LTC3780
TYPICAL APPLICATION
V
12V
5A
OUT
R
PU
22μF
16V, X7R
s 3
C
A
V
PULLUP
0.22μF
+
C
C
OUT
SS
1
24
23
330μF
16V
0.022μF
PGOOD BOOST1
2
D
SS
TG1
D2
Si7884DP
C
C2
LTC3780
+
B320A
D
A
47pF
BO540W
68pF
3
4
5
6
22
21
20
19
SENSE
SENSE
SW1
C
C1
C 0.1μF
F
R
–
C
C
V
0.01μF
IN
100k
Si7884DP
L
I
EXTV
4.7μH
TH
CC
CC
C
4.7μF
9mΩ
VCC
R1
8.06k, 1%
V
INTV
OSENSE
R2 113k, 1%
ON/OFF
7
8
18
17
16
15
SGND
RUN
BG1
PGND
BG2
9
B
D1
B340A
FCB
Si7884DP
10
PLLFLTR
SW2
D
B
10k
BO540W
C
22μF
35V
IN
A
11
12
14
13
+
PLLIN
TG2
Si7884DP
STBYMD BOOST2
2V
3.3μF
C
STBYMD
C 0.22μF
B
50V, X5R
10Ω
0.01μF
s 3
V
IN
100Ω
5V TO 32V
3780 TA02
100Ω
Figure 13. LTC3780 12V/5A, Buck-Boost Regulator
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
No R ™, 2.5V ≤ V ≤ 36V Burst Mode Operation, MSOP-10
LTC1871/LTC1871-1 SEPIC, Boost, Flyback Controller
LTC1871-7
SENSE
IN
Package
LTC3443
1.2A I , 600kHz, Synchronous Buck-Boost DC/DC
V : 2.4V to 5.5V, V : 2.4V to 5.25V, I = 28μA, I < 1μA,
OUT
IN
OUT
Q
SD
Converter
MS Package
LTC3444
500mA I , 1.5MHz Synchronous Buck-Boost DC/DC
V : 2.7V to 5.5V, V : 0.5V to 5.25V, Optimized for WCDMA RF
OUT
IN
OUT
Converter
Amplifier Bias
LTC3531/LTC3531-3 200mA I , Synchronous Buck-Boost DC/DC Converter
V : 1.8V to 5.5V, V : 2V to 5V, I = 35μA, I < 1μA,
OUT
IN
OUT
Q
SD
LTC3531-3.3
MS, DFN Packages
LTC3532
500mA I , 2MHz, Synchronous Buck-Boost DC/DC
V : 2.4V to 5.5V, V : 2.4V to 5.25V, I = 35μA, I < 1μA,
OUT
IN
OUT
Q
SD
Converter
MS, DFN Packages
LTC3533
2A Wide Input Voltage Synchronous Buck-Boost DC/DC
Converter
V : 1.8V to 5.5V, V : 1.8V to 5.25V, I = 40μA, I < 1μA,
IN
OUT
Q
SD
DFN Package
LTC3785/LTC3785-1 10V, High Efficiency, Synchronous, No R , Buck-Boost
SENSE
Controller
V : 2.7V to 10V, V : 2.7V to 10V, I = 86mA, I < 15μA,
IN
OUT
Q
SD
QFN-24 Package
LTC4444/LTC4444-5 High Voltage Synchronous N-Channel MOSFET Driver
V
IN
up to 100V, Used with the LTC3780 for Higher V Applications
IN
LTM4605
5A to 12A Buck-Boost μModule™
4.5V ≤ V ≤ 20V, 0.8V ≤ V
≤ 16V, 15mm × 15mm × 2.8mm
IN
OUT
LGA Package
LTM4607
5A to 12A Buck-Boost μModule
4.5V ≤ V ≤ 36V, 0.8V ≤ V
≤ 24V, 15mm × 15mm × 2.8mm
IN
OUT
LGA Package
No R
and μModule are trademarks of Linear Technology Corporation
SENSE
3780fe
LT 0309 REV E • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
28
●
●
© LINEAR TECHNOLOGY CORPORATION 2005
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
Linear Systems [ Linear Systems ]
