LT3782A
20
3782afc
For more information www.linear.com/LT3782A
LINEAR TECHNOLOGY CORPORATION 2008
LT 0414 REV C • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/LT3782A
relaTeD parTs
PART NUMBER DESCRIPTION COMMENTS
LTC3862/LTC3862-1 Multiphase Current Mode Step-Up DC/DC
Controller
2.5V ≤ V
IN
≤ 32V, 5V or 10V Gate Drive, 75kHz to 500kHz, TSSOP-24,
SSOP-24, 5mm × 5mm QFN-24
LTC3788/LTC3788-1 Multiphase, Dual Output Synchronous Step-Up
Controller
2.5V ≤ V
IN
≤ 38V, V
OUT
Up to 60V, 50kHz to 900kHz, 5mm × 5mm QFN-32,
SSOP-28
LTC3813 100V Maximum V
OUT
Current Mode
Synchronous Step-Up DC/DC Controller
No R
SENSE
™, 1Ω Gate Driver, Adjustable Off-Time, SSOP-28
LTC3814-5 60V Maximum V
OUT
Current Mode Synchronous
Step-Up DC/DC Controller
No R
SENSE
, 1Ω Gate Driver, Adjustable Off-Time, TSSOP-16
LTC1871/LTC1871-1/
LTC1871-7
Wide Input Range, No R
SENSE
Low Quiescent
Current Flyback, Boost and SEPIC DC/DC
Controller
Adjustable Fixed Synchronizable 50kHz to 1MHz Operating Frequency,
2.5V ≤ V
IN
≤ 36V, MSOP-10
LT3757 Boost, Flyback, SEPIC and Inverting DC/DC
Controller
2.9V ≤ V
IN
≤ 40V, Adjustable Fixed Synchronizable 100kHz to 1MHz Operating
Frequency, 3mm × 3mm DFN-10 and MSOP-10E
LT3758 Boost, Flyback, SEPIC and Inverting DC/DC
Controller
5.5V ≤ V
IN
≤ 100V, Adjustable Fixed Synchronizable 100kHz to 1MHz Operating
Frequency, 3mm × 3mm DFN-10 and MSOP-10E
LTC3805/LTC3805-5 Adjustable Frequency Boost, Flyback and SEPIC
DC/DC Controller
V
IN
and V
OUT
Limited Only by External Components, 3mm × 3mm DFN-10,
MSOP-10E
LTC3803/LTC3803-3/
LTC3803-5
Flyback DC/DC Controller with Fixed 200kHz or
300kHz Operating Frequency
V
IN
and V
OUT
Limited Only by External Components, 6-Pin ThinSOT™ Package
LTC3872 No R
SENSE
Current Mode Boost DC/DC
Controller
550kHz Fixed Frequency, 2.75V ≤ V
IN
≤ 9.8V, ThinSOT Package
LTC3780 High Efficiency Synchronous 4-Switch
Buck-Boost DC/DC Controller
4V ≤ V
IN
≤ 36V, 0.8V ≤ V
OUT
≤ 30V, SSOP-24, 5mm × 5mm QFN-32
28V Output Base Station Power Converter with Redundant Input
Typical applicaTion
10Ω
CS2
C
OUT2
330µF, 35V, ×2
+
BAS516
27
26
25
24
23
22
21
20
19
18
17
16
15
28
2
3
4
5
6
7
8
9
10
11
12
13
14
1
10Ω
CS1
59k
82k
274k
825k
2R2
24.9k
261k
R
C1
15k
10nF
C
INA
22µF
C
INB
22µF
4.7nF
C
C2
100pF
C
C1
4.7nF
2.2µF
C
OUT1
10µF, 50V, ×4
10nF
BAS516
1µF
3782A TA03
V
INB
0V TO 28V*
INA
0V TO 28V*
Q1
PH4840S
Q2
PH4840S
OUTPUT
28V
4A (8A**)
NOTE:
*INPUT VOLTAGE RANGE FOR VINA AND VINB IS 0V TO 28V.
AT LEAST ONE OF THE INPUTS MUST BE 12V OR HIGHER.
L1, L2: PULSE PB2020-103
ALL CERAMIC CAPACITORS ARE X7R, TDK
**OUTPUT CURRENT WITH BOTH INPUTS 12V OR HIGHER
L1
10µH
D1
PDS1040
L2
10µH
D2
PDS1040
CS1
CS2
0.004Ω
0.004Ω
• •
LT3782A
V
CC
NC
NC
V
EE1
BGATE1
GBIAS1
GBIAS2
BGATE2
V
EE2
NC
RUN
FB
V
C
GBIAS
SGATE1
NC
GND
SYNC
DELAY
DCL
SENSE1
+
SENSE1
–
SLOPE
R
SET
SENSE2
–
SENSE2
+
SS
SGATE2
