Datasheet

LTC3618
24
3618fc
For more information www.linear.com/LTC3618
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
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FAX: [phone]
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www.linear.com/LTC3618
 LINEAR TECHNOLOGY CORPORATION 2013
LT 1013 • PRINTED IN USA
relaTeD parTs
Typical applicaTion
PART NUMBER DESCRIPTION COMMENTS
LTC3546 5.5V, Dual 3A/1A, 4MHz, Synchronous Step-Down DC/
DC Converter
95% Efficiency, V
IN
: 2.25V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 160µA, I
SD
< 1µA,
4mm × 5mm QFN-28 Package
LTC3417A-2 5.5V, Dual 1.5A/1A, 4MHz, Synchronous Step-Down
DC/DC Converter
95% Efficiency, V
IN
: 2.25V to 5.5V, V
OUT(MIN)
= 0.8V, I
Q
= 125µA, I
SD
< 1µA,
TSSOP-16E and 3mm × 5mm DFN-16 Packages
LTC3612 5.5V, 3A, 4MHz, Synchronous Step-Down DC/DC
Converter
95% Efficiency, V
IN
: 2.25V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 75µA, I
SD
< 1µA,
3mm × 4mm QFN-20 and TSSOP-20E Packages
LTC3614 5.5V, 4A, 4MHz, Synchronous Step-Down DC/DC
Converter
95% Efficiency, V
IN
: 2.25V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 75µA, I
SD
< 1µA,
3mm × 4mm QFN-20 and TSSOP-20E Packages
LTC3616 5.5V, 6A, 4MHz, Synchronous Step-Down DC/DC
Converter
95% Efficiency, V
IN
: 2.25V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 75µA, I
SD
< 1µA,
3mm × 5mm QFN-24 Package
LTC3617 ±6A Monolithic Synchronous Buck for DDR T
ermination Over 90% Efficiency, V
IN
: 2.25V to 5.5V, 5k V
OUT(MIN)
= 0.5V, 3mm × 5mm
QFN-24 Package
External Compensation, 500kHz Sync 180° Phasing
Efficiency vs Output Current of V
DDQ
Efficiency vs Output Current of V
TT
LOAD CURRENT (mA)
30
EFFICIENCY (%)
POWER LOSS (W)
90
100
20
10
80
50
70
60
40
10
3618 TA03b
0
0.6
1.8
2.0
0.4
0.2
1.6
1.0
1.4
1.2
0.8
0
0.1 10.001 0.01
V
IN
= 2.5V
V
IN
= 3.3V
V
IN
= 5V
LOAD CURRENT (mA)
30
EFFICIENCY (%)
POWER LOSS (W)
90
100
20
10
80
50
70
60
40
10
3618 TA03c
0
0.6
1.8
2.0
0.4
0.2
1.6
1.0
1.4
1.2
0.8
0
0.1 10.001 0.01
V
IN
= 2.5V
V
IN
= 3.3V
V
IN
= 5V
(2×) SW1
FB1
LTC3618
3618 TA03a
SGND
RUN1
TRACK/SS1
R
T
750k
ITH1
PHASE
RUN2
PGOOD2
ITH2
PGOOD1
RT
VTTR
V
REF
MODE/SYNC
V
IN
2.5V~5V
PGOOD
SV
IN
(2×) PV
IN1
(2×) PV
IN2
VDDQIN
2.2µH
47µF
V
DDQ
1.5V/±3A
10pF
R1
845k
R2
562k
R
C2
6.49k
C
C2
1000pF
R
C1
10k
C
C1
1000pF
(2×) SW2
FB2
2.2µH
47µF
×2
V
TT
0.75V/±3A
10pF
10pF
100k
PGND
1µF
47µF47µF
0.01µF
500kHz