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LTC3335_15 Datasheet, PDF (9/28 Pages) Linear Technology – Nanopower Buck-Boost DC/DC with Integrated Coulomb Counter
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LTC3335
Typical Performance Characteristics TA = 25°C, BAT = PBAT = 3.6V, GNDA = GNDD =
PGND = 0V, VOUT = PVOUT = 3.3V, 100mA IPEAK setting, unless otherwise noted.
RDS(ON) vs Temperature,
250mA Setting
100
PMOS A, BAT = 1.8V
90
PMOS A, BAT = 5.5V
80
NMOS B, BAT = 1.8V
NMOS B, BAT = 5.5V
70
60
50
40
30
20
10
0
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3335 G19
RDS(ON) vs Temperature,
250mA Setting
2.50
2.25
PMOS D, VOUT = 1.8V
PMOS D, VOUT = 5V
2.00
NMOS C, BAT = 1.8V
NMOS C, BAT = 5.5V
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0.00
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3335 G20
RDS(ON) vs Temperature,
5mA Setting
80
75
PMOS A, BAT = 1.8V
70
PMOS A, BAT = 5.5V
65
NMOS B, BAT = 1.8V
60
NMOS B, BAT = 5.5V
55
50
45
40
35
30
25
20
15
10
5
0
–50 –30 –10 10 30 50 70
90 110 130
TEMPERATURE (°C)
3335 G21
RDS(ON) vs Temperature,
5mA Setting
80
75
PMOS D, VOUT = 1.8V
70
PMOS D, VOUT = 5V
65
NMOS C, BAT = 1.8V
60
NMOS C, BAT = 5.5V
55
50
45
40
35
30
25
20
15
10
5
0
–50 –30 –10 10 30 50 70
90 110 130
TEMPERATURE (°C)
3335 G22
Efficiency vs Load Current
for 250mA IPEAK Setting
100
90
80
70
60
50
40
30
VOUT = 1.8V BAT = 3.6V
20
VOUT = 2.5V L = 47µH
10
VOUT = 3.3V DCR = 0.33Ω
VOUT = 5V
0
0.001 0.01 0.1
1.0
10
100
ILOAD (mA)
3335 G23
Efficiency vs Load Current
for 100mA IPEAK Setting
100
90
80
70
60
50
40
30
VOUT = 1.8V BAT = 3.6V
20
VOUT = 2.5V L = 100µH
10
VOUT = 3.3V DCR = 0.6Ω
VOUT = 5V
0
0.001 0.01 0.1
1.0
10
100
ILOAD (mA)
3335 G24
Efficiency vs Load Current
for 5mA IPEAK Setting
100
Efficiency vs BAT for 250mA
IPEAK Setting
100
Efficiency vs BAT for 100mA
IPEAK Setting
100
90
80
90
90
70
80
80
60
50
70
70
40
30
20
10
0
0.001
VOUT = 1.8V
VOUT = 2.5V
VOUT = 3.3V
VOUT = 5V
BAT = 3.6V
L = 2.2mH
DCR = 11Ω
0.01
0.1
ILOAD (mA)
1.0
3335 G25
60
ILOAD = 25mA VOUT = 3.3V
50
ILOAD = 250µA L = 47µH
ILOAD = 25µA DCR = 0.33Ω
ILOAD = 5µA
40
1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3
BAT (V)
3335 G26
60
ILOAD = 10mA VOUT = 3.3V
50
ILOAD = 100µA L = 100µH
ILOAD = 10µA DCR = 0.6Ω
ILOAD = 5µA
40
1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3
BAT (V)
3335 G27
3335p
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