LTC3879 Linear Technology Corporation, LTC3879 Datasheet - Page 22

• Manufacturer Part Number: LTC3879
• Description: Wide Operating Range No RSENSE Step-Down Controller
• Manufacturer: Linear Technology Corporation

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LTC3879
APPLICATIONS INFORMATION
TYPICAL APPLICATIONS
22
10.0k
10.0k
R
R
FB1
TR1
10.0k
R1
330pF
V
C
R
10.0k
MASTER
C1
FB2
R
10.0k
57.6k
BOLD LINES INDICATE HIGH CURRENT PATHS
TR2
R2
15k
R
R1
R2
C
C
C
SS
C1
C
470pF
PL
R
100k
C
47pF
R
C
C2
PG
4.5V to 14V Input, 1.2V/20A Output at 300kHz with Coincident Rail Tracking
R
576k
ON
1
2
3
4
5
6
7
8
TRACK/SS
PGOOD
V
MODE
I
SGND
I
V
TH
ON
C
RNG
FB
C2
R
ON
Figure 11. LTC3879 Layout Diagram Without Ground Plane
LTC3879
1
2
3
4
5
6
7
8
TRACK/SS
PGOOD
V
MODE
I
SGND
I
V
TH
ON
RNG
FB
BOOST
PGND
INV
RUN
LTC3879
SW
V
TG
BG
CC
IN
16
15
14
13
12
11
10
9
BOOST
INTV
PGND
RUN
SW
V
BG
TG
CC
4.7μF
C
IN
VCC
16
15
14
13
12
11
10
9
C
0.22μF
B
CMDSH-3
C
0.1μF
D
F
B
+
C
C
D
VCC
B
B
1Ω
R
F
C
F
R
F
C
C
C
L1: PULSE PA0513.441NLT
IN1
OUT1
OUT2
M1
RJK0305DPB
M2
RJK0330DPB
: TDK C3225X5R1C106MT 2
M2
: SANYO 2R5TPE330M9 3
: MURATA GRM31CR60J107ME39 2
C
M1
OUT
L
C
0.44μH
C
330μF
IN
10μF
OUT1
2.5V
C
L1
16V
IN1
2
3
3879 F11
+
+
C
100μF
6.3V
C
180μF
16V
OUT2
2
IN2
+
–
–
+
V
V
IN
OUT
3879 TA02
V
4.5V TO 14V
V
1.2V
20A
IN
OUT
3879f