LTC3836 LINER [Linear Technology], LTC3836 Datasheet - Page 24

• Manufacturer Part Number: LTC3836
• Description: Dual 2-Phase, No RSENSETM Low VIN Synchronous Controller
• Manufacturer: LINER [Linear Technology]

LTC3836
APPLICATIONS INFORMATION
24
2.75V TO 4.5V
V
IN
C
X2
IN
R
IN
L1, L2: VISHAY IHLP2525CZERR 47M01
C
C
M1-M4: VISHAY Si7882DP
IN
OUT1
V
: 22μF X2, 6.3V, X5R
IN
Figure 15. 2-Phase, 550kHz, Dual Output Synchronous DC/DC Converter
with Ceramic Output Capacitors
, C
C
C
C
C
IN
OUT2
BOLD LINES INDICATE
HIGH, SWITCHING
CURRENT LINES.
KEEP LINES TO A
MINIMUM LENGTH
ITH1
ITH2A
SS
+
, 10nF
, 820pF
: TAIYO YUDEN JMK235BJ107MM X2
, 82pF
C
C
ITH1A
ITH2
C
PLLLPF
, 820pF
, 82pF
C
R
VIN
R
ITH1
R
FB2A
, 1μF
PLLLPF
R
, 15.8k
, 59k
TRACKA
R
R
Figure 14. Branch Current Waveforms
FB1A
R
ITH2
VIN
, 59k
, 11.8k
, 10Ω
, 15.8k
27
21
17
10
1
7
2
4
5
6
3
9
8
IPRG2
RUN/SS
SGND
PGOOD
V
TRACK/SS2
SYNC/FCB
V
I
IPRG1
PLLLPF
V
I
TH1
TH2
FB1
FB2
IN
LTC3836EUFD
N/C
16
SENSE1
SENSE2
BOOST1
BOOST2
N/C
28
PGND
PGND
PGND
PGND
SW1
SW2
TG1
BG1
BG2
TG2
+
+
24
26
25
20
22
23
29
19
14
15
18
12
11
13
L1
L2
C
C
D
D
B1
OUT1
OUT2
B2
V
V
+
+
C
OUT1
OUT2
C
B2
B1
R
, 0.22μF
, 0.22μF
M4
TRACKB
M1
, 12.4k
M3
M2
C
R
R
FFW1
FB1B
FB2B
, 33pF
3836 F14
, 118k
, 59k
D2
D1
L2
R
R
L1
L2
L1
3836 F15
C
X2
OUT2
C
X2
OUT1
V
1.8V
15A
V
1.2V
15A
OUT1
OUT2
3836fa