LTC3330_15 Datasheet, PDF (9/32 Pages) Linear Technology – Nanopower Buck-Boost DC/DC with Energy Harvesting Battery Life Extender

LTC3330
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C, unless otherwise noted.
I_{PEAK_BUCK} vs Temperature
300
V_IN = 5V
290
280
270
260
250
240
230
220
210
200
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3330 G28
R_DS(ON) of Buck PMOS/NMOS
vs Temperature
Prioritizer Buck to Buck-Boost
Transition
2.0
V_IN = 5V
1.8
OUTPUT
VOLTAGE
50mV/DIV
DC-COUPLED,
OFFSET = 3.3V
1.6
1.4
1.2
1.0
0.8
–50 –25
PMOS
NMOS
0 25 50 75
TEMPERATURE (°C)
EH_ON 0V
5V/DIV
BUCK
INDUCTOR
CURRENT
200mA/DIV
BUCK-BOOST ^0mA
INDUCTOR
CURRENT
200mA/DIV
0mA
100µs/DIV
3330 G30
100 125
3330 G29
V_IN TRANSITIONS 18V TO 17V, UV[3:0] = 1110
BAT = 4.1V, V_OUT = 3.3V
I_LOAD = 50mA, C_OUT = 100µF, L_BUCK = 22µH,
L_BUCK-BOOST = 22µH
Buck-Boost Load Step Response
Buck Load Step Response
OUTPUT
VOLTAGE
20mV/DIV
AC-COUPLED
OUTPUT
VOLTAGE
20mV/DIV
AC-COUPLED
LOAD
CURRENT
25mA/DIV 1mA
2ms/DIV
BAT = 3V, V_OUT = 3.3V
C_OUT = 100µF, L = 22µF
LOAD STEP FROM 1mA TO 50mA
LOAD
CURRENT
25mA/DIV 1mA
3330 G31
2ms/DIV
V_IN = 18V, V_OUT = 3.3V
C_OUT = 100µF, L = 22µF
LOAD STEP FROM 1mA TO 50mA
Prioritizer Buck-Boost to Buck
Transition
OUTPUT
VOLTAGE
50mV/DIV
DC-COUPLED,
OFFSET = 3.3V
3330 G32
EH_ON
5V/DIV 0V
BUCK
INDUCTOR
CURRENT
200mA/DIV ^0mA
BUCK-BOOST
INDUCTOR
CURRENT
200mA/DIV
0mA
100µs/DIV
3330 G33
V_IN TRANSITIONS 17V TO 18V, UV[3:0] = 1110
BAT = 4.1V, V_OUT = 3.3V
I_LOAD = 50mA, C_OUT = 100µF, L_BUCK = 22µH,
L_BUCK-BOOST = 22µH
Buck Efficiency vs I_LOAD
100
90
80
70
60
50
40
30
20
10
0
1µ
V_OUT SETTING
1.8V
2.5V
3.3V
5V
V_IN = 6V, L = 22µH, DCR = 0.19Ω
10µ 100µ 1m
I_LOAD (A)
10m 100m
3330 G34
Buck Efficiency vs V_IN for
I_LOAD = 100mA, L = 22µH
100
DCR = 0.19Ω V_OUT SETTING
1.8V
3.3V
2.5V
3.6V
95
2.8V
4.5V
3V
5V
90
85
80
75
4 6 8 10 12 14 16 18
V_IN (V)
3330 G35
Buck Efficiency vs V_IN for
I_LOAD = 100mA, L = 100µH
100
DCR = 0.45Ω
95
90
85
V_OUT SETTING
80
1.8V
2.5V
2.8V
3V
75
468
3.3V
3.6V
4.5V
5V
10 12 14
V_IN (V)
16 18
3330 G36
For more information www.linear.com/LTC3330
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