LTC3543_15 Datasheet, PDF (20/20 Pages) Linear Technology – 600mA Synchronous Step Down Buck Regulator with PLL, Soft-Start and Spread Spectrum

LTC3543
TYPICAL APPLICATION
Li-Ion
BATTERY
2.7V TO 4.2V
V_IN
SW
10μF†
LTC3543
PWR_EN RUN V_FB
MODE CAP
INPUT CLOCK (1MHz)
GND
EXPOSED
PAD
L, 6.8μH*
R2
604k
R1
C1
402k
2.2nF
3543 TA09
PLL Application
1.5V
C_FWD
10pF
V_OUT
C_OUT ^1.5V
4.7μF**
† MURATA GRM40X5R106K1H520
* CoEv DN4835-6R8
** TDK TDKC2012X5R0J475MT
INPUT CLOCK
2V/DIV
SW
2V/DIV
200ns/DIV
3543 TA10
100
90
80
70
60
50
40
30
20
10
0
0.1
1
10
100
LOAD CURRENT (mA)
1000
3543 TA11
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LTC3405/LTC3405A
300mA (I_OUT), 1.5MHz, Synchronous Step-Down 95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.8V, I_Q = 20μA,
DC/DC Converter
I_SD = <1μA, ThinSOT™ Package
LTC3406/LTC3406B
600mA (I_OUT), 1.5MHz, Synchronous Step-Down 96% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.6V, I_Q = 20μA,
DC/DC Converter
I_SD = <1μA, ThinSOT Package
LTC3407/LTC3407-2 Dual 600mA/800mA (I_OUT), 1.5MHz/2.25MHz,
Synchronous Step-Down DC/DC Converter
95% Efficiency, 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- 96% Efficiency, V_IN: 1.6V to 5.5V, V_OUT(MIN) = 0.6V, I_Q = 65μA,
Down DC/DC Converter
I_SD = <1μA, DFN Package
LTC3410/LTC3410B
300mA (I_OUT), 2.25MHz, Synchronous Step-Down 95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.8V, I_Q = 26μA,
DC/DC Converter
I_SD = <1μA, SC70 Package
LTC3411
1.25A (I_OUT), 4MHz, Synchronous Step-Down
DC/DC Converter
95% Efficiency, 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% Efficiency, 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/ 200mA (I_OUT), 1.5MHz, Synchronous Buck-Boost 95% Efficiency, V_IN: 1.8V to 5.5V, V_OUT(MIN): 2V to 5V, I_Q = 16μA,
LTC3531-3.3
DC/DC Converter
I_SD = <1μA, ThinSOT and DFN Packages
LTC3532
500mA (I_OUT), 2MHz, Synchronous Buck-Boost
DC/DC Converter
96% Efficiency, 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 95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.6V, I_Q = 26μA,
DC/DC Converter
I_SD = <1μA, 2mm × 2mm DFN and ThinSOT Packages
LTC3547/LTC3547B
Dual 300mA (I_OUT), 2.25MHz,
Synchronous Step-Down DC/DC Converter
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.6V, I_Q = 40μA,
I_SD = <1μA, DFN Package
LTC3548/LTC3548-1/ Dual 400mA/800mA (I_OUT), 2.25MHz, Synchronous 95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.6V, I_Q = 40μA,
LTC3548-2
Step-Down DC/DC Converter
I_SD = <1μA, MS10E and DFN Packages
LTC3561
1.25A (I_OUT), 4MHz, Synchronous Step-Down
DC/DC Converter
95% Efficiency, 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.
3543fa
20 Linear Technology Corporation
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LT 0509 REV A • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2006