LT3514
26
3514fa
For more information www.linear.com/LT3514
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
LINEAR TECHNOLOGY CORPORATION 2013
LT 0114 REV A • PRINTED IN USA
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/LT3514
RELATED PARTS
TYPICAL APPLICATION
PART DESCRIPTION COMMENTS
LT3504 40V, Quad 1A Step-Down 2.5MHz DC/DC Converter with 100% Duty
Cycle Operation
V
IN(MIN)
= 3.2V, V
IN(MAX)
= 40V, I
Q
= 7.1mA, I
SD
< 1µA,
4mm x 5mm QFN-28 Package
LT3507/
L
T3507A
36V 2.5MHz, Triple [2.4A + 1.5A + 1.5A (I
OUT
)] with LDO Controller
High Efficiency Step-Down DC/DC Converter
V
IN(MIN)
= 4V, V
IN(MAX)
= 36V, V
OUT(MIN)
= 0.8V, I
Q
= 7mA,
I
SD
= 1µA, 5mm x 7mm QFN-38 Package
LT8610 42V 2.2MHz, Synchronous, Low I
Q
= 2.5µA, Step-Down DC/DC
Converter
V
IN(MIN)
= 3.4V, V
IN(MAX)
= 42V, V
OUT(MIN)
= 0.97V, I
Q
= 2.5µA,
I
SD
= 1µA, MSOP-16E Package
LT3988 60V with Transient Protection to 80V, 2.5MHz, Dual 1A High
Efficiency Step-Down DC/DC Converter
V
IN(MIN)
= 4.0V, V
IN(MAX)
= 60V, V
OUT(MIN)
= 0.75V, I
Q
= 2mA,
I
SD
= 1µA, MSOP-16E Package
LT3509 36V with Transient Protection to 60V, Dual 0.70(I
OUT
), 2.2MHz,
High Efficiency Step-Down DC/DC Converter
V
IN(MIN)
= 3.6V, V
IN(MAX)
= 36V, V
OUT(MIN)
= 0.8V, I
Q
= 1.9mA,
I
SD
= 1µA, 3mm × 4mm DFN-14, MSOP-16E Packages
LT3500 36V, 40V
MAX
, 2A, 2.5MHz High Efficiency Step-Down DC/DC
Converter and LDO Controller
V
IN(MIN)
= 3.6V, V
IN(MAX)
= 36V, V
OUT(MIN)
= 0.8V, I
Q
= 2.5mA,
I
SD
<10µA, 3mm × 3mm DFN-10 Package
LT3508 36V with Transient Protection to 40V, Dual 1.4A (I
OUT
), 3MHz,
High Efficiency Step-Down DC/DC Converter
V
IN(MIN)
= 3.7V, V
IN(MAX)
= 37V, V
OUT(MIN)
= 0.8V, I
Q
= 4.6mA,
I
SD
= 1µA, 4mm × 4mm QFN-24, TSSOP-16E Packages
LT3980 58V with Transient Protection to 80V, 2A (I
OUT
), 2.4MHz, High
Efficiency Step-Down DC/DC Converter with Burst Mode
®
Operation
V
IN(MIN)
= 3.6V, V
IN(MAX)
= 58V, Transient to 80V, V
OUT(MIN)
= 0.8V,
I
Q
= 85µA, I
SD
<1µA, 3mm × 4mm DFN-16 and MSOP-16E 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(MIN)
= 3.6V, V
IN(MAX)
= 38V, V
OUT(MIN)
= 0.78V, I
Q
= 70µA,
I
SD
<1µA, 3mm × 3mm DFN-10, MSOP-10E Packages
LT3689 36V, 60V Transient Protection, 800mA, 2.2MHz High Efficiency
Micropower Step-Down DC/DC Converter with POR Reset and
Watchdog Timer
V
IN(MIN)
= 3.6V, V
IN(MAX)
= 36V, Transient to 60V, V
OUT(MIN)
= 0.8V,
I
Q
= 75µA, I
SD
<1µA. 3mm × 3mm QFN-16 Package
LT3970 40V, 350mA, 2MHz High Efficiency Micropower Step-Down
DC/DC Converter
V
IN(MIN)
= 4V, V
IN(MAX)
= 40V, Transient to 60V, V
OUT(MIN)
= 1.21V,
I
Q
= 2µA, I
SD
<1µA, 3mm × 2mm DFN-10 and MSOP-10 Packages
LT3682 36V, 60VMAX, 1A, 2.2MHz High Efficiency Micropower Step-Down
DC/DC Converter
V
IN(MIN)
= 3.6V, V
IN(MAX)
= 36V, V
OUT(MIN)
= 0.8V, I
Q
= 75µA,
I
SD
< 1µA, 3mm × 3mm DFN-12 Package
Complete Triple Buck Regulator with 180V Surge Protection
3514 TA02
8.2µH
CSKY
2.2µF
VSKY
PG
2.2µF
×2
D3
L5
10µH
V
SUPPLY
3.2V TO 30V
SURGE PROTECTION TO 180V
Q1: FQB34N20L
D1: BZT52C36-7-F
D2: BZT52C6V8-7-F
D3: BAT54-7-F
L1: CDRH5D28-4R2
L3: CDRH8D28-4R7
L4: CDRH5D28-8R2
L5: CBC2016100M
0.1µF
18.2k
GND
LT3514
D1
36V
C1
0.1µF
22µF
SKY
SW5
V
IN
V
IN
V
IN
EN/UVLO
PG
RUN/SS1
RUN/SS3
RUN/SS4
RT/SYNC
SW1
DA1
FB1
2.5V/1A
82pF
21.5k
10.2k
22µF
SW3
DA3
FB3
3.3V/2A
47pF
31.6k
10.2k
47µF
SW4
DA4
FB4
5V/1A
22pF
53.6k
10.2k
22µF
4.2µH
L3
L4
L1
4.7µH
+
D2
6.8V
R3
1k
R2
100k
R1
10Ω
Q1
