Datasheet

LTC3617
17
3617fa
typical applications
1.25V, ±6A DDR Memory Termination Supply, 2.25MHz
RUN
VDDQIN
RT
PGOOD
ITH
PGOOD SGND
PGND
V
IN
2.5V TO 5.5V
VDDQ
2.5V
VTTR
SV
IN
LTC3617
SW
PV
IN
C
F
1µF
R
F
24Ω
L1
0.15µH
3617 TA02a
SYNC
V
FB
C
O2
100µF
C
C1
10pF
C
IN
22µF
×4
C
C
470pF
VTT
1.25V
±6A
C
O1
0.1µF
V
REF
1.25V
±10mA
R1
100k
L1: VISHAY IHLP-2525CZ-01 150nH
R
C
20k
Efficiency vs Load Current Load Step Response
LOAD CURRENT (A)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
3617 TA02b
0
0.1 1 10
V
IN
= 2.5V
V
IN
= 3.3V
V
IN
= 5V
V
TT
50mV/DIV
I
L
4A/DIV
40µs/DIV
3617 TA02c
V
IN
= 3.3V
VTT = 1.25V
I
LOAD
= 100mA TO 6A