: POWER LOST, 3.6VIN, PULSE SKIP
11: POWER LOST, 4.2VIN, BURST
12: POWER LOST, 4.2VIN, PULSE SKIP
Efï¬ciency vs Input Voltage
VOUT = 1.2V, Burst Mode Operation
100
90
80
70
60
50
40
30
20
10
0
1.5
IOUT = 0.1mA
IOUT = 1mA
IOUT = 10mA
IOUT = 100mA
IOUT = 600mA
IOUT = 800mA
2.5
3.5
4.5
5.5
INPUT VOLTAGE (V)
3409 G02
Efï¬ciency vs Input Voltage
VOUT = 1.2V, Pulse Skip
100
90
IOUT = 600mA
80
70
IOUT = 800mA
IOUT = 100mA
60
50
IOUT = 10mA
40
30
IOUT = 1mA
20
IOUT = 0.1mA
10
0
1.5
2.5
3.5
4.5
5.5
INPUT VOLTAGE (V)
3409 G03
Efï¬ciency vs Load Current
VOUT = 2.5V
100
BURST
90
2.7VIN
80
4.2VIN
70
3.6VIN
60
50
40
2.7VIN
30
3.6VIN
4.2VIN
PULSE SKIP
20
10
0
0.1
1
10
100
LOAD CURRENT (mA)
1000
3409 G04
Efï¬ciency vs Load Current
VOUT = 1.2V
100
BURST
90
2.5VIN
80
1.6VIN
70
60
3.1VIN
3.1VIN
2.5VIN
50
40
30
1.6VIN
20
PULSE SKIP
10
0
0.1
1
10
100
LOAD CURRENT (mA)
1000
3409 G05
Reference Voltage
vs Temperature
0.618
0.617
0.616
0.615
0.614
0.613
0.612
0.611
0.610
0.609
0.608
â50 â30 â10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
3409 G06
3409fc
4
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