LT3579IUFD-1-PBF Просмотр технического описания (PDF) - Linear Technology
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LT3579IUFD-1-PBF Datasheet PDF : 40 Pages
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LT3579/LT3579-1
TYPICAL APPLICATION
1MHz, 5V to 12V Boost Converter can Survive Output Shorts
L1
VIN
5V
2.2μH
D1
M1
COUT1
VOUT
12V
1.7A
10μF
SW1 SW2
130k 6.3k
COUT
10μF
100k
200k
CIN
22μF
VIN
FB
FAULT
GATE
LT3579
SHDN
CLKOUT
RT
VC
D2
VIN
SYNC GND SS
47pF 8k
86.6k
0.1μF
2.2nF
CIN: 22μF, 16V, X7R, 1210
COUT1, COUT: 10μF, 25V, X7R, 1210
D1: VISHAY SSB43L
D2: CENTRAL SEMI CMDSH-3TR
L1: WÜRTH WE-PD 744771002
M1: SILICONIX SI7123DN
3579 TA03a
Efficiency and Power Loss
100
3.2
90
2.8
80
2.4
70
2
60
1.6
50
1.2
40
0.8
30
0.4
20
0
0 0.25 0.5 0.75 1 1.25 1.5 1.75 2
LOAD CURRENT (A)
3579 TA03
VOUT
10V/DIV
CLKOUT
2V/DIV
IL
2A/DIV
FAULT
5V/DIV
Output Short
10μs/DIV
3579 TA05
Transient Response with 0.7A to 1.5A to 0.7A Output Load Step
VOUT
500mV/DIV
AC COUPLED
IL
2A/DIV
ILOAD
1A/DIV
100μs/DIV
3579 TA06
35791f
31
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