Datasheet

LTC4081
7
4081f
2.7 4.23 3.63.3 3.9 4.5
4081 G24
BATTERY VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (mA)
40
50
60
30
20
0
10
80
70
L = 10μH
V
OUT
SET FOR 1.8V
BATTERY VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (mA)
300
200
100
500
400
2.7 4.23 3.6
3.3 3.9 4.5
4081 G23
L = 10μH
V
OUT
SET FOR 1.8V
20
25
35
15
10
5
0
30
NO LOAD INPUT CURRENT (μA)
L = 10μH
C = 4.7μF
V
OUT
= 1.8V
TEMPERATURE (˚C)
–50 10 50
–30 –10
30 70 90
4081 G18
V
BAT
= 4.2V
V
BAT
= 3.8V
V
BAT
= 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
ON-RESISTANCE (Ω)
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
ON-RESISTANCE (Ω)
4081 G21
BATTERY VOLTAGE (V)
2.5
ON-RESISTANCE (Ω)
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
ON-RESISTANCE (Ω)
0
0.8
1.0
1.2
0.6
0.4
0.2
TYPICAL PERFORMANCE CHARACTERISTICS
(T
A
= 25°C, V
CC
= 5V, V
BAT
= 3.8V, unless otherwise
specifi ed)