LT3980
24
3980fa
For more information www.linear.com/LT3980
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
LINEAR TECHNOLOGY CORPORATION 2009
LT 1013 REV A • PRINTED IN USA
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/LT3980
PART NUMBER DESCRIPTION COMMENTS
LT3689 36V, 60V
Transient Protection, 800mA, 2.2MHz High Efficiency Micropower
Step-Down DC/DC Converter with POR Reset and Watchdog Timer
V
IN
: 3.6V to 36V (Transient to 60V), V
OUT(MIN)
= 0.8V,
I
Q
= 75µA, I
SD
< 1µA, 3mm × 3mm QFN-16 Package
LT3682 36V, 60V
MAX
, 1A, 2.2MHz High Efficiency Micropower Step-Down DC/DC
Converter
V
IN
: 3.6V to 36V, V
OUT(MIN)
= 0.8V, I
Q
= 75µA, I
SD
< 1µA,
3mm
× 3mm DFN-12
LT3970 40V, 350mA (I
OUT
), 2.2MHz High Efficiency Step-Down DC/DC
Converter with Only 2.5µA of Quiescent Current
V
IN
: 4.2V to 40V, V
OUT(MIN)
= 1.21V, I
Q
= 2.5µA, I
SD
< 1µA,
3mm
× 3mm DFN-10 and MSOP-10 Packages
LT3480 36V with Transient Protection to 60V, 2A (I
OUT
), 2.4MHz, High Efficiency
Step-Down DC/DC Converter with Burst Mode Operation
V
IN
: 3.6V to 38V, V
OUT(MIN)
= 0.78V, I
Q
= 70µA, I
SD
< 1µA,
3mm
× 3mm DFN-10 and MSOP-10E Packages
LT3685 36V with Transient Protection to 60V, Dual 2A (I
OUT
), 2.4MHz,
High Efficiency Step-Down DC/DC Converter
V
IN
: 3.6V to 38V, V
OUT(MIN)
= 0.78V, I
Q
= 70µA, I
SD
< 1µA,
3mm
× 3mm DFN-10 and MSOP-10E Packages
LT3481 34V with Transient Protection to 36V, 2A (I
OUT
), 2.8MHz, High Efficiency
Step-Down DC/DC Converter with Burst Mode Operation
V
IN
: 3.6V to 34V, V
OUT(MIN)
= 1.26V, I
Q
= 50µA, I
SD
< 1µA,
3mm
× 3mm DFN-10 and MSOP-10E Packages
LT3684 34V with Transient Protection to 36V, 2A (I
OUT
), 2.8MHz,
High Efficiency Step-Down DC/DC Converter
V
IN
: 3.6V to 34V, V
OUT(MIN)
= 1.26V, I
Q
= 850µA, I
SD
< 1µA,
3mm
× 3mm DFN-10 and MSOP-10E Packages
LT3508 36V with Transient Protection to 40V, Dual 1.4A (I
OUT
), 3MHz,
High Efficiency Step-Down DC/DC Converter
V
IN
: 3.7V to 37V, V
OUT(MIN)
= 0.8V, I
Q
= 4.6mA, I
SD
= 1µA,
4mm
× 4mm QFN-24 and TSSOP-16E Packages
LT3505 36V with Transient Protection to 40V, 1.4A (I
OUT
), 3MHz,
High Efficiency Step-Down DC/DC Converter
V
IN
: 3.6V to 34V, V
OUT(MIN)
= 0.78V, I
Q
= 2mA, I
SD
= 2µA,
3mm
× 3mm DFN-8 and MSOP-8E Packages
LT3500 36V, 40V
MAX
, 2.5MHz High Efficiency Step-Down DC/DC Converter and
LDO Controller
V
IN
: 3.6V to 36V, V
OUT(MIN)
= 0.8V, I
Q
= 2.5mA, I
SD
= 10µA,
3mm
× 3mm DFN-10 Package
LT3507 36V, 2.5MHz, Triple (2.4A + 1.5A + 1.5A (I
OUT
)) with LDO Controller High
Efficiency Step-Down DC/DC Converter
V
IN
: 4V to 36V, V
OUT(MIN)
= 0.8V, I
Q
= 7mA, I
SD
< 1µA,
5mm
× 7mm QFN-38 Package
LT3437 60V, 400mA (I
OUT
), Micropower Step-Down DC/DC Converter with Burst
Mode Operation
V
IN
: 3.3V to 60V, V
OUT(MIN)
= 1.25V, I
Q
= 100µA, I
SD
< 1µA,
3mm
× 3mm DFN-10 and TSSOP-16E Packages
LT1976/LT1977 60V, 1.2A (I
OUT
), 200kHz/500kHz, High Efficiency Step-Down DC/DC
Converters with Burst Mode Operation
V
IN
: 3.3V to 60V, V
OUT(MIN)
= 1.20V, I
Q
= 100µA, I
SD
< 1µA,
TSSOP-16E Package
LT3434/LT3435 60V, 2.4A (I
OUT
), 200kHz/500kHz, High Efficiency Step-Down DC/DC
Converters with Burst Mode Operation
V
IN
: 3.3V to 60V, V
OUT(MIN)
= 1.2V, I
Q
= 100µA, I
SD
< 1µA,
TSSOP-16E Package
LT1936 36V, 1.4A (I
OUT
), 500kHz, High Efficiency Step-Down DC/DC Converter V
IN
: 3.6V to 36V, V
OUT(MIN)
= 1.2V, I
Q
= 1.9mA, I
SD
< 1µA,
MS8E Package
LT3493 36V, 1.4A (I
OUT
), 750kHz High Efficiency Step-Down
DC/DC Converter
V
IN
: 3.6V to 36V, V
OUT(MIN)
= 0.8V, I
Q
= 1.9mA, I
SD
< 1µA,
2mm
× 3mm DFN-6 Package
LT1766 60V, 1.2A (I
OUT
), 200kHz, High Efficiency Step-Down DC/DC Converter V
IN
: 5.5V to 60V, V
OUT(MIN)
= 1.20V, I
Q
= 2.5mA, I
SD
< 25µA,
TSSOP-16 and TSSOP-16E Packages
SW
FB
V
C
PG
RT
V
IN
BD
V
IN
3.6V TO 32V
V
OUT
1.2V
2A
4.7µF
0.47µF
100µF
f = 400kHz
D
14k
97.6k
L
3.3µH
GND
1nF
ON OFF
LT3980
3980 TA09
RUN/SS BOOST
SYNC
100k
52.3k
DA
1.2V Step-Down Converter
relaTeD parTs
Typical applicaTion
