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LTC3121 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC3121
Description  15V, 1.5A Synchronous Step-Up DC/DC Converter with Output Disconnect
PDF  26 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3121 Datasheet(HTML) 5 Page - Linear Technology

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background image
LTC3121
5
3121fa
For more information www.linear.com/LTC3121
Typical perForMance characTerisTics
Burst Mode Maximum Output
Current vs VIN
Burst Mode No Load Input Current
vs VIN
Burst Mode Quiescent Current
Change vs Temperature
SD Pin Threshold
Frequency vs RT
Frequency Accuracy
PWM Mode Maximum Output
Current vs VIN
Peak Current Limit Change
vs Temperature
PWM Operation No Load Input
Current vs VIN
VIN (V)
0.5
0.8
0.6
0.4
1.4
1.2
1.0
0.2
0
3.5
4.5
1.5
3121 G10
2.5
5.5
VOUT = 5V
VOUT = 7.5V
VOUT = 12V
VIN (V)
0
70
40
30
20
60
50
10
0
4
5
2
1
3121 G12
3
6
VOUT = 5V
VOUT = 7.5V
VOUT = 12V
VIN, FALLING (V)
0.5
350
200
150
100
300
250
50
0
4.5
2.5
1.5
3121 G13
3.5
5.5
VOUT = 2.2V
VOUT = 5V
VOUT = 7.5V
VOUT = 12V
VIN, FALLING (V)
0.5
10000
1000
100
10
4.5
2.5
1.5
3121 G14
3.5
5.5
VOUT = 5V
VOUT = 7.5V
VOUT = 12V
TEMPERATURE (°C)
–50
75
60
45
30
15
0
–15
70
110
–10
3121 G15
30
150
TEMPERATURE (°C)
–50
2
1
0
–1
–2
–3
–4
70
110
–10
3121 G11
30
150
RT (k)
0
3.0
2.0
1.5
1.0
2.5
0.5
0
12
8
6
4
10
2
0
400
200
100
3121 G17
300
600
500
FREQUENCY
PERIOD
VIN FALLING (V)
0
4
2
1
0
–1
3
–2
–3
–4
4
2
1
3121 G18
3
6
5
VOUT = 15V
VOUT = 3.6V
VOUT = 2.2V
1s/DIV
3121 G16
VOUT
5V/DIV
VSD
500mV/DIV
900mV
400mV



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