Datasheet

LT3686A
30
3686afa
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
●
www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2010
LT 0511 REV A • PRINTED IN USA
PART NUMBER DESCRIPTION COMMENTS
LT3686 37V, 55V with Transient Protection 1.2A, 2.5MHz, High
Efficiency Step-Down DC/DC Converter
V
IN
: 3.6V to 37V, Transient to 55V, V
OUT(MIN)
= 0.8V, I
Q
= 1.1mA, I
SD
<1µA,
10-Pin 3mm × 3mm DFN Package
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,
16-Pin 3mm × 3mm QFN 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, 12-Pin 3mm × 3mm
DFN Package
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, 10-Pin
2mm × 3mm DFN, 10-Pin MSOP Packages
LT3990 60V, 350mA (I
OUT
), 2.2MHz, High Efficiency Step-Down
DC/DC Converter with Only 2.5µA of Quiescent Current
V
IN
: 4.2V to 60V, V
OUT(MIN)
= 1.21V, I
Q
= 2.5µA, I
SD
<1µA, 10-Pin
3mm × 3mm DFN, 16-Pin MSOPE 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, 10-Pin
3mm × 3mm DFN, 10-Pin MSOP Packages
LT3685 36V with Transient Protection to 60V, 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, 10-Pin
3mm × 3mm DFN, 10-Pin MSOP 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, 8-Pin
3mm × 3mm DFN, 8-Pin MSOP Packages
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, 10-Pin
3mm × 3mm DFN, 16-Pin TSSOP Packages
LT1976/LT1977 60V, 1.2A (I
OUT
), 200/500kHz, High Efficiency
Step-Down DC/DC Converter with Burst Mode Operation
V
IN
: 3.3V to 60V, V
OUT(MIN)
= 1.2V, I
Q
= 100µA, I
SD
<1µA, 16-Pin TSSOP
Package
relAteD pArts
typicAl ApplicAtion
5V Step-Down Converter
SW
DA
FB
SYNC/MODE
SS
RT
V
IN
V
IN
7V TO 37V
BD
V
OUT
5V
1.2A
0.22µF
2.2µF
1nF
15µF
10k
61.9k
10µH
52.3k
GND
LT3686A
3686A TA02f
EN/UVLO
BOOST