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| LTC3785 Datasheet, PDF (18/20 Pages) Linear Technology – 10V, High Effi ciency, Synchronous, No RSENSE Buck-Boost Controller | |||
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LTC3785
TYPICAL APPLICATIO
1nF
124k 205k
VIN
RUN/SS
VSENSE
VCC
ISVIN
TG1
R1
205k
R2
121k
270pF
VBST1
1.3k
1nF
12k
SW1
ISSW1
VDRV
FB
BG1
LTC3785
VC
RT
ISVOUT
RT
59k
TG2
RILSET
42.2k
MODE
VBST2
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
CIN
MA
22µF
MA = MB = MC = MD = 1/2 Si7940DY
L1 = SUMIDA CE123-4R6
D1 = D2 = PMEG2020EJ
OPTIONAL
D1
L1
MB
4.7µH
OPTIONAL
MD
D2
VOUT
3.3V
3A
COUT
100µF
MC
3785 TA02
3785f
18
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