Datasheet

LTC3822-1
21
38221f
Figure 11. 3.3V
IN
1.8V/12A High Effi ciency High Current 300kHz Step-Down Converter
APPLICATIONS INFORMATION
47µF
×2
Si7882DP
*TAIYO YUDEN JMK325BJ107MM
**TOKO FDU0650
Si7882DP
V
IN
3.3V
V
OUT
1.8V
12A
38221 F07
13.7k
1M
680pF
IPRG V
IN
PLLLPF
SW
SENSE
–
BOOST
TG
RUN
PGOOD
SYNC/MODE
I
TH
V
FB
BGGND
LTC3822EGN-1
TRACK/SS
59k
1%
0.22µF
0.56µH**
100µF*
×2
33pF
118k 1%
68pF
LOAD CURRENT (mA)
65
EFFICIENCY (%)
95
60
55
90
75
85
80
70
10 1000 10000 100000
38221 F11b
50
100
Burst Mode
OPERATION
PULSE
SKIPPING
CONTINUOUS
MODE
V
OUT
200mV/DIV
AC COUPLED
INDUCTOR
CURRENT
5A/DIV
V
IN
= 3.3V
V
OUT
= 1.8V
FORCED CONTINUOUS MODE 1A TO 6A
50µs/DIV
38221 F11c
Effi ciency Load Step