ltc3851-1 Linear Technology Corporation, ltc3851-1 Datasheet - Page 25

• Manufacturer Part Number: ltc3851-1
• Description: Synchronous Step-down Switching Regulator Controller
• Manufacturer: Linear Technology Corporation

TYPICAL APPLICATIONS
15k
R
33k
R
C
C
2200pF
470pF
C
C
C
R
C
160k
0.1μF
FREQ
30.1k
R
82.5k
0.1μF
1000pF
C20
FREQ
C
330pF
C
220pF
0.1μF
C2
Figure 12. 1.8V/5A Converter from Design Example with Pulse Skip Operation
C
C2
C5
0.047μF
0.1μF
SS
C
SS
MODE/PLLIN
FREQ/PLLFLTR
RUN
TK/SS
I
V
SENSE
SENSE
TH
FB
MODE/PLLIN
FREQ/PLLFLTR
RUN
TK/SS
I
V
SENSE
SENSE
TH
FB
Figure 11. High Effi ciency 3.3V/15A Step-Down Converter
LTC3851-1
–
+
LTC3851-1
–
+
PGOOD
INTV
BOOST
PGOOD
INTV
BOOST
GND
SW
V
BG
TG
GND
CC
IN
SW
V
TG
BG
CC
IN
R
PG
R
PG
V
PULL-UP
V
4.7μF
D
CMDSH-3
PULL-UP
B
D
CMDSH05-4
4.7μF
0.1μF
0.1μF
B
C
C
B
B
4.5V TO 22V
4.5V TO 32V
V
IN
V
M1
FDS6982S
M2
FDS6982S
IN
M1
HAT2170H
M2
HAT2170H
3.3μH
L1
0.68μH
3.01k
R27
L1
+
R
0.01Ω
SENSE
+
C
22μF
25V
IN
C
22μF
IN
38511 TA02
C
C
L1: PANASONIC ETQP6F3R3HFA
R
OUT
IN
SENSE
38511 F11
: MARCON THCR70LE1H226ZT
: PANASONIC EEFUEOG151R
C
C
L1: VISHAY IHLP5050-EZERR68M01
C15
47pF
OUT
IN
: IRC LR 2010-01-R010F
: SANYO 63HVH22M
R2
32.4k
1%
R1
25.5k
1%
: SANYO 6TPE330MIL
R2
154k
1%
R1
48.7k
1%
+
LTC3851-1
+
C
150μF
6.3V
PANASONIC SP
OUT
2
V
1.8V
5A
OUT
C
330μF
OUT
2
V
3.3V
15A
OUT
25
38511f