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LTC3554EPD Datasheet(PDF) 8 Page - Linear Technology

Part # LTC3554EPD
Description  Micropower USB Power Manager with Li-Ion Charger and Two Step-Down Regulators
PDF  36 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3554EPD Datasheet(HTML) 8 Page - Linear Technology

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LTC3554
8
3554f
TYPICAL PERFORMANCE CHARACTERISTICS
Burst Mode
® BVIN Supply
Current Per Enabled Step-Down
Switching Regulator
Standby Mode BVIN Supply
Current Per Enabled Step-Down
Switching Regulator
Oscillator Frequency
vs Temperature
Step-Down Switching Regulator 1
3.3V Output Efficiency vs IOUT1
Step-Down Switching Regulator 2
1.8V Output Efficiency vs IOUT2
TA = 25°C, unless otherwise specified.
Burst Mode is a registered trademark of Linear Technology Corporation.
Step-Down Switching Regulator 1
2.5V Output Efficiency vs IOUT1
Step-Down Switching Regulator 2
1.2V Output Efficiency vs IOUT2
Switching from Suspend Mode to
500mA Mode
VBAT = 3.75V
IOUT = 50mA
RPROG = 2k
3554 G15
1ms/DIV
5V
5V
SUSP
VOUT
0
0
0A
0A
IBUS
0.5A/DIV
IBAT
0.5A/DIV
Switching from 100mA Mode to
500mA Mode
VBAT = 3.75V
IOUT = 50mA
RPROG = 2k
3554 G14
1ms/DIV
5V
HPWR
0
0A
0A
IBUS
0.5A/DIV
IBAT
0.5A/DIV
TEMPERATURE (°C)
–75 –50 –25
25
50
75 100
150
125
0
1.9
2.1
2.2
2.4
2.6
2.5
2.3
3554 G16
2.0
2.7V
3.8V
5.5V
IOUT1 (mA)
0.01
0.1
0
70
100
1
10
100
1000
3554 G24a
60
50
40
30
20
10
80
90
FSEL = L
STBY = L
3.8V
5V
IOUT2 (mA)
0.01
0.1
0
70
100
1
10
100
1000
3554 G25
60
50
40
30
20
10
80
90
FSEL = L
STBY = L
3.8V
5V
BVIN SUPPLY VOLTAGE (V)
2.5
3
4
4.5
5.5
5
3.5
0
10
15
25
35
30
20
3554 G17
5
NO LOAD
STBY = L
–45°C
25°C
90°C
BVIN SUPPLY VOLTAGE (V)
2.5
3
4
4.5
5.5
5
3.5
0
1.0
1.5
2.5
3.0
2.0
3554 G18
0.5
NO LOAD
STBY = H
–45°C
25°C
90°C
IOUT1 (mA)
3554 G31
0.01
0.1
100
1000
10
1
0
20
30
80
40
50
60
90
100
70
10
FSEL = L
STBY = L
3.8V
5V
IOUT2 (mA)
3554 G32
0.01
0.1
100
1000
10
1
0
20
30
80
40
50
60
90
100
70
10
FSEL = L
STBY = L
3.8V
5V



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