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
VIN: 3.6V to 36V (Transient to 60V), VOUT(MIN) = 0.8V,
IQ = 75µA, ISD < 1µA, 3mm × 3mm QFN-16 Package
LT3682 36V, 60VMAX, 1A, 2.2MHz High Efficiency Micropower Step-Down DC/DC
Converter
VIN: 3.6V to 36V, VOUT(MIN) = 0.8V, IQ = 75µA, ISD < 1µA,
3mm × 3mm DFN-12
LT3970 40V, 350mA (IOUT), 2.2MHz High Efficiency Step-Down DC/DC
Converter with Only 2.5µA of Quiescent Current
VIN: 4.2V to 40V, VOUT(MIN) = 1.21V, IQ = 2.5µA, ISD < 1µA,
3mm × 3mm DFN-10 and MSOP-10 Packages
LT3480 36V with Transient Protection to 60V, 2A (IOUT), 2.4MHz, High Efficiency
Step-Down DC/DC Converter with Burst Mode Operation
VIN: 3.6V to 38V, VOUT(MIN) = 0.78V, IQ = 70µA, ISD < 1µA,
3mm × 3mm DFN-10 and MSOP-10E Packages
LT3685 36V with Transient Protection to 60V, Dual 2A (IOUT), 2.4MHz,
High Efficiency Step-Down DC/DC Converter
VIN: 3.6V to 38V, VOUT(MIN) = 0.78V, IQ = 70µA, ISD < 1µA,
3mm × 3mm DFN-10 and MSOP-10E Packages
LT3481 34V with Transient Protection to 36V, 2A (IOUT), 2.8MHz, High Efficiency
Step-Down DC/DC Converter with Burst Mode Operation
VIN: 3.6V to 34V, VOUT(MIN) = 1.26V, IQ = 50µA, ISD < 1µA,
3mm × 3mm DFN-10 and MSOP-10E Packages
LT3684 34V with Transient Protection to 36V, 2A (IOUT), 2.8MHz,
High Efficiency Step-Down DC/DC Converter
VIN: 3.6V to 34V, VOUT(MIN) = 1.26V, IQ = 850µA, ISD < 1µA,
3mm × 3mm DFN-10 and MSOP-10E Packages
LT3508 36V with Transient Protection to 40V, Dual 1.4A (IOUT), 3MHz,
High Efficiency Step-Down DC/DC Converter
VIN: 3.7V to 37V, VOUT(MIN) = 0.8V, IQ = 4.6mA, ISD = 1µA,
4mm × 4mm QFN-24 and TSSOP-16E Packages
LT3505 36V with Transient Protection to 40V, 1.4A (IOUT), 3MHz,
High Efficiency Step-Down DC/DC Converter
VIN: 3.6V to 34V, VOUT(MIN) = 0.78V, IQ = 2mA, ISD = 2µA,
3mm × 3mm DFN-8 and MSOP-8E Packages
LT3500 36V, 40VMAX, 2.5MHz High Efficiency Step-Down DC/DC Converter and
LDO Controller
VIN: 3.6V to 36V, VOUT(MIN) = 0.8V, IQ = 2.5mA, ISD = 10µA,
3mm × 3mm DFN-10 Package
LT3507 36V, 2.5MHz, Triple (2.4A + 1.5A + 1.5A (IOUT)) with LDO Controller High
Efficiency Step-Down DC/DC Converter
VIN: 4V to 36V, VOUT(MIN) = 0.8V, IQ = 7mA, ISD < 1µA,
5mm × 7mm QFN-38 Package
LT3437 60V, 400mA (IOUT), Micropower Step-Down DC/DC Converter with Burst
Mode Operation
VIN: 3.3V to 60V, VOUT(MIN) = 1.25V, IQ = 100µA, ISD < 1µA,
3mm × 3mm DFN-10 and TSSOP-16E Packages
LT1976/LT1977 60V, 1.2A (IOUT), 200kHz/500kHz, High Efficiency Step-Down DC/DC
Converters with Burst Mode Operation
VIN: 3.3V to 60V, VOUT(MIN) = 1.20V, IQ = 100µA, ISD < 1µA,
TSSOP-16E Package
LT3434/LT3435 60V, 2.4A (IOUT), 200kHz/500kHz, High Efficiency Step-Down DC/DC
Converters with Burst Mode Operation
VIN: 3.3V to 60V, VOUT(MIN) = 1.2V, IQ = 100µA, ISD < 1µA,
TSSOP-16E Package
LT1936 36V, 1.4A (IOUT), 500kHz, High Efficiency Step-Down DC/DC Converter VIN: 3.6V to 36V, VOUT(MIN) = 1.2V, IQ = 1.9mA, ISD < 1µA,
MS8E Package
LT3493 36V, 1.4A (IOUT), 750kHz High Efficiency Step-Down
DC/DC Converter
VIN: 3.6V to 36V, VOUT(MIN) = 0.8V, IQ = 1.9mA, ISD < 1µA,
2mm × 3mm DFN-6 Package
LT1766 60V, 1.2A (IOUT), 200kHz, High Efficiency Step-Down DC/DC Converter VIN: 5.5V to 60V, VOUT(MIN) = 1.20V, IQ = 2.5mA, ISD < 25µA,
TSSOP-16 and TSSOP-16E Packages
SW
FB
VC
PG
RT
VIN BD
VIN
3.6V TO 32V
VOUT
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