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LTC3421 Datenblatt(PDF) 4 Page - Linear Technology

Teilenummer LTC3421
Bauteilbeschribung  3A, 3MHz Micropower Synchronous Boost Converter with Output Disconnect
PDF  16 Pages
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Hersteller  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3421 Datenblatt(HTML) 4 Page - Linear Technology

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LTC3421
4
3421f
TYPICAL PERFOR A CE CHARACTERISTICS
Single Cell to 3.3V Efficiency
OUTPUT CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3421 G01
0
1
Burst Mode OPERATION
VIN = 1.5V
VOUT = 3.3V
fOSC = 1MHz
VIN = 1V
VIN = 1.2V
OUTPUT CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3421 G02
0
1
Burst Mode OPERATION
VIN = 3V
VOUT = 3.3V
fOSC = 1MHz
VIN = 2.4V
VIN = 2V
OUTPUT CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3421 G03
0
1
Burst Mode
OPERATION
VOUT = 5V
fOSC = 1MHz
VIN = 4.2V
VIN = 3.6V
VIN = 2.7V
2-Cell to 3.3V Efficiency
Li-Ion to 5V Efficiency
Burst Mode Operation
Load Transient Response
Inrush Current Control
Efficiency vs Frequency
Efficiency vs VIN
Start-Up Voltage vs Output Current
OUTPUT CURRENT (mA)
1
40
50
60
70
80
10
100
1000
3421 G07
30
20
10
0
90
100
VIN = 2.4V
VOUT = 3.3V
f = 300kHz
f = 3MHz
f = 1MHz
INPUT VOLTAGE (V)
1
0
10
30
40
50
100
70
2
3
3.5
3421 G08
20
80
90
60
1.5
2.5
4
4.5
5
VIN > VOUT
PMOS LDO MODE
VOUT = 3.3V
IOUT = 200mA
OUTPUT CURRENT (mA)
0
1.00
1.05
1.10
200
3421 G09
0.95
0.90
0.80
50
100
150
0.85
1.20
1.15
VOUT
50mV/DIV
AC COUPLED
INDUCTOR
CURRENT
0.5A/DIV
SW
2.5
µs/DIV
3421 G04
VOUT
100mV/DIV
AC COUPLED
600mA
VIN = 2.4V
2.5ms/DIV
3421 G05
VOUT = 3.3V
COUT = 44µF
50mA
IOUT
VOUT
1V/DIV
INDUCTOR
CURRENT
0.5A/DIV
VIN = 0V TO 2.4V 500µs/DIV
3421 G06
COUT = 44µF
(TA = 25°C, unless otherwise specified)



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