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| LTC3785-1 Datasheet, PDF (20/20 Pages) Linear Technology – 10V, High Effi ciency, Buck-Boost Controller with Power Good | |||
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LTC3785-1
TYPICAL APPLICATION
Li-Ion/9V Wall Adapter to 5V/2A
1nF
66.5k 205k
VIN
RUN/SS
VSENSE
VCC
ISVIN
TG1
270pF
VBST1
205k
1.3k
1nF
66.5k 12k
59k
SW1
ISSW1
VDRV
FB
BG1
LTC3785-1
VC
RT
ISVOUT
100k
TG2
VOUT
PGOOD
MODE
VBST2
42.2k
ILSET
SW2
ISSW2
CCM
BG2
GND
VIN
2.7V TO 10V
CVCC
4.7μF
9V REGULATED
WALL ADAPTER
+ Li-Ion
2.7V TO 4.2V
CMDSH-3
CA
0.22μF
CMDSH-3
CB
0.22μF
MA
CIN
22μF
MA = MB = MC = MD = 1/2 Si7940DY
L1 = RLF7030T-3R3M4R1
D1 = D2 = PMEG2020EJ
OPTIONAL
MB
D1
L1
3.3μH
MD
OPTIONAL
D2
VOUT
5V
2A
COUT
MC
100μF
37851 TA03
RELATED PARTS
PART
NUMBER
DESCRIPTION
COMMENTS
LTC3443
1.2A IOUT, 600kHz, Synchronous Buck-Boost DC/DC Converter
VIN: 2.4V to 5.5V, VOUT: 2.4V to 5.25V, IQ = 28μA, ISD < 1μA,
MS Package
LTC3444
500mA IOUT, 1.5MHz Synchronous Buck-Boost DC/DC Converter VIN: 2.7V to 5.5V, VOUT: 0.5V to 5.25V, Optimized for WCDMA RF
Ampliï¬er Bias
LTC3531
LTC3531-3
200mA IOUT, Synchronous Buck-Boost DC/DC Converter
LTC3531-3.3
VIN: 1.8V to 5.5V, VOUT: 2V to 5V, IQ = 35μA, ISD < 1μA,
MS, DFN Packages
LTC3532
500mA IOUT, 2MHz, Synchronous Buck-Boost DC/DC Converter VIN: 2.4V to 5.5V, VOUT: 2.4V to 5.25V, IQ = 35μA, ISD < 1μA,
MS, DFN Packages
LTC3533
2A Wide Input Voltage Synchronous Buck-Boost DC/DC Converter VIN: 1.8V to 5.5V, VOUT: 1.8V to 5.25V, IQ = 40μA, ISD < 1μA,
DFN Package
LTC3780
High Efï¬ciency, Synchronous, 4-Switch Buck-Boost Controller
VIN: 4V to 36V, VOUT: 0.8V to 30V, IQ = 1.5mA, ISD < 55μA,
SSOP-24, QFN-32 Packages
LTC3785
10V, High Efï¬ciency, Synchronous, No RSENSE, Buck-Boost
Controller
VIN: 2.7V to 10V, VOUT: 2.7V to 10V, IQ = 86mA, ISD < 15μA,
QFN-24 Package
LTM4605
5A to 12A Buck-Boost μModule
4.5V ⤠VIN ⤠20V, 0.8V ⤠VOUT ⤠16V, 15mm à 15mm à 2.8mm
LGA Package
LTM4607
5A to 12A Buck-Boost μModule
4.5V ⤠VIN ⤠36V, 0.8V ⤠VOUT ⤠24V, 15mm à 15mm à 2.8mm
LGA Package
37851f
20 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 â FAX: (408) 434-0507 â www.linear.com
LT 0908 ⢠PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2008
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