LT3782
20
3782fg
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2007
LT 0109 REV G • PRINTED IN USA
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LT
®
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IN
Up to 36V
LTC1696 Overvoltage Protection Controller 0.8V ≤ V
IN
≤ 24V, ±2% Overvoltage Threshold Accuracy, ThinSOT™ Package
LTC1700 No R
SENSE
™
Synchronous Step-Up Controller Up to 95% Effi ciency, Operation as Low as 0.9V Input
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IN
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LTC3425 5A, 8MHz 4-Phase Monolithic Step-Up DC/DC
Converter
0.5V ≤ V
IN
≤ 4.5V, 2.4V ≤ V
OUT
≤ 5.25V, Very Low Output Ripple
LTC3703/LTC3703-5 100V and 60V, Step-Down and Step-Up DC/DC
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High Effi ciency Synchronous Operation, High Voltage Operation,
No Transformer Required
LTC3728 Dual, 550kHz, 2-Phase Synchronous
Step-Down Controller
Dual 180° Phased Controllers, V
IN
: 3.5V to 35V, 99% Duty Cycle,
5mm × 5mm QFN, SSOP-28 Packages
LTC3729 20A to 200A, 550kHz PolyPhase™ Synchronous
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Expandable from 2-Phase to 12-Phase, Uses All Surface Mount Components,
V
IN
Up to 36V
LTC3731 3- to 12-Phase Step-Down Synchronous
Controller
60A to 240A Output Current, 0.6V ≤ V
OUT
≤ 6V, 4.5V ≤ V
IN
≤ 32V
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Operation
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Designs, Current Mode, 3mm × 4mm 12-Pin DFN Package
10Ω
CS2
C
OUT2
330μF, 35V, 2x
+
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, 4x
10nF
BAS516
1μF
3782 TA03
V
INB
0V TO 28V*
V
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
UPS840
L2
10μH
D2
UPS840
CS1
CS2
0.004Ω
0.004Ω
• •
LT3782
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
28V Output Base Station Power Converter with Redundant Input
PolyPhase is a registered trademark of Linear Technology Corporation. ThinSOT and No R
SENSE
are trademarks of Linear Technology Corporation.
TYPICAL APPLICATIONS
