LTC4080EMSE View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC4080EMSE Datasheet PDF : 20 Pages
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LTC4080
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
0
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
4080 G09
Normalized Charger Timer
Period vs Temperature
1.05
1.00
0.95
0.90
0.85
0.80
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
4080 G10
Buck Oscillator Frequency
vs Battery Voltage
2.28
2.27
2.26
2.25
2.24
2.23
2.22
2.5
3.0
3.5
4.0
BATTERY VOLTAGE (V)
4.5
4080 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
4080 G12
Buck Efficiency vs Load Current
(VOUT = 1.8V)
100
1000
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
0
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)
4080 G13
EFFICIENCY
80 (Burst)
EFFICIENCY
(PWM)
60
100
POWER
LOSS 10
(PWM)
40
20
0
0.01
POWER LOSS
0
(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)
4080 G13a
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
4080 G14
1.780
–50 –30
–10 10 30 50
TEMPERATURE (˚C)
70 90
4080 G15
6
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
BATTERY VOLTAGE (V)
4.5
4080 G17
4080fb
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