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LTC3121 Datasheet(PDF) 6 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) 6 Page - Linear Technology

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LTC3121
6
3121fa
For more information www.linear.com/LTC3121
Typical perForMance characTerisTics
Burst Mode Operation
Burst Mode Operation
to PWM Mode
PWM Mode to Burst Mode
Operation
Burst Mode Transient
Synchronized Operation
Short-Circuit Response
Efficiency vs Frequency
CAP Pin Voltage vs VOUT
VCC vs VIN
OUTPUT CURRENT (mA)
10
100
40
30
20
60
50
70
90
80
10
0
100
3121 G19
1000
fOSC = 200kHz
fOSC = 1MHz
fOSC = 3MHz
VOUT (V)
0
0
–3
–4
–5
–2
–1
–6
–7
10
6
4
2
3121 G20
8
14
12
1µs/DIV
3121 G26
VSW
5V/DIV
VPWM/SYNC
5V/DIV
SYNCHRONIZED TO 1.3MHz
20µs/DIV
3121 G23
VOUT
100mV/DIV
AC-COUPLED
VPWM/SYNC
2V/DIV
OUTPUT CURRENT = 70mA
20µs/DIV
3121 G24
VOUT
100mV/DIV
AC-COUPLED
VPWM/SYNC
2V/DIV
OUTPUT CURRENT = 70mA
5µs/DIV
3121 G22
VOUT
100mV/DIV
AC-COUPLED
VSW
10V/DIV
INDUCTOR
CURRENT
0.5A/DIV
OUTPUT CURRENT = 50mA
200µs/DIV
3121 G25
VOUT
200mV/DIV
AC-COUPLED
OUTPUT
CURRENT
100mA/DIV
10mA
10mA
100mA
VIN (V)
0
4.5
4.0
3.5
3.0
2.5
4
2
1
3121 G21
3
6
5
VIN FALLING
VIN RISING
200µs/DIV
3121 G27
VOUT
5V/DIV
INDUCTOR
CURRENT
1A/DIV
SHORT-CIRCUIT APPLIED
SHORT-CIRCUIT
REMOVED
ILOAD = 100mA



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