Datasheet

LTC3872
18
3872fc
For more information www.linear.com/LTC3872
High Efficiency 5V Input, 48V Output Boost Converter
RUN/SS
5V/DIV
V
OUT
20V/DIV
I
L
5A/DIV
40ms/DIV
3872 TA05b
V
OUT
500mV/DIV
AC-COUPLED
I
L
2A/DIV
I
LOAD
200mA/DIV
500µs/DIV
3872 TA05c
Soft-Start Load Step
Typical applicaTions
LOAD (mA)
1
60
EFFICIENCY (%)
80
100
10 100
1000
3872 TA05d
40
50
70
90
30
20
Efficiency
I
TH
IPRG
GND
V
FB
V
IN
SW
NGATE
LTC3872
D1M1
3872 TA05a
RUN/SS
63.4k
1%
1M
12.1k
1%
475k
1%
C
IN
10µF
C
OUT1
2.2µF
×3
2.2nF
0.33µF
C
OUT2
68µF
L1
10µH
V
IN
5V
V
OUT
48V
0.5A
C
OUT1
: NIPPON CHEMI-CON KTS101B225M43N
D1: DIODES INC. PDS760
L1: SUMIDA CDEP147NP-100
M1: VISHAY Si7850DP
V
IN
+