LTC3331_15 Datasheet, PDF (12/34 Pages) Linear Technology – Nanopower Buck-Boost DC/DC with Energy Harvesting Battery Charger

LTC3331
TYPICAL PERFORMANCE CHARACTERISTICS ^TA ^{= 25°C, unless otherwise noted.}
Disconnect PMOS Body Diode
Drop vs Current
1000
900
800
700 _{–40°C}
600
25°C
500
400 ^85°C
300
200 125°C
100
0
1µ
10µ
100µ
1m
10m
I_D (A)
3331 G49
R_DS(ON) of Disconnect PMOS
vs Temperature
10
9
BAT_IN = 2.1V
8
7
BAT_IN = 3.1V
6
5
BAT_IN = 4.1V
4
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3331 G50
Battery Connect/Disconnect
vs Temperature
3.8 _{3.45 FLOAT}
3.6 ^{LBSEL = 0}
I_{BAT_OUT} = 1mA
3.4
3.2
CONNECT, BAT_OUT
3.0
2.8
2.6
2.4
CONNECT, BAT_IN
2.2
DISCONNECT, BAT_OUT, BAT_IN
2.0
–50 –25 0 25 50 75 100 125
TEMPERATURE (°C)
3331 G55
12
Battery Connect Voltage at
BAT_IN vs I_{BAT_OUT}
4.4
4.0, 4.1, 4.2 FLOAT, LBSEL = 1
4.2
4.0, 4.1, 4.2 FLOAT, LBSEL = 0
4.0
3.45 FLOAT, LBSEL = 1
3.45 FLOAT, LBSEL = 0
3.8
3.6
3.4
3.2
3.0
2.8
2.6
2.4
2.2
1µ
10µ
100µ
1m
10m
I_{BAT_OUT} (A)
3331 G51
Battery Connect Voltage at
BAT_OUT vs I_{BAT_OUT}
4.4
4.2
4.0
3.8
3.6
3.4
3.2
3.0
2.8
2.6
2.4
2.2
1µ
4.0, 4.1, 4.2 FLOAT, LBSEL = 1
4.0, 4.1, 4.2 FLOAT, LBSEL = 0
3.45 FLOAT, LBSEL = 1
3.45 FLOAT, LBSEL = 0
10µ
100µ
1m
10m
I_{BAT_OUT} (A)
3331 G52
Battery Disconnect Voltage at
BAT_IN vs I_{BAT_IN}
3.8
4.0, 4.1, 4.2 FLOAT, LBSEL = 1
3.6
4.0, 4.1, 4.2 FLOAT, LBSEL = 0
3.4
3.45 FLOAT, LBSEL = 1
3.45 FLOAT, LBSEL = 0
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1µ
10µ
100µ
I_{BAT_IN} (A)
1m
10m
3331 G53
Battery Disconnect Voltage at
BAT_OUT vs I_{BAT_IN}
3.8
4.0, 4.1, 4.2 FLOAT, LBSEL = 1
3.6
4.0, 4.1, 4.2 FLOAT, LBSEL = 0
3.4
3.45 FLOAT, LBSEL = 1
3.45 FLOAT, LBSEL = 0
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1µ
10µ
100µ
I_{BAT_IN} (A)
1m
10m
3331 G54
Battery Connect/Disconnect
vs Temperature
3.8
3.6
CONNECT, BAT_OUT
3.4
3.2
3.0
CONNECT, BAT_IN
2.8
2.6
DISCONNECT, BAT_OUT, BAT_IN
2.4
3.45 FLOAT
2.2 ^{LBSEL = 1}
I_{BAT_OUT} = 1mA
2.0
–50 –25 0 25 50 75
TEMPERATURE (°C)
100 125
3331 G56
Battery Connect Transient
BATTERY
BAT_IN
CONNECTED
4.2V
1V/DIV
0V
BAT_OUT
2.5ms/DIV
3331 G57
V_IN = 18V, V_OUT IN REGULATION, SLEEPING
10mA CHARGES BB_IN/BAT_OUT
C_{BB_IN} = 22µF
FLOAT[1:0] = 11, LBSEL = 0
3331fb
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