LTC3836 LINER [Linear Technology], LTC3836 Datasheet - Page 26

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

TYPICAL APPLICATIONS
LTC3836
26
2.75V TO
4.2V
V
500kHz
IN
C
X3
IN
100
90
80
70
60
50
40
30
20
Figure 17b. Effi ciency vs Load Current
L1, L2: TOKO 0.47μF FDV0630-R47M=P3
C
C
M1, M2, M3, M4: SILICONIX Si7882DP
10
IN
OUT
: 22μF X3, 6.3V, X5R
V
: AVX CORECAP 560μF , 2.5V
IN
NPV V567M002 R003
Figure 17a. Single Output, High Current Application with External Frequency Synchronization
C
C
= 3.6V
ITH2A
ITH1
100
, 2700pF
, 100pF
LOAD CURRENT (mA)
C
C
PLLLPF
SS
C
ITH1A
, 10nF
V
IN
1000
, 0.015μF
, 100pF
= 2.7V
C
R
VIN
V
ITH1
IN
, 10μF
R
= 4.2V
R
, 1.37k
TRACKA
R
FB1A
10000
PLLLPF
R
VIN
, 61.9k
, 61.9k
, 10Ω
, 15k
100000
3836 F17b
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
AC COUPLED
200mV/DIV
D
D
B2
B1
5A/DIV
5A/DIV
5A/DIV
I
V
LOAD
OUT
I
I
L1
L2
C
C
V
V
I
B2
B1
LOAD
IN
OUT
R
, 0.22μF
Figure 17c. Load Step
, 0.22μF
M1
M4
= 3.3V
TRACKB
= 1.25V
= 10A TO 15A
, 68.1k
M3
40μs/DIV
M2
C
R
FFW1
FB1B
, 120pF
, 66.5k
D2
B320A
D1
B320A
L2
L1
3836 F17c
C
OUT
3836 F17
V
1.25V
20A
OUT
3836fa