LTC3634
28
3634fc
For more information www.linear.com/LTC3034
LINEAR TECHNOLOGY CORPORATION 2011
LT 0116 REV C • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/LTC3634
RELATED PARTS
TYPICAL APPLICATION
PART NUMBER DESCRIPTION COMMENTS
LTC3633 15V, Dual 3A (I
OUT
), 4MHz, Synchronous Step-Down
DC/DC Converter
95% Efficiency, V
IN(MIN)
= 3.6V, V
IN(MAX)
= 15V, V
OUT(MIN)
= 0.6V,
I
Q
= 500µA, I
SD
<15µA, 4mm × 5mm QFN-28, TSSOP-28E Package
LTC3605 15V, 5A (I
OUT
), 4MHz, Synchronous Step-Down
DC/DC Converter
95% Efficiency, V
IN(MIN)
= 4V, V
IN(MAX)
= 15V, V
OUT(MIN)
= 0.6V,
I
Q
= 2mA, I
SD
<15µA, 4mm × 4mm QFN-24 Package
LTC3604 15V, 2.5A (I
OUT
), 4MHz, Synchronous Step-Down
DC/DC Converter
95% Efficiency, V
IN(MIN)
= 3.6V, V
IN(MAX)
= 15V, V
OUT(MIN)
= 0.6V,
I
Q
= 300µA, I
SD
<15µA, 4mm × 4mm QFN-20, MSOP-16E Package
LTC3603 15V, 2.5A (I
OUT
), 3MHz, Synchronous Step-Down
DC/DC Converter
95% Efficiency, V
IN(MIN)
= 4.5V, V
IN(MAX)
= 15V, V
OUT(MIN)
= 0.6V,
I
Q
= 75µA, I
SD
<1µA, 4mm × 4mm QFN-20 MSOP-16E Package
LTC3601 15V, 1.5A (I
OUT
), 4MHz, Synchronous Step-Down
DC/DC Converter
95% Efficiency, V
IN(MIN)
= 4V, V
IN(MAX)
= 15V, V
OUT(MIN)
= 0.6V,
I
Q
= 300µA, I
SD
<15µA, 4mm × 4mm QFN-20, MSOP-16E Package
LTC3413 5.5V, 3A (I
OUT
Sink/Source), 2MHz, Monolithic Synchronous
Regulator for DDR/QDR Memory Termination
90% Efficiency, V
IN(MIN)
= 2.25V, V
IN(MAX)
= 5.5V, V
OUT(MIN)
= V
REF
/2,
I
Q
= 280µA, I
SD
<1µA, TSSOP16E Package
LTC3612 5.5V, 3A, 4MHz, Synchronous Step-Down DC/DC Converter 95% Efficiency, V
IN(MIN)
= 2.25V, V
IN(MAX)
= 5.5V, V
OUT(MIN)
= 0.6V,
I
Q
= 75µA, I
SD
<1µA, 3mm × 4mm QFN-20 TSSOP-20E Package
LTC3614 5.5V, 4A, 4MHz, Synchronous Step-Down DC/DC Converter 95% Efficiency, V
IN(MIN)
= 2.25V, V
IN(MAX)
= 5.5V, V
OUT(MIN)
= 0.6V,
I
Q
= 75µA, I
SD
<1µA, 3mm × 5mm QFN-24 Package
LTC3616 5.5V, 6A, 4MHz, Synchronous Step-Down DC/DC Converter 95% Efficiency, V
IN(MIN)
= 2.25V, V
IN(MAX)
= 5.5V, V
OUT(MIN)
= 0.6V,
I
Q
= 75µA, I
SD
<1µA, 3mm × 5mm QFN-24 Package
LTC3615 5.5V, Dual 3A, 4MHz, Synchronous Step-Down
DC/DC Converter
95% Efficiency, V
IN(MIN)
= 2.25V, V
IN(MAX)
= 5.5V, V
OUT(MIN)
= 0.6V,
I
Q
= 130µA, I
SD
<1µA, 4mm × 4mm QFN-24 TSSOP-24E Package
LTC3876 38V Dual DC/DC Controller for DDR Power with
V
TT
Reference
95% Efficiency, V
IN(MIN)
= 4.5V, V
IN(MAX)
= 38V, V
PPQ
= 1V to 2.5V,
V
TT
= 1/2 V
PPQ
, 5mm × 7mm QFN-38, TSSOP-38
LTC3633A 20V, Dual 3A (I
OUT
), 4MHz, Synchronous Step-Down
DC/DC Converter
95% Efficiency, V
IN(MIN)
= 3.6V, V
IN(MAX)
= 20V, I
Q
= 500µA, I
SD
<15µA,
4mm × 5mm QFN-28, TSSOP-28E Package
Figure 12a. V
TT
Powered from V
DDQ
Figure 12b. 2-Phase V
TT
Termination Using Two Input Supplies
RUN1
RUN2
RT
INTV
CC
PHMODE
V
FB1
VDDQIN
ITH1
ITH2
LTC3634
3634 TA02b
L1
1.5µH
L2
1.5µH
0.1µF
0.1µF
PGNDSGND
BOOST1
SW1
BOOST2
SW2
V
FB2
V
ON2
V
ON1
VTTR
MODE/SYNC
V
IN2
12V
V
IN1
V
TT
V
DDQ
/2
AT ±6A
5V
C
OUT2
100µF
×4
V
REF
V
DDQ
/2
AT ±10mA
10k
680pF
C2
2.2µF
C1
22µF
C3
47µF
0.01µF
10pF
10pF
R1
324k
V
DDQ
SUPPLY
RUN1
RUN2
RT
INTV
CC
PHMODE
MODE/SYNC
ITH1
ITH2
LTC3634
3634 TA02a
L1
1µH
R2
18.2k
R1
12.1k
0.1µF
0.1µF
PGNDSGND
BOOST1
SW1
V
ON1
VDDQIN
V
FB1
BOOST2
SW2
V
FB2
V
ON2
VTTR
V
IN2
V
IN
3.6V TO
15V
V
IN1
L2
0.47µH
R
COMP2
18k
C
OUT1
100µF
×2
V
DDQ
1.5V
C
OUT2
100µF
×4
C3
0.01µF
C6
22µF
V
TT
0.75V
V
REF
C
COMP2
910pF
R
COMP1
26.4k
C
COMP1
560pF
C2
2.2µF
C1
22µF
C4
10pF
C5
10pF
R
T
162k
