Datasheet

LT3844
22
3844fb
TYPICAL APPLICATIONS
Two Phase Spread Spectrum 24V Input to 12V, 6A Output
V
IN
SHDN
C
SS
BURST_EN
V
FB
V
C
SYNC
f
SET
BOOST
TG
SW
V
CC
PGND
SENSE
+
SENSE
–
SGND
LT3844
R5
49.9k
R21
49.9k
R22
10k
V
OUT
12V
6A
C2
680pF
C13
47pF
R4
4.99k
C1
2200pF
C5
0.22μF
16V
C4
2.2μF
L1
15μH
C
OUT
22μF
25V
R
SENSE
0.02Ω
R1
10k
C
IN
6.8μF
50V
s3
R2
87.5k
R3
3M
R6
270k
R13
3M
R16
270k
D1
D1a
BAV70
D11a
BAV70
D1b
BAV70
M1
V
IN
SHDN
C
SS
BURST_EN
V
FB
V
C
SYNC
f
SET
BOOST
TG
SW
V
CC
PGND
SENSE
+
SENSE
–
SGND
LT3844
3844 TA04
R15
49.9k
C11
2200pF
C15
0.22μF
16V
C14
2.2μF
L1
15μH
R
SENSE
0.02Ω
R11
10k
R12
87.5k
D11
M11
L1, L11 = VISHAY, IHLP5050FD-01
M1, M11 = VISHAY, Si7850DP
D1, D11 = DIODES INC, PDS760
C
OUT
= TDK, C4532X7R1E226K
C
IN
= TDK, C4532X7R1H685K
V+
DIV
PH
OUT1
SET
MOD
GND
OUT2
OUT V
IN
GND
LTC6902
LT1121-5
V
IN
18V
TO
36V
D11b
BAV70
4
1
3
2
5
6
7
8
16
15
14
13
12
11
10
9
4
1
1
3
3
2
2
5
6
7
8
16
15
14
13
12
11
10
9
10
9
8
5
1
2
3
4
SYNC1
SYNC2
SYNC1
SYNC2