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LTC3836EGN#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30
LTC3836
25
3836fb
APPLICATIONS INFORMATION
Figure 16a. 2-Phase, 750kHz, Dual Output Synchronous DC/DC Converter
Figure 16b. Effi ciency vs Load Current Figure 16c. Load Step
LOAD CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
0
80
50
70
60
40
10 1000 10000
3836 F16b
100
CHANNEL 1
1.5V
CHANNEL 2
1.1V
40μs/DIV
V
OUT
200mV/DIV
AC COUPLED
I
L1
5A/DIV
I
L2
5A/DIV
I
LOAD
5A/DIV
3836 F17c
V
IN
= 3.3V
V
OUT
= 1.25V
I
LOAD
= 10A TO 15A
L1, L2: VISHAY IHLP2525CZERR 47M01
C
IN
: 22μF X2, 6.3V, X5R
C
OUT1
, C
OUT2
: SANYO POSCAP, 2R5TPE330M
M1, M2: FAIRCHILD FDS6898A
C
ITH2A
, 47pF
R
ITH1
, 64.9k
C
ITH1
, 470pF
C
ITH1A
, 47pF
D
B1
R
FB1A
, 59k, 1%
L1
L2
SGND
PLLLPF
IPRG2
IPRG1
V
FB1
I
TH1
SW1
BOOST1
BOOST2
V
IN
PGOOD
V
FB2
N/C N/C
16 28
TRACK/SS2
I
TH2
TG2
LTC3836EUFD
PGND
TG1
SYNC/FCB
BG1
PGND
PGND
SENSE1
+
RUN/SS
BG2
PGND
SW2
SENSE2
+
C
SS2
, 10nF
C
SS
, 10nF
V
IN
3.3V
V
OUT1
1.5V
5A
V
OUT2
1.1V
5A
C
IN
X2
C
VIN
, 1μF
C
ITH2
, 470pF C
B2
, 0.22μF
C
OUT2
C
OUT1
3836 F16
R
VIN
, 10Ω
R
FB2A
, 59k, 1%
R
ITH2
, 64.9k
C
B1
, 0.22μF
D
B2
D2
D1
R
FB1B
, 88.7k, 1%
C
FFW1
, 82pF
R
FB2B
49.9k, 1%
C
FFW2
, 82pF
M2
5
4
3
27
1
2
6
10
8
7
9
21
17
26
24
13
18
19
20
22
29
23
25
15
14
11
12
M1
+
+
LTC3836
26
3836fb
TYPICAL APPLICATIONS
Figure 17a. Single Output, High Current Application with External Frequency Synchronization
Figure 17b. Effi ciency vs Load Current Figure 17c. Load Step
LOAD CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
80
50
70
60
40
10 1000 10000 100000
3836 F17b
100
V
IN
= 4.2V
V
IN
= 2.7V
V
IN
= 3.6V
40μs/DIV
V
OUT
200mV/DIV
AC COUPLED
I
L1
5A/DIV
I
L2
5A/DIV
I
LOAD
5A/DIV
3836 F17c
V
IN
= 3.3V
V
OUT
= 1.25V
I
LOAD
= 10A TO 15A
L1, L2: TOKO 0.47RF FDV0630-R47M=P3
C
IN
: 22RF X3, 6.3V, X5R
C
OUT
: AVX CORECAP 560RF, 2.5V
NPV V567M002 R003
M1, M2, M3, M4: SILICONIX Si7882DP
C
ITH2A
, 100pF
R
ITH1
, 1.37k
C
ITH1
, 2700pF
C
ITH1A
, 100pF
D
B1
R
FB1A
, 61.9k
L1
L2
SGND
PLLLPF
IPRG2
IPRG1
V
FB1
I
TH1
SW1
BOOST1
BOOST2
V
IN
PGOOD
V
FB2
N/C N/C
16 28
TRACK/SS2
I
TH2
TG2
LTC3836EUFD
PGND
TG1
SYNC/FCB
BG1
PGND
PGND
SENSE1
+
RUN/SS
BG2
PGND
SW2
SENSE2
+
R
TRACKA
, 61.9k
R
PLLLPF
, 15k
C
PLLLPF
, 0.015RF
C
SS
, 10nF
V
IN
2.75V TO
4.2V
500kHz
V
OUT
1.25V
20A
C
IN
X3
C
VIN
, 10RF
C
B2
, 0.22RF
C
OUT
3836 F17
R
VIN
, 10<
C
B1
, 0.22RF
D
B2
M3
D1
B320A
D2
B320A
R
TRACKB
, 68.1k
R
FB1B
, 66.5k
C
FFW1
, 120pF
M2
5
4
3
27
1
2
6
10
8
7
9
21
17
26
24
13
18
19
20
22
29
23
25
15
14
11
12
M1
M4
+
LTC3836
27
3836fb
GN Package
28-Lead Plastic SSOP (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1641)
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
.386 – .393*
(9.804 – 9.982)
GN28 (SSOP) 0204
12
3
4
5
6
7
8 9 10 11 12
.229 – .244
(5.817 – 6.198)
.150 – .157**
(3.810 – 3.988)
202122232425262728
19
18
17
13 14
16
15
.016 – .050
(0.406 – 1.270)
.015 ± .004
(0.38 ± 0.10)
×
45
°
0
°
– 8
°
TYP
.0075 – .0098
(0.19 – 0.25)
.0532 – .0688
(1.35 – 1.75)
.008 – .012
(0.203 – 0.305)
TYP
.004 – .0098
(0.102 – 0.249)
.0250
(0.635)
BSC
.033
(0.838)
REF
.254 MIN
RECOMMENDED SOLDER PAD LAYOUT
.150 – .165
.0250 BSC.0165
±
.0015
.045
±
.005
INCHES
(MILLIMETERS)
NOTE:
1. CONTROLLING DIMENSION: INCHES
2. DIMENSIONS ARE IN
3. DRAWING NOT TO SCALE
* DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
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LTC3836EGN#PBF

Mfr. #:
Buy LTC3836EGN#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators Low Input Voltage 2-Phase Synch Controller w/ Tracking
Lifecycle:
New from this manufacturer.
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