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LTC4080 Datasheet(PDF) 6 Page - Linear Technology

Part # LTC4080
Description  500mA Standalone Li-Ion Charger with Integrated 300mA Synchronous Buck
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4080 Datasheet(HTML) 6 Page - Linear Technology

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LTC4080
6
4080fb
20
25
35
15
10
5
0
30
4080 G17
BATTERY VOLTAGE (V)
2.5
4.5
3.0
3.5
4.0
IOUT = 1mA
VOUT = 1.8V
L = 10
μH
TEMPERATURE (
°C)
0.80
0.90
1.05
0.85
1.00
0.95
4080 G10
–50
30
–10
–30
50
70
10
90
BATTERY VOLTAGE (V)
2.5
2.26
2.27
2.28
4.0
4080 G11
2.25
2.24
3.0
3.5
4.5
2.23
2.22
TEMPERATURE (
°C)
–60
1.8
1.9
2.0
2.1
2.2
–20
20
60
100
2.3
2.4
–40
0
40
80
4080 G12
VBAT = 2.7V
VBAT = 4.5V
VBAT = 3.8V
LOAD CURRENT (mA)
0.01
40
60
80
0.1
10
100
1
1000
20
0
100
0
10
100
0.1
0.01
1000
4080 G13
VBAT = 3.8V
VOUT = 1.8V
L = 10
μH
C = 4.7
μF
EFFICIENCY
(Burst)
POWER LOSS
(Burst)
EFFICIENCY
(PWM)
POWER
LOSS
(PWM)
BATTERY VOLTAGE (V)
2.5
1.780
1.785
1.790
1.795
1.800
1.805
1.810
3.0
3.5
4.0
4.5
4080 G14
PWM MODE
IOUT = 1mA
VOUT SET FOR 1.8V
Burst Mode
OPERATION
TEMPERATURE (˚C)
–50
1.800
1.805
1.810
10
50
1.795
1.790
–30
–10
30
70
90
1.785
1.780
4080 G15
PWM MODE
Burst Mode
OPERATION
IOUT = 1mA
VOUT SET FOR 1.8V
No-Load Buck Input Current
(Burst Mode Operation)
vs Battery Voltage
Normalized Charger Timer
Period vs Temperature
Buck Oscillator Frequency
vs Battery Voltage
Buck Oscillator Frequency
vs Temperature
Buck Efficiency vs Load Current
(VOUT = 1.8V)
Buck Output Voltage
vs Battery Voltage
Buck Output Voltage
vs Temperature
70
40
20
10
0
80
60
50
30
4080 G09
ICHRG, IACPR = 5mA
TEMPERATURE (
°C)
–50
30
–10
–30
50
70
10
90
⎯C⎯H⎯R⎯G and ⎯A⎯C⎯P⎯R Pin Output
Low Voltage vs Temperature
TYPICAL PERFORMANCE CHARACTERISTICS
Buck Efficiency vs Load Current
(VOUT = 1.5V)
LOAD CURRENT (mA)
0.01
40
60
80
0.1
10
100
1
1000
20
0
100
0
10
100
0.1
0.01
1000
4080 G13a
VBAT = 3.8V
VOUT = 1.5V
L = 10
μH
C = 4.7
μF
EFFICIENCY
(Burst)
POWER LOSS
(Burst)
EFFICIENCY
(PWM)
POWER
LOSS
(PWM)
(TA = 25°C, VCC = 5V, VBAT = 3.8V, unless otherwise specified)



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