LT3694/LT3694-1
TYPICAL APPLICATION
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
V
IN
6V TO 28V
TRANSIENT TO 70V
10µF
200k
52.3k
V
IN
EN/UVLO
BIAS BST
SW
0.1µF
2.2µH
TRK/SS1
TRK/SS2
TRK/SS3
OUT1
3.3V
500mA
1nF
B340A
34k
10k
DA
FB1
270pF
LT3694-1
30.9k
22µF
0.1Ω
V
C1
LIM2
DRV2
OUT1
0.2Ω
ZXTN25012EZ
OUT1
LIM3
DRV3
OUT2
2.5V
450mA
ZXTN25012EZ
2.2µF
OUT3
1.8V
200mA
24.9k
10.7k
2.2µF
FB2
14k
10k
CLKOUT
FB3
PGOOD RT GND
f
= 1MHz
SW
40.2k
10µF
10µF
GNDA
PGND
1.5µH
OUT5
V
IN
PV
IN
SW2
EN4
RUN1
1.2V
20pF
226k
800mA
PGOOD1
RUN2
PGOOD2
RUN3
EN5
EN6
V
FB2
10µF
226k
1.5µH
LTC3545
SYNC/MODE
1.5µH
OUT4
1.8V, 800mA
OUT6
1.5V, 800mA
SW1
SW3
20pF
301k
20pF
511k
2.2µF
10µF
V
GNDA
PGND
V
FB3
FB1
255k
200k
36941 TA05
RELATED PARTS
PART NUMBER DESCRIPTION
COMMENTS
V : 3.6V to 38V, V
LT3480
LT3500
LT3507
LT3685
LT3970
LT3980
36V with Transient Protection to 60V, 2A (I ), 2.4MHz, High
= 0.78V, I = 70µA, I < 1µA,
OUT(MIN) Q SD
OUT
IN
Efficiency Step-Down DC/DC Converter with Burst Mode® Operation 3mm× 3mm DFN-10 and MSOP-10E Packages
36V, 40V , 2A, 2.5MHz High Efficiency Step-Down DC/DC V : 3.6V to 36V, V = 0.8V, I = 2.5mA, I < 10µA,
MAX
IN
OUT(MIN)
Q
SD
Converter and LDO Controller
3mm× 3mm DFN-10 Package
36V, 2.5MHz, Triple (2.4A + 1.5A + 1.5A (I )) with LDO Controller V : 4V to 36V, V
High Efficiency Step-Down DC/DC Converter
= 0.8V, I = 7mA, I < 1µA,
OUT
IN
OUT(MIN)
Q
SD
5mm× 7mm QFN-38 Package
36V with Transient Protection to 60V, 2A (I ), 2.4MHz, High
Efficiency Step-Down DC/DC Converter
V : 3.6V to 38V, V = 0.78V, I = 70µA, I < 1µA,
OUT
IN
OUT(MIN)
Q
SD
3mm× 3mm DFN-10 and MSOP-10E Packages
40V, 350mA, 2MHz High Efficiency Micropower Step-Down
DC/DC Converter
V : 4V to 40V, Transient to 60V, V = 1.21V, I = 2µA,
IN
SD
OUT(MIN)
Q
I
< 1µA, 3mm× 2mm DFN-10 and MSOP-10 Packages
58V with Transient Protection to 80V, 2A (I ), 2.4MHz, High
Efficiency Step-Down DC/DC Converter with Burst Mode Operation
V : 3.6V to 58V, Transient to 80V, V
= 0.8V, I = 85µA,
OUT(MIN) Q
OUT
IN
I
< 1µA, 3mm× 4mm DFN-16 and MSOP-16E Packages
SD
36941fb
LT 0312 REV B • PRINTED IN USA
28 LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
●
LINEAR TECHNOLOGY CORPORATION 2010
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
Linear [ Linear ]
