LTC3836 LINER [Linear Technology], LTC3836 Datasheet - Page 25

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

APPLICATIONS INFORMATION
3.3V
V
IN
C
X2
IN
100
L1, L2: VISHAY IHLP2525CZERR 47M01
C
C
M1, M2: FAIRCHILD FDS6898A
90
80
70
60
50
40
30
20
10
Figure 16b. Effi ciency vs Load Current
IN
OUT1
0
10
: 22μF X2, 6.3V, X5R
, C
C
OUT2
C
ITH1
SS
, 10nF
, 470pF
: SANYO POSCAP , 2R5TPE330M
C
C
LOAD CURRENT (mA)
ITH2A
CHANNEL 1
ITH2
100
1.5V
, 470pF
, 47pF
Figure 16a. 2-Phase, 750kHz, Dual Output Synchronous DC/DC Converter
CHANNEL 2
C
C
R
R
VIN
ITH1A
FB1A
FB2A
1.1V
, 1μF
, 59k, 1%
, 59k, 1%
, 47pF
1000
R
R
R
ITH1
ITH2
C
VIN
SS2
, 64.9k
, 10Ω
, 64.9k
, 10nF
10000
3836 F16b
27
21
17
10
3
1
7
2
4
5
6
9
8
IPRG2
RUN/SS
SGND
PGOOD
V
TRACK/SS2
SYNC/FCB
V
IPRG1
PLLLPF
V
I
I
TH1
TH2
FB1
FB2
IN
LTC3836EUFD
N/C
16
SENSE1
SENSE2
BOOST1
BOOST2
N/C
28
PGND
PGND
PGND
PGND
SW1
SW2
BG1
BG2
TG1
TG2
+
+
24
26
25
20
22
23
29
19
14
15
18
12
11
13
D
D
AC COUPLED
B1
B2
200mV/DIV
5A/DIV
5A/DIV
5A/DIV
C
I
C
V
LOAD
B2
B1
OUT
I
I
, 0.22μF
L1
L2
, 0.22μF
V
V
I
LOAD
IN
OUT
M2
Figure 16c. Load Step
= 3.3V
M1
= 1.25V
= 10A TO 15A
R
FB1B
C
C
FFW1
FFW2
49.9k, 1%
, 88.7k, 1%
R
40μs/DIV
, 82pF
FB2B
, 82pF
D2
D1
L2
L1
LTC3836
+
+
3836 F16
3836 F17c
C
OUT2
C
OUT1
25
V
1.1V
5A
V
1.5V
5A
OUT2
OUT1
3836fa