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| LTC3429 Datasheet, PDF (4/12 Pages) Linear Technology – 600mA, 500kHz Micropower Synchronous Boost Converter with Output Disconnect | |||
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LTC3429/LTC3429B
TYPICAL PERFOR A CE CHARACTERISTICS (TA = 25°C unless otherwise specified)
Output Voltage vs Temperature
3.44
VIN = 1.5V
3.40 IOUT = 30mA
3.36
3.32
3.28
3.24
3.20
3.16
â60 â40 â29 0 20 40 60
TEMPERATURE (°C)
80 100
3429 G10
SW Pin Fixed Frequency
Continuous Mode Operation
Normalized Oscillator Frequency
vs Temperature
1.02
1.00
0.98
0.96
0.94
0.92
â60 â40 â20 0 20 40 60
TEMPERATURE (°C)
80 100
3429 G11
SW Pin Discontinuous Mode
Antiringing Operation
Burst Mode Quiescent Current
vs Temperature (LTC3429 Only)
40
35
VOUT = 5V
30
25
VOUT = 3.3V
20
15
10
5
0
â60 â40 â20 0 20 40 60
TEMPERATURE (°C)
80 100
3429 G12
Fixed Frequency and Burst Mode
Operation (LTC3429 Only)
VSW
1V/DIV
VIN = 1.5V
VOUT = 3.3V
IOUT = 50mA
L = 10µH
COUT = 10µF
CPL = 150pF
200ns/DIV
VSW
1V/DIV
3429 G13
VIN = 1.5V
VOUT = 3.3V
IOUT = 20mA
L = 10µH
COUT = 10µF
CPL = 150pF
200ns/DIV
VOUT
100mV/DIV
AC-COUPLED
50mA
IOUT
120µA
3429 G14
VIN = 1.5V
5ms/DIV
VOUT = 3.3V
IOUT = 120µA TO 50mA STEP
L = 10µH
COUT = 10µF
CPL = 150pF
Output Voltage Transient
Response
Inrush Current Control
and Soft-Start
Inrush Current Control
and Soft-Start
3429 G15
VOUT
100mV/DIV
AC-COUPLED
90mA
IOUT
40mA
VIN = 1.5V
100µs/DIV
VOUT = 3.3V
IOUT = 40mA TO 90mA STEP
L = 10µH
COUT = 10µF
CPL = 150pF
4
VOUT
1V/DIV
INDUCTOR
CURRENT
100mA/DIV
3429 G16
VIN = 1.5V
VOUT = 3.3V
IOUT = 10mA
L = 4.7µH
COUT = 10µF
CPL = 100pF
500µs/DIV
VOUT
2V/DIV
INDUCTOR
CURRENT
200mA/DIV
3429 G17
VIN = 2.5V
VOUT = 5V
IOUT = 50mA
L = 4.7µH
COUT = 10µF
CPL = 100pF
2ms/DIV
3429 G18
3429fa
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