LTC3541-2(RevA) Просмотр технического описания (PDF) - Linear Technology
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LTC3541-2 Datasheet PDF : 20 Pages
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LTC3541-2
TYPICAL PERFOR A CE CHARACTERISTICS
Efficiency vs Input Voltage for
Buck (Pulse Skip)
95
90
IOUT = 500mA
85
80
IOUT = 100mA
75
70
IOUT = 30mA
65
60
55
50
2
3
4
5
6
INPUT VOLTAGE (V)
35412 G01
Efficiency vs Input Voltage for
Buck (Burst)
100
95
90
IOUT = 500mA
85
80
IOUT = 100mA
IOUT = 30mA
75
70
65
60
55
50
2
3
4
5
6
INPUT VOLTAGE (V)
35412 G02
Efficiency vs Load Current for
Buck (Pulse Skip)
100
90
VIN = 2.7V
80
VIN = 3.6V
70
VIN = 4.2V
60
50
40
30
20
10
0
0.1
1
10
100
1000
LOAD CURRENT (mA)
35412 G03
Efficiency vs Load Current for
Buck (Burst)
100
90
VIN = 3.6V VIN = 2.7V
80
VIN = 4.2V
70
60
50
40
30
20
10
0
0.1
1
10
100
1000
LOAD CURRENT (mA)
35412 G04
VLDO Dropout Voltage
vs Load Current
100
80
VIN = 3V
VIN = 3.6V
60
VIN = 4.2V
40
20
0
0 50 100 150 200 250 300
LOAD CURRENT (mA)
35412 G05
Buck (Burst) Plus VLDO Bias
Current vs VLDO Load Current
250
VIN = 3.6V
ILOAD_BUCK = 0
200 IBIAS = IVIN + ILVIN – ILOAD
150
100
50
0
0.1
1
10
100
1000
LOAD CURRENT (mA)
35412 G06
Output (Auto Start-Up Sequence,
Buck in Pulse Skip) vs Time
VOUT
1V/DIV
LVOUT
1V/DIV
VIN
2V/DIV
IVOUT = 200mA 2ms/DIV
ILVOUT = 300mA
35412 G07
Oscillator Frequency
vs Temperature
2.50
VIN = 3.6V
2.45
2.40
2.35
2.30
2.25
2.20
2.15
2.10
2.05
2.00
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
35412 G08
35412fb
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