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LTC3499 Datasheet(PDF) 4 Page - Linear Technology

Part # LTC3499
Description  750mA Synchronous Step-Up DC/DC Converters with Reverse-Battery Protection
PDF  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3499 Datasheet(HTML) 4 Page - Linear Technology

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LTC3499/LTC3499B
3499f
4
TYPICAL PERFOR A CE CHARACTERISTICS
2-Cell to 5V Efficiency
vs Load Current (LTC3499 Only)
TA = 25°C unless noted.
LOAD CURRENT (mA)
0.1
40
50
60
70
80
90
100
0.1
1
10
100
1000
10000
100000
1
10
100
1000
3499 G01
VIN = 3.2V
VIN = 2.4V
VIN = 1.8V
POWER LOSS
EFFICIENCY
LOAD CURRENT (mA)
0.1
70
80
100
100
3499 G03
60
50
1
10
1000
40
30
90
100
1000
100000
10
1
0.1
10000
VIN = 4.2V
VIN = 3.6V
VIN = 3V
POWER LOSS
EFFICIENCY
Li-Ion to 5V Efficiency
vs Load Current (LTC3499 Only)
LOAD CURRENT (mA)
0.1
40
50
60
70
80
90
100
0.1
1
10
100
1000
10000
100000
1
10
100
1000
3499 G02
VIN = 3V
VIN = 2.4V
VIN = 1.8V
POWER LOSS
EFFICIENCY
Maximum Output Current
Capability vs VIN
No Load Input Current vs VIN
(LTC3499 Only)
Burst Mode Quiescent Current
vs Temperature (LTC3499 Only)
Current Limit Accuracy
vs Temperature
Burst Mode Output Current
Threshold vs Input Voltage
(LTC3499 Only)
2-Cell to 3.3V Efficiency
vs Load Current (LTC3499 Only)
TEMPERATURE (
°C)
–50
1.00
1.01
1.02
25
75
3499 G04
0.99
0.98
0.97
0.96
–25
0
50
1.03
1.04
100
INPUT VOLTAGE (V)
1.8
0
10
20
30
40
60
2.3
2.8
3.3
3.8
3499 G05
4.3
4.8
50
VOUT = 5V
VIN (V)
1.5
400
500
600
5.5
3499 G06
300
200
0
2.5
3.5
4.5
100
800
700
VOUT = 3.3V
VOUT = 5V
VIN > VOUT
VIN > VOUT
VIN (V)
1.5
0
20
60
80
100
200
140
2.5
3.5
3499 G07
40
160
180
120
4.5
5.5
VOUT = 3.3V
VOUT = 5V
TEMPERATURE (
°C)
–50
0
5
10
15
20
30
–25
025
50
3499 G08
75
100
25
LOAD CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3499 G17
0
1
VIN = 3.2V
VIN = 2.4V
VIN = 1.8V
2-Cell to 5V Efficiency
vs Load Current (LTC3499B Only)



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