LTC1871-1 LINER [Linear Technology], LTC1871-1 Datasheet - Page 28

• Manufacturer Part Number: LTC1871-1
• Description: High Effi ciency, Synchronous, 4-Switch Buck-Boost Controller
• Manufacturer: LINER [Linear Technology]

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