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| LTC3547B_15 Datasheet, PDF (16/16 Pages) Linear Technology – Dual Monolithic 300mA Synchronous Step-Down Regulator | |||
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LTC3547B
TYPICAL APPLICATIO
Dual 300mA Buck Converter with Pulse Skip Mode
VIN
2.5V TO 5.5V
VOUT2
1.8V AT 300mA
C1
4.7μF
L2
4.7μH
CF2, 10pF
RUN2 VIN RUN1
SW2
SW1
LTC3547B
COUT2 R4
4.7μF 562k
VFB2
VFB1
R3
GND
280k
L1
4.7μH
CF1, 10pF
R1 R2
280k 887k
C1, COUT1, COUT2: TAIYO YUDEN JMK316BJ475ML
L1, L2: MURATA LQH32CN4R7M33
VOUT1
2.5V AT 300mA
COUT1
4.7μF
3547b TA02
1.8V/1.2V Dual 300mA Buck Converter with Pulse Skip Mode
VIN
2.5V TO 5.5V C1
4.7μF
VOUT2
1.2V AT 300mA
L2
4.7μH
COUT2
4.7μF
RUN2 VIN RUN1
SW2
SW1
LTC3547B-1
VFB2
VFB1
GND
L1
4.7μH
C1, COUT1, COUT2: TAIYO YUDEN JMK316BJ475ML
L1, L2: MURATA LQH32CN4R7M33
VOUT1
1.8V AT 300mA
COUT1
4.7μF
3547b TA03
RELATED PARTS
PART NUMBER DESCRIPTION
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600mA (IOUT), 550kHz, Synchronous Step-Down
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LTC1878
600mA (IOUT), 550kHz, Synchronous Step-Down
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1.2A (IOUT), 550kHz, Synchronous Step-Down DC/DC
Converter
LTC3403
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LTC3404
600mA (IOUT), 1.4MHz, Synchronous Step-Down
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LTC3405/LTC3405A 300mA (IOUT), 1.5MHz, Synchronous Step-Down
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LTC3406
600mA (IOUT), 1.5MHz, Synchronous Step-Down
DC/DC Converter
LTC3409
600mA (IOUT), 1.5MHz/2.25MHz, Synchronous
Step-Down DC/DC Converter
LTC3410
300mA (IOUT), 2.25MHz, Synchronous Step-Down
DC/DC Converter
LTC3411
1.25A (IOUT), 4MHz, Synchronous Step-Down
DC/DC Converter
LTC3412
2.5A (IOUT), 4MHz, Synchronous Step-Down
DC/DC Converter
LTC3440
600mA (IOUT), 2MHz, Synchronous Buck-Boost
DC/DC Converter
LTC3547
Dual 300mA (IOUT), 2.25MHz, Synchronous
Step-Down DC/DC Converter
ThinSOT is a trademark of Linear Technology Corporation
COMMENTS
95% Efï¬ciency, VIN: 2.7V to 10V, VOUT = 0.8V, IQ = 10μA,
ISD <1μA, MS8 Package
95% Efï¬ciency, VIN: 2.7V to 6V, VOUT = 0.8V, IQ = 10μA, ISD <1μA,
MS8 Package
95% Efï¬ciency, VIN: 2.7V to 10V, VOUT = 0.8V, IQ = 15μA,
ISD <1μA, TSSOP-16 Package
96% Efï¬ciency, VIN: 2.5V to 5.5V, VOUT = Dynamically Adjustable,
IQ = 20μA, ISD <1μA, DFN Package
95% Efï¬ciency, VIN: 2.7V to 6V, VOUT = 0.8V, IQ = 10μA,
ISD <1μA, MS8 Package
96% Efï¬ciency, VIN: 2.5V to 5.5V, VOUT = 0.8V, IQ = 20μA,
ISD <1μA, ThinSOT⢠Package
96% Efï¬ciency, VIN: 2.5V to 5.5V, VOUT = 0.6V, IQ = 20μA,
ISD <1μA, ThinSOT Package
95% Efï¬ciency, VIN: 1.6V to 5.5V, VOUT = 0.613V, IQ = 65μA,
DD8 Package
96% Efï¬ciency, VIN: 2.5V to 5.5V, VOUT(MIN) = 0.8V, IQ = 26μA,
ISD <1μA, SC70 Package
95% Efï¬ciency, VIN: 2.5V to 5.5V, VOUT = 0.8V, IQ = 60μA,
ISD <1μA, MS Package
95% Efï¬ciency, VIN: 2.5V to 5.5V, VOUT = 0.8V, IQ = 60μA,
ISD <1μA, TSSOP-16E Package
95% Efï¬ciency, VIN: 2.5V to 5.5V, VOUT = 2.5V, IQ = 25μA,
ISD <1μA, MS Package
96% Efï¬ciency, VIN: 2.5V to 5.5V, VOUT = 0.6V, IQ = 40μA,
ISD <1μA, DFN Package
16 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 â FAX: (408) 434-0507 â www.linear.com
3547bfb
LT 0807 REV B ⢠PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2007
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