Datasheet

LTC3785
20
3785fc
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2007
LT 0310 REV C • PRINTED IN USA
Typical applicaTion
PART NUMBER DESCRIPTION COMMENTS
LTC3780 High Efficiency (Up to 98%), Synchronous
4-Switch Buck-Boost Controller
4V ≤ V
IN
≤ 36V, 0.8V ≤ V
OUT
≤ 30V, SSOP-24, 5mm × 5mm QFN-32
LTM4605 High Efficiency Buck-Boost DC/DC µModule
Complete Power Supply
4.5V ≤ V
IN
≤ 20V, 0.8V ≤ V
OUT
≤ 16V, 15mm × 15mm × 2.8mm
LTM4607 High Efficiency Buck-Boost DC/DC µModule
Complete Power Supply
4.5V ≤ V
IN
≤ 36V, 0.8V ≤ V
OUT
≤ 25V, 15mm × 15mm × 2.8mm
LTM4609 High Efficiency Buck-Boost DC/DC µModule
Complete Power Supply
4.5V ≤ V
IN
≤ 36V, 0.8V ≤ V
OUT
≤ 34V, 15mm × 15mm × 2.8mm
LTC3533 2A Synchronous Buck-Boost Monolithic DC/DC
Converter
1.8V ≤ V
IN
≤ 5.5V, 1.8V ≤ V
OUT
≤ 5.25V, I
Q
= 40µA, I
SD
< 1µA, 3mm × 4mm DFN-14
LTC3441 1.2A Synchronous Buck-Boost Monolithic DC/DC
Converter
2.4V ≤ V
IN
≤ 5.5V, 2.4V ≤ V
OUT
≤ 5.25V, I
Q
= 25µA, I
SD
< 1µA, 3mm × 4mm DFN-12
LTC3440 600mA Synchronous Buck-Boost Monolithic
DC/DC Converter
2.5V ≤ V
IN
≤ 5.5V, 2.5V ≤ V
OUT
≤ 5.5V, I
Q
= 25µA, I
SD
< 1µA, 3mm × 3mm DFN-10,
MSOP-10
LTC3444 500mA Synchronous Buck-Boost Monolithic
DC/DC Converter
2.7V ≤ V
IN
≤ 5.5V, ≤ 0.5V V
OUT
≤ 5.25V, Optimized for WCDMA RF Amplifier Bias,
3mm × 3mm DFN-8
LTC3532 500mA Synchronous Buck-Boost Monolithic
DC/DC Converter
2.4V ≤ V
IN
≤ 5.5V, 2.4V ≤ V
OUT
≤ 5.25V, I
Q
= 35µA, I
SD
< 1µA, 3mm × 3mm DFN-10,
MSOP-10
LTC3531
LTC3531-3
LTC3531-3.3
200mA Synchronous Buck-Boost Monolithic
DC/DC Converter
1.8V ≤ V
IN
≤ to 5.5V, 2V ≤ V
OUT
≤ 5V, I
Q
= 35µA, I
SD
< 1µA, 3mm × 3mm DFN-8,
ThinSOT-23
µModule is a registered trademark of Linear Technology Corporation.
V
CC
I
SVIN
TG1V
SENSE
BG1FB
V
C
TG2
BG2
SW2
3785 TA03
V
BST1
SW1
I
SSW1
I
SVOUT
RT
V
DRV
I
SSW2
V
BST2
CCM
I
LSET
MODE
RUN/SS
V
IN
1nF
1nF
205k
270pF
1.3k205k
12k
59k
66.5k
42.2k
66.5k
LTC3785
GND
C
VCC
4.7µF
Li-Ion
2.7V TO 4.2V
MA = MB = MC = MD = 1/2 Si7940DY
L1 = RLF7030T-3R3M4R1
D1 = D2 = PMEG2020EJ
9V REGULATED
WALL ADAPTER
V
IN
2.7V TO 10V
V
OUT
5V
2A
C
IN
22µF
MA
MB
D1
D2
OPTIONAL
OPTIONAL
MD
MC
C
A
0.22µF
C
B
0.22µF
CMDSH-3
CMDSH-3
L1
3.3µH
C
OUT
100µF
+
Li-Ion/9V Wall Adapter to 5V/2A
relaTeD parTs