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LTC3827IUH#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36
LTC3827
31
3827ff
TYPICAL APPLICATION
Figure 13. High Effi ciency Dual 8.5V/3.3V Step-Down Converter
C
IN1
10µF
C
INT2
1µF
D2
D1
C1
1nF
R
B1
215k
3827 TA02
C
SS1
0.01µF
C
ITH1
1200pF
R
ITH1
9.53k
R
A1
68.1k
C
ITH1A
150pF
C2
1nF
R
B2
215k
C
SS2
0.01µF
C
ITH2
560pF
R
ITH2
35.7k
R
A2
22.1k
C
ITH2A
100pF
C
B2
0.47µF
100k
C
INT1
4.7µF
C
OUT2
150µF
C
B1
0.47µF
MTOP2
MBOT2
MTOP1
MBOT1
L2
7.2µH
R
SNS2
12mΩ
V
OUT1
3.3V
5A
V
IN
12V
V
OUT2
8.5V
3.5A
L1
3.3µH
R
SNS1
12mΩ
C
IN2
10µF
C
OUT1
150µF
39pF
39pF
MTOP1, MTOP2, MBOT1, MBOT2: Si7848DP
L1: CDEP105-3R2M
L2: CDEP105-7R2M
C
OUT1
, C
OUT2
: SANYO 10TPD150M
I
TH1
V
FB1
SENSE1
+
SENSE1
–
PLLLPF
PHASMD
CLKOUT
PLLIN/MODE
SGND
RUN1
RUN2
SENSE2
–
SENSE2
+
V
FB2
I
TH2
TRACK/SS2
TRACK/SS1
PGOOD2
PGOOD1
TG1
SW1
BOOST1
BG1
V
IN
PGND
EXTV
CC
INTV
CC
BG2
BOOST2
SW2
TG2
FOLDDIS
LTC3827
+
100k
0
20
40
60
80
100
10
30
50
70
90
LOAD CURRENT (mA)
EFFICIENCY (%)
0.01 0.1 1 10 100 1000 10000
3827 F13
0.001
V
OUT
= 3.3V
V
OUT
= 8.5V
20ms/DIV
3827 F14
V
OUT2
2V/DIV
V
OUT1
2V/DIV
1µs/DIV
3827 F15
SW1
5V/DIV
SW2
5V/DIV
Effi ciency vs Load Current Start-Up SW Node Waveform
LTC3827
32
3827ff
TYPICAL APPLICATION
Effi ciency vs Load Current Start-Up SW Node Waveform
High Effi ciency Dual 5V/9.5V Step-Down Converter
C
IN1
10µF
C
INT2
1µF
D2
D1
C1
1nF
R
B1
365k
3827 TA03
C
SS1
0.01µF
C
ITH1
470pF
R
ITH1
10k
R
A1
69.8k
C
ITH1A
100pF
C2
1nF
R
B2
432k
C
SS2
0.01µF
C
ITH2
330pF
R
ITH2
15k
R
A2
39.2k
C
ITH2A
100pF
C
B2
0.47µF
100k
C
INT1
4.7µF
C
OUT2
150µF
C
B1
0.47µF
MTOP2
MBOT2
MTOP1
MBOT1
L2
7.2µH
R
SNS2
12mΩ
V
OUT1
5V
5A
V
IN
12V
V
OUT2
9.5V
3A
L1
3.3µH
R
SNS1
12mΩ
C
IN2
10µF
C
OUT1
150µF
I
TH1
V
FB1
SENSE1
+
SENSE1
–
PLLLPF
PHASMD
CLKOUT
PLLIN/MODE
SGND
RUN1
RUN2
SENSE2
–
SENSE2
+
V
FB2
I
TH2
TRACK/SS2
TRACK/SS1
PGOOD2
PGOOD1
TG1
SW1
BOOST1
BG1
V
IN
PGND
EXTV
CC
INTV
CC
BG2
BOOST2
SW2
TG2
FOLDDIS
+
100k
LTC3827
MTOP1, MTOP2, MBOT1, MBOT2: Si7848DP
L1: CDEP105-3R2M
L2: CDEP105-7R2M
C
OUT1
, C
OUT2
: SANYO 10TPD150M
LOAD CURRENT (mA)
EFFICIENCY (%)
0.01 0.1 1 10 100 1000 10000
3827 F16
0.001
40
50
60
70
80
30
20
10
0
90
100
V
OUT
= 5V
V
OUT
= 9.5V
20ms/DIV
3827 F17
V
OUT2
2V/DIV
V
OUT1
2V/DIV
1µs/DIV
3827 F18
SW1
5V/DIV
SW2
5V/DIV
LTC3827
33
3827ff
TYPICAL APPLICATION
High Effi ciency Synchronizable Dual 5V/8V Step-Down Converter
C
IN1
10µF
C
INT2
1µF
D2
D1
C1
1nF
39pF
R
B1
365k
3827 TA04
C
SS1
0.01µF
C
ITH1
420pF
R
ITH1
10k
R
A1
69.8k
C
ITH1A
100pF
C2
1nF
R
B2
353k
C
SS2
0.01µF
C
ITH2
560pF
R
ITH2
35k
R
A2
39.2k
C
ITH2A
100pF
C
B2
0.47µF
100k
C
INT1
4.7µF
C
OUT2
150µF
C
B1
0.47µF
MTOP2
MBOT2
MTOP1
MBOT1
L2
7.2µH
R
SNS2
20mΩ
V
OUT1
5V
5A
V
IN
12V
V
OUT2
8V
2A
L1
3.3µH
R
SNS1
12mΩ
C
IN2
10µF
C
OUT1
150µF
I
TH1
V
FB1
SENSE1
+
SENSE1
–
PLLLPF
PHASMD
CLKOUT
PLLIN/MODE
SGND
RUN1
RUN2
SENSE2
–
SENSE2
+
V
FB2
I
TH2
TRACK/SS2
TRACK/SS1
PGOOD2
PGOOD1
TG1
SW1
BOOST1
BG1
V
IN
PGND
EXTV
CC
INTV
CC
BG2
BOOST2
SW2
TG2
FOLDDIS
+
100k
D3
D4
10nF
10k
LTC3827
MTOP1, MTOP2, MBOT1, MBOT2: Si7848DP
L1: CDEP105-3R2M
L2: CDEP105-7R2M
C
OUT1
, C
OUT2
: SANYO 10TPD150M
22pF
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36

LTC3827IUH#TRPBF

Mfr. #:
Buy LTC3827IUH#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators L IQ, 2x, 2-PhSync Buck Cntr
Lifecycle:
New from this manufacturer.
Delivery:
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