LT3694/LT3694-1
28
36941fb
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2010
LT 0312 REV B • PRINTED IN USA
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
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
LT3500 36V, 40V
MAX
, 2A, 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
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,
3mm × 3mm DFN-10 and MSOP-10E Packages
LT3970 40V, 350mA, 2MHz High Efficiency Micropower Step-Down
DC/DC Converter
V
IN
: 4V to 40V, Transient to 60V, V
OUT(MIN)
= 1.21V, I
Q
= 2µA,
I
SD
< 1µA, 3mm × 2mm DFN-10 and MSOP-10 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
: 3.6V to 58V, Transient to 80V, V
OUT(MIN)
= 0.8V, I
Q
= 85µA,
I
SD
< 1µA, 3mm × 4mm DFN-16 and MSOP-16E Packages
TYPICAL APPLICATION
SW
FB3
FB1
FB2
RT
V
IN
V
C1
BIAS
V
IN
6V TO 28V
TRANSIENT TO 70V
f
SW
= 1MHz
GND
LT3694-1
36941 TA05
TRK/SS1
TRK/SS2
TRK/SS3
LIM2
DRV2
DA
LIM3
DRV3
EN/UVLO BST
OUT1
3.3V
500mA
OUT3
1.8V
200mA
OUT2
2.5V
450mA
22µF
34k
B340A
2.2µH
0.1µF
10k
OUT1
OUT1
ZXTN25012EZ
ZXTN25012EZ
30.9k
14k
24.9k
10.7k
40.2k
10k
255k
20pF
10µF
2.2µF
200k
2.2µF
20pF
PGOOD
CLKOUT
0.2Ω
0.1Ω
270pF
52.3k
200k
1nF
EN4
EN5
EN6
OUT4
1.8V, 800mA
511k
226k226k
1.5µH
1.5µH
1.5µH
10µF10µF
20pF
301k
10µF
10µF
SW2
V
FB1
V
IN
PV
IN
V
FB2
V
FB3
GNDA
GNDA PGND
PGND
LTC3545
RUN1
PGOOD1
RUN2
PGOOD2
RUN3
SYNC/MODE
SW1 SW3
OUT5
1.2V
800mA
OUT6
1.5V, 800mA
2.2µF
6V to 28V Input Range with Cascaded Step Down — 3.3V, 2.5V and 1.8V Outputs
Plus Independently Enabled 1.8V, 1.5V and 1.2V Outputs
