LTC3331_15 Datasheet, PDF (11/34 Pages) Linear Technology – Nanopower Buck-Boost DC/DC with Energy Harvesting Battery Charger

LTC3331
TYPICAL PERFORMANCE CHARACTERISTICS ^TA ^{= 25°C, unless otherwise noted.}
Buck-Boost Efficiency vs BB_IN for
V_OUT = 1.8V, 250mA I_PEAK Setting
100
L = 22µH
DCR = 0.36Ω
90
80
70
60
I_LOAD = 50mA
I_LOAD = 100µA
I_LOAD = 50µA
50
I_LOAD = 20µA
I_LOAD = 10µA
I_LOAD = 5µA
40
2.1 2.4 2.7 3 3.3 3.6
BB_IN (V)
3.9 4.2
3331 G40
Buck-Boost Efficiency vs BB_IN for
V_OUT = 1.8V, 5mA I_PEAK Setting
100
L = 1000µH
DCR = 5.1Ω
90
80
70
60
I_LOAD = 1mA
I_LOAD = 100µA
I_LOAD = 50µA
50
I_LOAD = 20µA
I_LOAD = 10µA
I_LOAD = 5µA
40
2.1 2.4 2.7 3 3.3 3.6
BB_IN (V)
3.9 4.2
3331 G43
3.45V Float Voltage
vs Temperature
3.65
I_{BB_IN} = 1mA
3.60
3.55
3.50
3.45
3.40
3.35
3.30
3.25
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3331 G46
Buck-Boost Efficiency vs BB_IN for
V_OUT = 3.3V, 250mA I_PEAK Setting
100
L = 22µH
DCR = 0.36Ω
90
80
70
60
I_LOAD = 50mA
I_LOAD = 100µA
I_LOAD = 50µA
50
I_LOAD = 20µA
I_LOAD = 10µA
I_LOAD = 5µA
40
2.1 2.4 2.7 3 3.3 3.6
BB_IN (V)
3.9 4.2
3331 G41
Buck-Boost Efficiency vs BB_IN for
V_OUT = 3.3V, 5mA I_PEAK Setting
100
L = 1000µH
DCR = 5.1Ω
90
80
70
60
I_LOAD = 1mA
I_LOAD = 100µA
I_LOAD = 50µA
50
I_LOAD = 20µA
I_LOAD = 10µA
I_LOAD = 5µA
40
2.1 2.4 2.7 3 3.3 3.6
BB_IN (V)
3.9 4.2
3331 G44
4V, 4.1V, 4.2V Float Voltage
vs Temperature
4.30
I_{BB_IN} = 1mA
4.25
4.20
4.15
4.10
4.05
4.00
3.95
3.90
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3331 G47
For more information www.linear.com/LTC3331
Buck-Boost Efficiency vs BB_IN for
V_OUT = 5V, 250mA I_PEAK Setting
100
L = 22µH
DCR = 0.36Ω
90
80
70
60
I_LOAD = 50mA
I_LOAD = 100µA
I_LOAD = 50µA
50
I_LOAD = 20µA
I_LOAD = 10µA
I_LOAD = 5µA
40
2.1 2.4 2.7 3 3.3 3.6
BB_IN (V)
3.9 4.2
3331 G42
Buck-Boost Efficiency vs BB_IN for
V_OUT = 5V, 5mA I_PEAK Setting
100
L = 1000µH
DCR = 5.1Ω
90
80
70
60
I_LOAD = 1mA
I_LOAD = 100µA
I_LOAD = 50µA
50
I_LOAD = 20µA
I_LOAD = 10µA
I_LOAD = 5µA
40
2.1 2.4 2.7 3 3.3 3.6
BB_IN (V)
3.9 4.2
3331 G45
Shunt Float Voltage Load
Regulation
8
ALL FLOAT SETTINGS IN SLEEP
7
6
5
4
3
2
1
0
1µ
10µ
100µ
1m
10m
I_{BB_IN} (A)
3331 G48
3331fb
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