Datasheet

LTC3775
29
3775fa
8V to 36V Input, 2.5V/10A Output at 500kHz
L1
1.2μH
C
OUT
330μF
4V
s3
C
IN1
330μF
35V
V
IN
8V TO 36V
V
OUT
2.5V
10A
3775 TA03
C
VCC
4.7μF
C
B
0.1μF
C2
330pF
C3
1500pF
C1
2200pF
R
ILIMB
133k
R
SET
39.2k
R2
15k
R
B
3.16k
C
OUT
: SANYO 4TPD330M
D
B
: CMDSH4E
L1: TOKO FDA1254-1R2M
Q
B
,Q
T
: INFINEON BSZ097N04LS
R
A
10k
R3
390Ω
D
B
R4
43.2k
R
ILIMT
464Ω
R
SENSE
0.003Ω
R5
10k
C
SS
0.01μF
I
LIMT
Q
T
C
F
220pF
Q
B
V
IN
LTC3775
SGND
SENSE
BOOST
I
LIMB
INTV
CC
SS
BG
PGND
MODE/SYNC
COMP
TG
SW
FREQ
RUN/SHDN
FB
+
+
Load Step
Effi ciency and Power Loss
vs Load Current
Start-Up
I
L
10A/DIV
V
OUT(AC)
100mV/DIV
50μs/DIV
3775 TA03c
V
IN
= 12V
V
OUT
= 2.5V
LOAD = 0A TO 10A TO 0A
MODE = 0V
SW FREQ = 500kHz
LOAD CURRENT (A)
0.01
40
EFFICIENCY (%)
POWER LOSS (W)
50
60
70
80
0.1 1 10
3775 TA03b
30
20
10
0
90
100
4
3
2
1
0
5
V
IN
= 12V
V
OUT
= 2.5V
CONTINUOUS MODE
SW FREQ = 500kHz
EFFICIENCY
POWER LOSS
I
L
5A/DIV
V
OUT
1V/DIV
V
SS
1V/DIV
2ms/DIV
3775 TA03d
V
IN
= 12V
V
OUT
= 2.5V
CSS = 0.01μF
MODE = 0V
SW FREQ = 500kHz
SWITCHOVER
FROM PULSE-
SKIPPING TO
CONTINUOUS
MODE
TYPICAL APPLICATIONS