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LTC4081 Datasheet(PDF) 7 Page - Linear Technology

Part # LTC4081
Description  500mA Li-Ion Charger with NTC Input and 300mA Synchronous Buck
PDF  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4081 Datasheet(HTML) 7 Page - Linear Technology

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LTC4081
7
4081f
2.7
4.2
3
3.6
3.3
3.9
4.5
4081 G24
BATTERY VOLTAGE (V)
40
50
60
30
20
0
10
80
70
L = 10
μH
VOUT SET FOR 1.8V
BATTERY VOLTAGE (V)
300
200
100
500
400
2.7
4.2
3
3.6
3.3
3.9
4.5
4081 G23
L = 10
μH
VOUT SET FOR 1.8V
20
25
35
15
10
5
0
30
L = 10
μH
C = 4.7
μF
VOUT = 1.8V
TEMPERATURE (˚C)
–50
10
50
–30
–10
30
70
90
4081 G18
VBAT = 4.2V
VBAT = 3.8V
VBAT = 2.7V
No-Load Buck Input Current
(Burst Mode Operation)
vs Temperature
Buck Main Switch (PMOS)
On-Resistance vs Battery Voltage
Buck Main Switch (PMOS)
On-Resistance vs Temperature
Buck Synchronous Switch (NMOS)
On-Resistance vs Battery Voltage
Buck Synchronous Switch (NMOS)
On-Resistance vs Temperature
Maximum Output Current
(PWM Mode) vs Battery Voltage
Maximum Output Current (Burst
Mode Operation) vs Battery Voltage
1.0
1.2
0.8
0.6
0.4
0.2
0
4081 G19
BATTERY VOLTAGE (V)
2.5
4.5
5.0
3.0
3.5
4.0
TEMPERATURE (
°C)
–50
10
50
–30
–10
30
70
90
4081 G20
1.0
1.2
0.8
0.6
0.4
0.2
0
4081 G21
BATTERY VOLTAGE (V)
2.5
0.8
1.0
1.2
4.5
5.0
0.6
0.4
0
3.0
3.5
4.0
0.2
4081 G22
TEMPERATURE (
°C)
–50
10
50
–30
–10
30
70
90
0
0.8
1.0
1.2
0.6
0.4
0.2
TYPICAL PERFORMANCE CHARACTERISTICS (T
A = 25°C, VCC = 5V, VBAT = 3.8V, unless otherwise
specified)



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