LTC3621/LTC3621-2
18
3621fc
For more information www.linear.com/LTC3621
LINEAR TECHNOLOGY CORPORATION 2013
LT 0415 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/LTC3621
relaTeD parTs
Typical applicaTion
PART NUMBER DESCRIPTION COMMENTS
LTC3646/
LTC3646-1
40V, 1A (I
OUT
), 3MHz Synchronous Step-Down
DC/DC Converter
95% Efficiency, V
IN
: 4V to 40V, V
OUT(MIN)
= 0.6V, I
Q
= 140µA, I
SD
< 8µA,
3mm × 4mm DFN-14, MSOP-16E Packages
LTC3600 1.5A, 15V
, 4MHz Synchronous Rail-to-Rail Single
Resistor Step-Down Regulator
95% Efficiency, V
IN
: 4V to 15V, V
OUT(MIN)
= 0V, I
Q
= 700µA, I
SD
< 1µA,
3mm × 3mm DFN-12, MSOP-12E Packages
LTC3601 15V
, 1.5A (I
OUT
) 4MHz Synchronous Step-Down
DC/DC Converter
95% Efficiency, V
IN
: 4.5V to 15V, V
OUT(MIN)
= 0.6V, I
Q
= 300µA, I
SD
< 1µA,
4mm × 4mm QFN-20, MSOP-16E Packages
LTC3603 15V
, 2.5A (I
OUT
) 3MHz Synchronous Step-Down
DC/DC Converter
95% Efficiency, V
IN
: 4.5V to 15V, V
OUT(MIN)
= 0.6V, I
Q
= 75µA, I
SD
< 1µA,
4mm × 4mm QFN-20, MSOP-16E Packages
LTC3633/
L
TC3633A
15V/20V, Dual 3A (I
OUT
) 4MHz Synchronous Step-Down
DC/DC Converter
95% Efficiency, V
IN
: 3.6V to 15V/20V, V
OUT(MIN)
= 0.6V, I
Q
= 500µA, I
SD
< 15µA,
4mm × 5mm QFN-28, TSSOP-28E Packages. A Version Up to 20V
IN
LTC3605/
LTC3605A
15V/20V, 5A (I
OUT
) 4MHz Synchronous Step-Down
DC/DC Converter
95% Efficiency, V
IN
: 4V to 15V/20V, V
OUT(MIN)
= 0.6V, I
Q
= 2mA, I
SD
< 15µA,
4mm × 4mm QFN-24 Package. A Version Up to 20V
IN
LTC3604 15V, 2.5A (I
OUT
) 4MHz Synchronous Step-Down
DC/DC Converter
95% Efficiency, V
IN
: 3.6V to 15V, V
OUT(MIN)
= 0.6V, I
Q
= 300µA, I
SD
< 14µA,
3mm × 3mm QFN-16, MSOP-16E Packages
LTC1877 600mA (I
OUT
) 550kHz Synchronous Step-Down
DC/DC Converter
V
IN
: 2.7V to 10V, V
OUT(MIN)
= 0.8V, I
O
= 10µA, I
SD
< 1µA, MSOP-8 Package
LT8610/LT8611 42V, 2.5A (I
OUT
) Synchronous Step-Down
DC/DC Converter
96% Efficiency, V
IN
: 3.4V to 42V, V
OUT(MIN)
= 0.97V, I
Q
= 2.5µA, I
SD
< 1µA,
MSOP-16E Package
R3
187k
C
FB
22pF
C1
1µF
C
OUT
22µF
3621 TA02
L1
3.3µH
V
OUT
5V
R4
25.5k
V
IN
RUN
SW
V
IN
12V
LTC3621-2
GND
FB
MODE/SYNC
INTV
CC
C
IN
10µF
3621 TA02
5V
OUT
with 400mA Burst Mode Operation, 2.25MHz
1.2V
OUT
, Forced Continuous Mode, 1MHz
1.2V
OUT
, Synchronized to 600kHz, Forced Continuous Mode
C
FB
22pF
C1
1µF
C
OUT
22µF
1.2V2.7V TO 17V
3621 TA03
L1
3.3µH
R5
604k
1V
V
IN
RUN
SW
LTC3621
GND
FB
MODE/SYNC
INTV
CC
C
IN
10µF
R1
604k
V
V
OUT
V
IN
C
FB
22pF
C1
1µF
C
OUT
22µF
1.2V2.7V TO 17V
3621 TA04
4.7µH
R5
604k
600kHz CLK
V
IN
RUN
SW
LTC3621
GND
FB
MODE/SYNC
INTV
CC
C
IN
10µF
R1
604k
V
V
IN