Datasheet

LT3579/LT3579-1
32
35791fa
For more information www.linear.com/LT3579
TYPICAL APPLICATION
Efficiency and Power Loss
1MHz, 5V to 12V Boost Converter can Survive Output Shorts
Output Short
Transient Response with 0.7A to 1.5A to 0.7A Output Load Step
LOAD CURRENT (A)
0
20
EFFICIENCY (%)
80
90
70
60
50
40
30
100
0
POWER LOSS (W)
2.4
2.8
2
1.6
1.2
0.8
0.4
3.2
0.25 1 1.25 1.5 1.75 20.5
35791 TA03
0.75
10µs/DIV
V
OUT
10V/DIV
CLKOUT
2V/DIV
I
L
2A/DIV
FAULT
5V/DIV
35791
TA05
100µs/DIV
V
OUT
500mV/DIV
AC COUPLED
I
L
2A/DIV
I
LOAD
1A/DIV
35791
TA06
V
IN
5V
L1
2.2µH
D1
C
OUT1
10µF
C
IN
22µF
V
OUT
12V
1.7A
C
OUT
10µF
C
IN
: 22µF, 16V, X7R, 1210
C
OUT1
, C
OUT
: 10µF, 25V, X7R, 1210
D1: VISHAY SSB43L
D2: CENTRAL SEMI CMDSH-3TR
L1: WÜRTH WE-PD 744771002
M1: SILICONIX SI7123DN
100k
35791 TA03a
130k 6.3k
8k
2.2nF0.1µF
47pF
86.6k
200k
V
IN
M1
D2
SW1 SW2
V
IN
FB
CLKOUT
V
C
SSGND
GATEFAULT
SYNC
RT
SHDN
LT3579