LTC3547B
16
3547bfb
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2007
LT 0807 REV B • PRINTED IN USA
TYPICAL APPLICATIO
U
RELATED PARTS
V
IN
RUN2 RUN1
LTC3547B
V
FB2
SW2
SW1
V
FB1
C
F2
, 10pF C
F1
, 10pF
GND
V
IN
2.5V TO 5.5V
V
OUT2
1.8V AT 300mA
V
OUT1
2.5V AT 300mA
3547b TA02
R3
280k
R1
280k
R4
562k
L2
4.7μH
L1
4.7μH
R2
887k
C
OUT2
4.7μF
C1
4.7
μF
C
OUT1
4.7μF
C1, C
OUT1
, C
OUT2
: TAIYO YUDEN JMK316BJ475ML
L1, L2: MURATA LQH32CN4R7M33
PART NUMBER DESCRIPTION COMMENTS
LTC1877 600mA (I
OUT
), 550kHz, Synchronous Step-Down
DC/DC Converter
95% Effi ciency, V
IN
: 2.7V to 10V, V
OUT
= 0.8V, I
Q
= 10μA,
I
SD
<1μA, MS8 Package
LTC1878 600mA (I
OUT
), 550kHz, Synchronous Step-Down
DC/DC Converter
95% Effi ciency, V
IN
: 2.7V to 6V, V
OUT
= 0.8V, I
Q
= 10μA, I
SD
<1μA,
MS8 Package
LTC1879 1.2A (I
OUT
), 550kHz, Synchronous Step-Down DC/DC
Converter
95% Effi ciency, V
IN
: 2.7V to 10V, V
OUT
= 0.8V, I
Q
= 15μA,
I
SD
<1μA, TSSOP-16 Package
LTC3403 600mA (I
OUT
), 1.5MHz, Synchronous Step-Down
DC/DC Converter with Bypass Transistor
96% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT
= Dynamically Adjustable,
I
Q
= 20μA, I
SD
<1μA, DFN Package
LTC3404 600mA (I
OUT
), 1.4MHz, Synchronous Step-Down
DC/DC Converter
95% Effi ciency, V
IN
: 2.7V to 6V, V
OUT
= 0.8V, I
Q
= 10μA,
I
SD
<1μA, MS8 Package
LTC3405/LTC3405A 300mA (I
OUT
), 1.5MHz, Synchronous Step-Down
DC/DC Converter
96% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT
= 0.8V, I
Q
= 20μA,
I
SD
<1μA, ThinSOT™ Package
LTC3406 600mA (I
OUT
), 1.5MHz, Synchronous Step-Down
DC/DC Converter
96% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT
= 0.6V, I
Q
= 20μA,
I
SD
<1μA, ThinSOT Package
LTC3409 600mA (I
OUT
), 1.5MHz/2.25MHz, Synchronous
Step-Down DC/DC Converter
95% Effi ciency, V
IN
: 1.6V to 5.5V, V
OUT
= 0.613V, I
Q
= 65μA,
DD8 Package
LTC3410 300mA (I
OUT
), 2.25MHz, Synchronous Step-Down
DC/DC Converter
96% 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
= 0.8V, I
Q
= 60μA,
I
SD
<1μA, MS Package
LTC3412 2.5A (I
OUT
), 4MHz, Synchronous Step-Down
DC/DC Converter
95% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT
= 0.8V, I
Q
= 60μA,
I
SD
<1μA, TSSOP-16E Package
LTC3440 600mA (I
OUT
), 2MHz, Synchronous Buck-Boost
DC/DC Converter
95% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT
= 2.5V, I
Q
= 25μA,
I
SD
<1μA, MS Package
LTC3547 Dual 300mA (I
OUT
), 2.25MHz, Synchronous
Step-Down DC/DC Converter
96% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT
= 0.6V, I
Q
= 40μA,
I
SD
<1μA, DFN Package
ThinSOT is a trademark of Linear Technology Corporation
Dual 300mA Buck Converter with Pulse Skip Mode
V
IN
RUN2 RUN1
LTC3547B-1
V
FB2
SW2
SW1
V
FB1
GND
V
IN
2.5V TO 5.5V
V
OUT2
1.2V AT 300mA
V
OUT1
1.8V AT 300mA
3547b TA03
L2
4.7
μH
L1
4.7μH
C
OUT2
4.7μF
C1
4.7
μF
C
OUT1
4.7μF
C1, C
OUT1
, C
OUT2
: TAIYO YUDEN JMK316BJ475ML
L1, L2: MURATA LQH32CN4R7M33
1.8V/1.2V Dual 300mA Buck Converter with Pulse Skip Mode
