Datasheet

LTC3612
25
3612fb
For more information www.linear.com/LTC3612
TYPICAL APPLICATIONS
General Purpose Buck Regulator Using Ceramic Capacitors, 2.25MHz
RUN
TRACK/SS
RT/SYNC
PGOOD
ITH
PGOOD SGND
PGND
V
IN
2.25V TO 5.5V
PV
IN_DRV
DDR
SV
IN
LTC3612
SW
PV
IN
C
F
1µF
R
F
24Ω
L1
470nH
R1
392k
C3
22pF
R2
196k
3612 TA02a
MODE V
FB
C
O1
47µF
C
O2
22µF
C
C1
10pF
C1
22µF
C2
22µF
C
C
220pF
C
SS
10nF
V
OUT
1.8V
3A
R4
100k
R5B
1M
L1: VISHAY IHLP-2020BZ 0.47µH
R5A
1M
R
C
43k
R
SS
4.7M
Efficiency vs Output Current Load Step Response in Forced Continuous Mode
OUTPUT CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
1 100 1000 10000
3612 TA02b
0
10
V
IN
= 2.5V
V
IN
= 3.3V
V
IN
= 4V
V
IN
= 5.5V
V
OUT
100mV/DIV
I
OUT
1A/DIV
20µs/DIV
3612 TA02c
V
IN
= 3.3V
V
OUT
= 1.8V
I
OUT
= 100mA TO 3A
V
MODE
= 1.5V