Datasheet

LT3579/LT3579-1
37
35791fa
For more information www.linear.com/LT3579
TYPICAL APPLICATION
L2
4.7µH
L1
4.7µH
D2
D1
D3**
M1**
C
PWR2
10µF
C
VIN2
4.7µF
C
OUT1S
4.7µF
×2
C
OUT1M
4.7µF
×2
V
PWR
8V TO 16V
V
IN
3.3V TO V
PWR
V
OUT
24V
5.1A*
V
OUT1
V
OUT1
V
PWR
0.22µF
C
OUT
4.7µF
×2
C
VIN1
4.7µF
C
PWR1,
C
PWR2
: 10µF, 25V, X7R, 1210
C
VIN1,
C
VIN2
: 4.7µF, 25V, X7R, 1206
C
OUT1M,
C
OUT1S,
C
OUT
: 4.7µF, 50V, X5R, 1210
D1,
D2: CENTRAL SEMI CTLSH5-40M833
D3:
CENTRAL SEMI CTLSH1-40M563
L1,
L2: VISHAY IHLP-2525CZ-01-4R7
M1:
SILICONIX SI7461DP
C
PWR1
10µF
137k
35791 TA23
SW1 SW2
V
IN
CLKOUT
GATE
V
C
SSGND
FB
FAULT
SYNC
SHDN
RT
LT3579-1
MASTER
SW1 SW2
V
IN
CLKOUT
GATE
V
C
SSGND
FB
FAULT
SYNC
SHDN
RT
LT3579-1
SLAVE
86.6k
6.4k**
7k
2.2nF
47pF
0.22µF
5k 86.6k
21.5k500k
100k
1MHz, 2-Phase Converter Generates a 24V Output from a 8V to 16V Input and Uses Small Components
LOAD CURRENT (A)
0
20
30
50
90
EFFICIENCY (%)
POWER LOSS (W)
70
80
60
40
100
0
3
4
5
6
7
2
1
8
10.5 3.5 4 4.521.5
35791 TA24
2.5 3
V
IN
= 12V
V
IN
= 3.3V
Efficiency and Power Loss (V
PWR
= 12V)
100µs/DIV
V
OUT
1V/DIV
AC COUPLED
I
LOAD
1A/DIV
I
L1
+ I
L2
5A/DIV
35791
TA25
Transient Response with 1.5A to 3.25A to 1.5A
Output Load Step (V
PWR
= 12V and V
IN
= 3.3V)
*MAX OUTPUT CURRENT
V
PWR
= 8V V
PWR
= 12V V
PWR
= 16V
V
IN
= 3.3V TO 5V 2.4A 3.7A 5.1A
V
IN
= V
PWR
2.2A 3.1A 3.9A
**OPTIONAL FOR OUTPUT SHORT CIRCUIT PROTECTION