Datasheet

LTC3862
37
3862fc
For more information www.linear.com/LTC3862
Typical applicaTions
A 4.5V to 5.5V Input, 12V/15A Output 4-Phase Boost Converter Application Circuit
V
IN
5V/DIV
I
L1
MASTER
5A/DIV
I
L2
MASTER
5A/DIV
I
L1
SLAVE
5A/DIV
I
L2
SLAVE
5A/DIV
V
OUT
10V/DIV
1ms/DIV
3862 TA03b
V
IN
= 5V
V
OUT
= 12V
R
LOAD
= 10Ω
I
LOAD
2.5A-5A
5A DIV
I
L1
MASTER
5A/DIV
I
L2
MASTER
5A/DIV
I
L1
SLAVE
5A/DIV
I
L2
SLAVE
5A/DIV
V
OUT
200mV/DIV
250µs/DIV
3862 TA03c
V
IN
= 5V
V
OUT
= 12V
LOAD CURRENT (mA)
100
80
EFFICIENCY (%)
POWER LOSS (mW)
90
100
1000 10000 100000
3862 TA03d
70
75
85
95
65
60
10000
100000
1000
100
EFFICIENCY
POWER LOSS
V
IN
= 5V
V
OUT
= 12V
Start-Up Load Step
Efficiency
SENSE1
+
3V8
SLOPE
BLANK
CLKOUT
SYNC
PLLFLTR
PHASEMODE
D
MAX
10nF
ON/OFF
CONTROL
SENSE1
–
SENSE2
–
SENSE2
+
RUN
FREQ
SS
V
IN
45.3k
10Ω
V
IN
4.5V TO 5.5V
D1
MBRB2515LT41
D2
MBRB2515LT41
10Ω
L2
2.7µH
CDEP145-2R7
ITH
SGND
V
OUT
18.7k
FB
3.83k
165k
10nF
1µF
1nF
33µF 10V
33µF 10V
33µF 10V
0.005Ω
1W
Q1
HAT2165H
Q3
HAT2165H
0.005Ω
1W
V
OUT
12V
15A
220µF
16V
220µF
16V
LTC3862
10nF
330pF
INTV
CC
GATE1
GATE2
PGND
4.7µF
10nF
15µF 25V
15µF 25V
15µF 25V
15µF 25V
L1
2.7µH
CDEP145-2R7
+
+
SENSE1
+
3V8
SLOPE
BLANK
CLKOUT
SYNC
PLLFLTR
PHASEMODE
D
MAX
10nF
SENSE1
–
SENSE2
–
SENSE2
+
RUN
FREQ
SS
V
IN
45.3k
10Ω
D1
MBRB2515LT41
D2
MBRB2515LT41
10Ω
L2
2.7µH
CDEP145-2R7
ITH
SGND
FB
10k
1µF
1nF
33µF 10V
33µF 10V
33µF 10V
0.005Ω
1W
Q1
HAT2165H
Q3
HAT2165H
0.005Ω
1W
3862 TA03a
220µF
16V
220µF
16V
LTC3862
10nF
INTV
CC
GATE1
GATE2
PGND
4.7µF
330pF
10nF
15µF 25V
15µF 25V
15µF 25V
15µF 25V
L1
2.7µH
CDEP145-2R7
+
+