Datasheet

LTC3862-1
36
38621f
TYPICAL APPLICATION
A 24V Input, 48V/6A Output 2-Phase Boost Converter Application Circuit
Start-Up Load Step
Effi ciency
SENSE1
+
3V8
SLOPE
BLANK
CLKOUT
SYNC
PLLFLTR
PHASEMODE
D
MAX
10nF
SENSE1
–
SENSE2
–
SENSE2
+
RUN
FREQ
SS
V
IN
45.3k 24.9k
150k
10
V
IN
8.5V TO 36V
D1
30BQ060
D2
30BQ060
10
L2
19µH
PA2050-193
ITH
SGND
V
OUT
7.87k
FB
30.1k
301k
0.1µF
1µF
1nF
22µF 25V
0.005
1W
Q1
HAT2279H
Q2
HAT2279H
0.005
1W
V
OUT
48V
6A (MAX)
3862 TA02a
100µF
35V
22µF 25V
22µF 25V
10µF 50V
LTC3862-1
4.7nF
100pF
INTV
CC
GATE1
GATE2
PGND
4.7µF
10nF
L1
19µH
PA2050-193
+
100µF
35V
+
10µF 50V
10µF 50V
10µF 50V
RUN
5V/DIV
V
IN
= 24V
V
OUT
= 48V
R
L
= 100Ω
V
OUT
50V/DIV
I
L1
5A/DIV
I
L2
5A/DIV
1ms/DIV
38621 TA02b
I
OUT
5A/DIV
V
IN
= 24V
V
OUT
= 48V
ΔI
OUT
= 1A TO 5A
V
OUT
1V/DIV
AC COUPLED
I
L1
5A/DIV
I
L2
5A/DIV
500µs/DIV
38621 TA02c
LOAD CURRENT (mA)
EFFICIENCY (%)
POWER LOSS (mW)
100
96
92
38621 TA02d
84
10000
1000
88
10000
100 1000
V
IN
= 24V
V
OUT
= 48V
EFFICIENCY
POWER LOSS