LTC3429_15 Datasheet, PDF (3/12 Pages) Linear Technology – 600mA, 500kHz Micropower Synchronous Boost Converter with Output Disconnect

LTC3429/LTC3429B
TYPICAL PERFOR A CE CHARACTERISTICS (T_A = 25°C unless otherwise specified)
Single-Cell to 3.3V Efficiency
(LTC3429 Only)
100
100
90
V_IN = 1.5V
80
EFFICIENCY
V_IN = 1.2V
70
V_IN = 1.2V
60
V_IN = 1.5V
50
POWER LOSS
10
1
0.1
0.01
0.001
40
0.1
1
10
100
OUTPUT CURRENT (mA)
0.0001
1000
3429 G01
2-Cell to 5V Efficiency
(LTC3429 Only)
100
90
V_IN = 3V
80
EFFICIENCY
V_IN = 2.4V
70
V_IN = 2.4V
V_IN = 3V
60
POWER LOSS
50
100
10
1
0.1
0.01
0.001
2-Cell to 3.3V Efficiency
(LTC3429 Only)
100
100
V_IN = 3V
90 EFFICIENCY
10
V_IN = 2.4V
80
1
70
60
50
40
0.1
V_IN = 2.4V
0.1
V_IN = 3V _0.01
POWER LOSS
0.001
1
10
100
OUTPUT CURRENT (mA)
0.0001
1000
3429 G02
Li-Ion to 5V Efficiency
(LTC3429 Only)
100
100
V_IN = 4.2V
90
10
EFFICIENCY
V_IN = 3.6V
80
1
70
0.1
V_IN = 3.6V
60
V_IN = 4.2V _0.01
POWER LOSS
50
0.001
Efficiency vs Input Voltage
100
V_OUT = 3.3V
I_OUT = 50mA
90
80
70
60
50
40
0.5
V_IN > V_OUT
PMOS LDO
MODE
1.5
2.5
3.5
4.5
INPUT VOLTAGE (V)
3429 G05
Burst Mode Output Current
Threshold vs Input Voltage
(LTC3429 Only)
35
L = 4.7µH
30
25
20
V_OUT = 3.3V
15
V_OUT = 5V
10
5
40
0.1
1
10
100
OUTPUT CURRENT (mA)
0.0001
1000
3429 G03
40
0.1
1
10
100
OUTPUT CURRENT (mA)
0.0001
1000
3429 G04
0
0.9 1.4
1.9 2.4 2.9 3.4
INPUT VOLTAGE (V)
3.9 4.4
3429 G06
No Load Input Current
vs Input Voltage (LTC3429 Only)
1000
L = 4.7µH
V_OUT = 5V
100
V_OUT = 3.3V
Maximum Load Current
Capability at Output 4% Below
Regulation Point
600
L = 4.7µH
500
400
V_OUT = 3.3V
300
200
V_OUT = 5V
100
Minimum Start-Up Input Voltage
vs Load Current
1.9
1.7
CURRENT
SINK LOAD
1.5
RESISTOR
1.3
LOAD
1.1
0.9
10
0.9 1.4 1.9 2.4 2.9 3.4 3.9 4.4
INPUT VOLTAGE (V)
3429 G07
0
0.5 1 1.5 2 2.5 3 3.5 4 4.5
INPUT VOLTAGE (V)
3429 G08
0.7
0
50
100
OUTPUT CURRENT (mA)
150
3429 G09
3429fa
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