LTC1778 Linear Technology, LTC1778 Datasheet - Page 21

• Manufacturer Part Number: LTC1778
• Description: Wide Operating Range/ No RSENSE Step-Down Controller
• Manufacturer: Linear Technology

TYPICAL APPLICATIO S
C
C1
10k 1%
100pF
R1
1nF
C
140k
1
1%
R2
0.1 F
C
47k
R
0.1 F
140k
2.2nF
10k
R1
SS
C
C
C
220pF
R2
SS
C1
C
C2
M1, M2:
2200pF
20k
C
R
OUT
C
C
D1:
L1:
100pF
IN
C2
:
:
C
UNITED CHEMICON THCR70E1H226ZT [phone]
SANYO 16SV220M
SUMIDA CDRH127-100
FAIRCHILD FDS6680A
DIODES, INC. B340A
C2
1
2
3
4
5
6
7
8
R
1.5M
1%
ON2
RUN/SS
V
V
FCB
I
SGND
I
V
TH
ON
1.6M
ON
RNG
FB
R
U
ON
LTC1778-1
R
1.5M
1%
ON1
1
2
3
4
5
6
7
8
EXTV
INTV
BOOST
RUN/SS
V
V
FCB
I
SGND
I
V
Single Inductor, Positive Output Buck/Boost
PGND
TH
ON
ON
RNG
FB
SW
V
BG
TG
CC
CC
LTC1778-1
IN
16
15
14
13
12
11
10
9
EXTV
INTV
BOOST
PGND
SW
V
BG
TG
CC
CC
IN
12V/5A at 300kHz
C
0.22 F
CMDSH-3
B
16
15
14
13
12
11
10
9
PGND
C
4.7 F
C
0.1 F
[phone]
[phone]
[phone]
[phone]
VCC
F
D
B
1
R
F
C
0.22 F
+
CMDSH-3
B
C
4.7 F
C
0.1 F
1
R
VCC
F
D
F
B
C
C
L1: SCHOTT 36835-1
IN
OUT
M1
IRF7811A
M2
IRF7811A
: MARCON THER70EIH226ZT
: AVX TPSV107M020R0085
L1 4.8 H
B340A
D1
M1
M2
L1 10 H
C
22 F
50V
IN
2
LTC1778/LTC1778-1
D1
M3
Si4888
IR 12CWQ03FN
1778 TA05
+
D2
C
22 F
50V
C
220 F
16V
18V
12V
1778 TA04
V
6V
IN
OUT
+
IN
I
3.3A
V
14V TO 28V
V
12V
5A
OUT
6A
5A
IN
OUT
C
100 F
20V
OUT
6
V
6V TO 18V
V
12V
IN
OUT
21
1778fa