LTC3543
20
3543fa
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2006
LT 0509 REV A • PRINTED IN USA
PART NUMBER DESCRIPTION COMMENTS
LTC3405/LTC3405A 300mA (I
OUT
), 1.5MHz, Synchronous Step-Down
DC/DC Converter
95% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.8V, I
Q
= 20μA,
I
SD
= <1μA, ThinSOT™ Package
LTC3406/LTC3406B 600mA (I
OUT
), 1.5MHz, Synchronous Step-Down
DC/DC Converter
96% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 20μA,
I
SD
= <1μA, ThinSOT Package
LTC3407/LTC3407-2 Dual 600mA/800mA (I
OUT
), 1.5MHz/2.25MHz,
Synchronous Step-Down DC/DC Converter
95% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 40μA,
I
SD
= <1μA, MS10E and DFN Packages
LTC3409 600mA (I
OUT
), 1.7MHz/2.6MHz, Synchronous Step-
Down DC/DC Converter
96% Effi ciency, V
IN
: 1.6V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 65μA,
I
SD
= <1μA, DFN Package
LTC3410/LTC3410B 300mA (I
OUT
), 2.25MHz, Synchronous Step-Down
DC/DC Converter
95% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.8V, I
Q
= 26μA,
I
SD
= <1μA, SC70 Package
LTC3411 1.25A (I
OUT
), 4MHz, Synchronous Step-Down
DC/DC Converter
95% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.8V, I
Q
= 60μA,
I
SD
= <1μA, MS10 and DFN Packages
LTC3441/LTC3442/
LTC3443
1.2A (I
OUT
), 2MHz, Synchronous Buck-Boost
DC/DC Converter
95% Effi ciency, V
IN
: 2.4V to 5.5V, V
OUT(MIN)
: 2.4V to 5.25V, I
Q
= 50μA,
I
SD
= <1μA, DFN Package
LTC3531/LTC3531-3/
LTC3531-3.3
200mA (I
OUT
), 1.5MHz, Synchronous Buck-Boost
DC/DC Converter
95% Effi ciency, V
IN
: 1.8V to 5.5V, V
OUT(MIN)
: 2V to 5V, I
Q
= 16μA,
I
SD
= <1μA, ThinSOT and DFN Packages
LTC3532 500mA (I
OUT
), 2MHz, Synchronous Buck-Boost
DC/DC Converter
96% Effi ciency, V
IN
: 2.4V to 5.5V, V
OUT(MIN)
: 2.4V to 5.25V, I
Q
= 35μA,
I
SD
= <1μA, MS10 and DFN Packages
LTC3542 500mA (I
OUT
), 2.25MHz, Synchronous Step-Down
DC/DC Converter
95% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 26μA,
I
SD
= <1μA, 2mm × 2mm DFN and ThinSOT Packages
LTC3547/LTC3547B Dual 300mA (I
OUT
), 2.25MHz,
Synchronous Step-Down DC/DC Converter
95% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 40μA,
I
SD
= <1μA, DFN Package
LTC3548/LTC3548-1/
LTC3548-2
Dual 400mA/800mA (I
OUT
), 2.25MHz, Synchronous
Step-Down DC/DC Converter
95% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 40μA,
I
SD
= <1μA, MS10E and DFN Packages
LTC3561 1.25A (I
OUT
), 4MHz, Synchronous Step-Down
DC/DC Converter
95% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.8V, I
Q
= 240μA,
I
SD
= <1μA, DFN Package
ThinSOT is a trademark of Linear Technology Corporation.
Li-Ion
BATTERY
2.7V TO 4.2V
3543 TA09
C1
2.2nF
LTC3543
SWV
IN
V
FB
CAP
RUN
MODE
GND
C
FWD
10pF
C
OUT
4.7μF**
L, 6.8μH*
10μF†
1.5V
V
OUT
1.5V
R2
604k
R1
402k
EXPOSED
PAD
PWR_EN
INPUT CLOCK (1MHz)
† MURATA GRM40X5R106K1H520
* CoEv DN4835-6R8
** TDK TDKC2012X5R0J475MT
200ns/DIV
SW
2V/DIV
INPUT CLOCK
2V/DIV
3543 TA10
LOAD CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.1 10 100 1000
3543 TA11
0
1
PLL Application
TYPICAL APPLICATION
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