Datasheet

LTC3646/LTC3646-1
23
36461fa
For more information www.linear.com/LTC3646
Typical applicaTions
12V to 1.8V Output with 400kHz External Sync
Efficiency Curve 50mA to 1A Load Step
LOAD CURRENT (A)
0.001
EFFICIENCY (%)
0.1 1
3646 TA02b
0
0.01
100
10
20
30
40
50
60
70
80
90
PVIN
SVIN
RUN
INTV
CC
ITH
RT
MODE/SYNC
EXTV
CC
BOOST
SW
V
ON
V
FB
+
–
SWITCH
CONTROL
400kHz
EXTERNAL
CLOCK
LTC3646
0.1µF
L1
10µH
SGND PGND
22µF
0.6V
226k
100k
R
COMP
49.9k
3646 TA02a
4.7µF
C
COMP
220pF
L1: WÜRTH WE-TPC-744-065-100
V
IN
12V
2Ω
2.2µF
C
F
4.7pF
274k
100µF
137k
V
OUT
1.8V
40µs/DIV
3646 TA02c
V
OUT
100mV/DIV
AC-COUPLED
I
L
1A/DIV
I
LOAD
1A/DIV