LTC3851 LINER [Linear Technology], LTC3851 Datasheet - Page 25

• Manufacturer Part Number: LTC3851
• Description: Synchronous Step-Down Switching Regulator Controller
• Manufacturer: LINER [Linear Technology]

TYPICAL APPLICATIONS
R
1k
47pF
33k
R
C
C
3300pF
470pF
C
C
C
C
R
0.1μF
80k
FREQ
1000pF
R
0.1μF
80k
FREQ
0.22μF
13k
C
220pF
0.1μF
C5
C
C2
C
100pF
C2
SS
0.1μF
C
SS
1.8V/5A Converter from Design Example with Pulse Skip Operation
MODE/PLLIN
FREQ/PLLFLTR
RUN
TK/SS
I
V
SENSE
SENSE
TH
FB
Figure 11. High Effi ciency 3.3V/15A Step-Down Converter
MODE/PLLIN
FREQ/PLLFLTR
RUN
TK/SS
I
V
SENSE
SENSE
TH
FB
LTC3851
–
+
LTC3851
–
+
BOOST
INTV
GND
I
SW
LIM
V
INTV
BG
BOOST
TG
CC
IN
GND
I
SW
V
LIM
TG
BG
CC
IN
+
+
4.7μF
D
CMDSH-3
B
0.1μF
C
D
CMDSH-4E
4.7μF
B
B
0.1μF
4.5V TO 22V
C
B
V
4V TO 38V
IN
M1
Si4412DY
M2
Si4410DY
V
MBRS140T3
IN
M1
IRF7478PBF
M2
IRF7478PBF
3.3μH
CMSH3-40M
L1
0.68μH
R27
10k
L1
C
22μF
50V
CER
IN
R
0.01Ω
SENSE
C
180μF
IN
3851 TA02
C
C
L1: PANASONIC ETQP6F3R3HFA
R
3851 TA03
OUT
IN
SENSE
C
C
L1: SUMIDA CEP125-0R68
C15
47pF
: MARCON THCR70LE1H226ZT
OUT
IN
R2
32.4k
1%
R1
25.5k
1%
: PANASONIC EEFUEOG151R
: SANYO 80UK150K
: IRC LR 2010-01-R010F
: SANYO 2R5TPE330M9
R2
62.5k
1%
R1
20k
1%
+
C
150μF
6.3V
PANASONIC SP
+
OUT
2
LTC3851
V
1.8V
5A
C
330μF
OUT
OUT
2
V
3.3V
15A
OUT
25
3851f