Datasheet

LTC3862
36
3862fc
For more information www.linear.com/LTC3862
Typical applicaTions
A 12V Input, 24V/5A Output 2-Phase Boost Converter Application Circuit
Start-Up Load Step
I
LOAD
5A/DIV
I
L1
5A/DIV
I
L2
5A/DIV
V
OUT
500mV/DIV
500µs/DIV
3862 TA02c
V
IN
= 12V
V
OUT
= 24V
I
LOAD
= 2A TO 5A
LOAD CURRENT (mA)
EFFICIENCY (%)
POWER LOSS (mW)
100
95
90
3862 TA02d
75
10000
1000
100
85
80
10000
100 1000
EFFICIENCY
POWER LOSS
V
IN
= 12V
V
OUT
= 24V
Efficiency
RUN
5V/DIV
I
L1
5A/DIV
I
L2
5A/DIV
V
OUT
20V/DIV
1ms/DIV
3862 TA02b
V
IN
= 12V
V
OUT
= 24V
I
LOAD
= 5A
SENSE1
+
3V8
SLOPE
BLANK
CLKOUT
SYNC
PLLFLTR
PHASEMODE
D
MAX
10nF
SENSE1
–
SENSE2
–
SENSE2
+
RUN
FREQ
SS
V
IN
45.3k 15k
100k
10Ω
V
IN
5V TO 24V
D1
MBRD835L
D2
MBRD835L
10Ω
L2
4.2µH
CDEP145-4R2
ITH
SGND
V
OUT
6.98k
FB
26.7k
130k
10nF
1µF
1nF
22µF 25V
0.007Ω
1W
Q1
Si7386DP
Q2
Si7386DP
0.007Ω
1W
V
OUT
24V
5A (MAX)
3862 TA02a
100µF
35V
100µF
35V
22µF 25V
22µF 25V
10µF 50V
LTC3862
1nF
100pF
INTV
CC
GATE1
GATE2
PGND
4.7µF
10nF
10µF 50V
10µF 50V
10µF 50V
L1
4.2µH
CDEP145-4R2
+
+