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| LTC3780_12 Datasheet, PDF (28/28 Pages) Linear Technology – High Effi ciency, Synchronous, 4-Switch Buck-Boost Controller | |||
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LTC3780
TYPICAL APPLICATION
CSS
0.022μF
CC2
47pF
CC1
0.01μF
RC
100k
R1
8.06k, 1% R2 113k, 1%
ON/OFF
10k
68pF
RPU
VPULLUP
CA
0.22μF
1
24
PGOOD BOOST1
2
SS
23
TG1
LTC3780
3 SENSE+
22
SW1
DA
BO540W
4 SENSEâ
21
VIN
5
20
ITH
EXTVCC
6
19
VOSENSE INTVCC
7
SGND
8
RUN
9
FCB
10
PLLFLTR
BG1 18
PGND 17
BG2 16
SW2 15
DB
BO540W
CF 0.1μF
CVCC 4.7μF
9mΩ
11 PLLIN
TG2 14
2V
12 STBYMD BOOST2 13
CSTBYMD
0.01μF
10Ω
100Ω
100Ω
CB 0.22μF
22μF
16V, X7R
s3
+
D
Si7884DP
D2
B320A
VOUT
12V
5A
COUT
330μF
16V
C
Si7884DP
L
4.7μH
B
D1
Si7884DP B340A
A
Si7884DP
CIN
+
22μF
35V
3.3μF
50V, X5R
s3
3780 TA02
VIN
5V TO 32V
Figure 13. LTC3780 12V/5A, Buck-Boost Regulator
RELATED PARTS
PART NUMBER
DESCRIPTION
LTC1871/LTC1871-1 SEPIC, Boost, Flyback Controller
LTC1871-7
LTC3443
1.2A IOUT, 600kHz, Synchronous Buck-Boost DC/DC
Converter
LTC3444
500mA IOUT, 1.5MHz Synchronous Buck-Boost DC/DC
Converter
LTC3531/LTC3531-3 200mA IOUT, Synchronous Buck-Boost DC/DC Converter
LTC3531-3.3
LTC3532
500mA IOUT, 2MHz, Synchronous Buck-Boost DC/DC
Converter
LTC3533
2A Wide Input Voltage Synchronous Buck-Boost DC/DC
Converter
LTC3785/LTC3785-1 10V, High Efï¬ciency, Synchronous, No RSENSE, Buck-Boost
Controller
LTC4444/LTC4444-5 High Voltage Synchronous N-Channel MOSFET Driver
LTM4605
5A to 12A Buck-Boost μModuleâ¢
LTM4607
5A to 12A Buck-Boost μModule
No RSENSE and μModule are trademarks of Linear Technology Corporation
28 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 â FAX: (408) 434-0507 â www.linear.com
COMMENTS
No RSENSEâ¢, 2.5V ⤠VIN ⤠36V Burst Mode Operation, MSOP-10
Package
VIN: 2.4V to 5.5V, VOUT: 2.4V to 5.25V, IQ = 28μA, ISD < 1μA,
MS Package
VIN: 2.7V to 5.5V, VOUT: 0.5V to 5.25V, Optimized for WCDMA RF
Ampliï¬er Bias
VIN: 1.8V to 5.5V, VOUT: 2V to 5V, IQ = 35μA, ISD < 1μA,
MS, DFN Packages
VIN: 2.4V to 5.5V, VOUT: 2.4V to 5.25V, IQ = 35μA, ISD < 1μA,
MS, DFN Packages
VIN: 1.8V to 5.5V, VOUT: 1.8V to 5.25V, IQ = 40μA, ISD < 1μA,
DFN Package
VIN: 2.7V to 10V, VOUT: 2.7V to 10V, IQ = 86mA, ISD < 15μA,
QFN-24 Package
VIN up to 100V, Used with the LTC3780 for Higher VIN Applications
4.5V ⤠VIN ⤠20V, 0.8V ⤠VOUT ⤠16V, 15mm à 15mm à 2.8mm
LGA Package
4.5V ⤠VIN ⤠36V, 0.8V ⤠VOUT ⤠24V, 15mm à 15mm à 2.8mm
LGA Package
3780fe
LT 0309 REV E ⢠PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2005
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