LTC3785-1 Linear Technology, LTC3785-1 Datasheet - Page 20

• Manufacturer Part Number: LTC3785-1
• Description: Buck-Boost Controller
• Manufacturer: Linear Technology

www.DataSheet4U.com
LTC3785-1
TYPICAL APPLICATION
RELATED PARTS
PART
NUMBER
LTC3443
LTC3444
LTC3531
LTC3531-3
LTC3531-3.3
LTC3532
LTC3533
LTC3780
LTC3785
LTM4605
LTM4607
20
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
DESCRIPTION
1.2A I
500mA I
200mA I
500mA I
2A Wide Input Voltage Synchronous Buck-Boost DC/DC Converter V
High Effi ciency, Synchronous, 4-Switch Buck-Boost Controller
10V, High Effi ciency, Synchronous, No R
Controller
5A to 12A Buck-Boost μModule
5A to 12A Buck-Boost μModule
OUT
66.5k
OUT
OUT
OUT
205k
66.5k
, 600kHz, Synchronous Buck-Boost DC/DC Converter
●
, 1.5MHz Synchronous Buck-Boost DC/DC Converter
, Synchronous Buck-Boost DC/DC Converter
, 2MHz, Synchronous Buck-Boost DC/DC Converter
FAX: [phone]
42.2k
59k
V
OUT
12k
205k
1.3k
1nF
270pF
100k
1nF
V
RUN/SS
FB
V
RT
PGOOD
MODE
I
CCM
LSET
SENSE
C
LTC3785-1
●
GND
V
www.linear.com
IN
I
SVOUT
V
I
V
I
SSW1
SSW2
I
V
SW1
SW2
BST1
BST2
SVIN
BG1
BG2
SENSE
TG1
TG2
V
DRV
CC
Li-Ion/9V Wall Adapter to 5V/2A
, Buck-Boost
CMDSH-3
CMDSH-3
C
0.22μF
0.22μF
A
C
B
4.7μF
C
VCC
MA
MB
MD
MC
2.7V TO 10V
COMMENTS
V
MS Package
V
Amplifi er Bias
V
MS, DFN Packages
V
MS, DFN Packages
DFN Package
V
SSOP-24, QFN-32 Packages
V
QFN-24 Package
4.5V ≤ V
LGA Package
4.5V ≤ V
LGA Package
IN
IN
IN
IN
IN
IN
IN
V
: 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
: 4V to 36V, V
: 2.7V to 10V, V
IN
OPTIONAL
OPTIONAL
C
22μF
IN
IN
IN
D1
D2
≤ 20V, 0.8V ≤ V
≤ 36V, 0.8V ≤ V
OUT
MA = MB = MC = MD = 1/2 Si7940DY
L1 = RLF7030T-3R3M4R1
D1 = D2 = PMEG2020EJ
OUT
L1
3.3μH
OUT
OUT
OUT
OUT
OUT
+
: 0.8V to 30V, I
: 2.7V to 10V, I
C
100μF
: 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
9V REGULATED
WALL ADAPTER
OUT
Li-Ion
2.7V TO 4.2V
OUT
OUT
37851 TA03
≤ 16V, 15mm × 15mm × 2.8mm
≤ 24V, 15mm × 15mm × 2.8mm
© LINEAR TECHNOLOGY CORPORATION 2008
V
5V
2A
OUT
Q
Q
= 35μA, I
Q
= 1.5mA, I
= 86mA, I
Q
Q
Q
= 28μA, I
= 35μA, I
= 40μA, I
SD
SD
< 1μA,
LT 0908 • PRINTED IN USA
SD
< 55μA,
SD
SD
SD
< 15μA,
< 1μA,
< 1μA,
< 1μA,
37851f