LTC4080X 查看數據表（PDF） - Linear Technology
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LTC4080X
Linear Technology
LTC4080X Datasheet PDF : 20 Pages
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LTC4080X
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C, VCC = 5V, VBAT = 3.8V, unless otherwise
specified)
⎯C⎯H⎯R⎯G and ⎯A⎯C⎯P⎯R Pin Output
Low Voltage vs Temperature
80
ICHRG, IACPR = 5mA
70
60
50
40
30
20
10
Normalized Charge Termination
Time vs Temperature
1.05
1.00
0.95
0.90
0.85
Buck Oscillator Frequency
vs Battery Voltage
2.28
2.27
2.26
2.25
2.24
2.23
0
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
4080X G09
0.80
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
4080X G10
2.22
2.5
3.0
3.5
4.0
BATTERY VOLTAGE (V)
4.5
4080X G11
Buck Oscillator Frequency
vs Temperature
2.4
VBAT = 3.8V
2.3
VBAT = 4.5V
2.2
VBAT = 2.7V
2.1
2.0
1.9
1.8
–60 –40 –20 0 20 40 60
TEMPERATURE (°C)
80 100
4080X G12
Buck Efficiency vs Load Current
(VOUT = 1.8V)
100
1000
EFFICIENCY
80 (Burst)
EFFICIENCY
(PWM)
60
100
POWER
LOSS 10
(PWM)
40
20
0
0.01
1
POWER LOSS
(Burst)
VBAT = 3.8V
VOUT = 1.8V
0.1
L = 10µH
C = 4.7µF
0.01
0.1
1
10 100 1000
LOAD CURRENT (mA)
4080X G13
Buck Output Voltage
vs Battery Voltage
1.810
IOUT = 1mA
VOUT SET FOR 1.8V
1.805
Burst Mode
OPERATION
1.800
PWM MODE
Buck Output Voltage
vs Temperature
1.810
1.805
IOUT = 1mA
VOUT SET FOR 1.8V
Burst Mode
OPERATION
1.800
PWM MODE
1.795
1.795
1.790
1.790
1.785
1.785
1.780
2.5
3.0
3.5
4.0
BATTERY VOLTAGE (V)
4.5
4080X G14
1.780
–50 –30
–10 10 30 50
TEMPERATURE (˚C)
70 90
4080X G15
6
Buck Efficiency vs Load Current
(VOUT = 1.5V)
100
1000
EFFICIENCY
80 (Burst)
EFFICIENCY
(PWM)
60
100
POWER
LOSS 10
(PWM)
40
20
0
0.01
POWER LOSS
1
(Burst)
VBAT = 3.8V
VOUT = 1.5V
0.1
L = 10µH
C = 4.7µF
0.01
0.1
1
10 100 1000
LOAD CURRENT (mA)
4080X G13a
No-Load Buck Input Current
(Burst Mode Operation)
vs Battery Voltage
35
IOUT = 1mA
30
VOUT = 1.8V
L = 10µH
25
20
15
10
5
0
2.5
3.0
3.5
4.0
4.5
BATTERY VOLTAGE (V)
4080X G17
4080Xf
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