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LTC3543 Datasheet(PDF) 14 Page - Linear Technology

Part # LTC3543
Description  600mA Synchronous Step Down Buck Regulator with PLL, Soft-Start and Spread Spectrum
PDF  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3543 Datasheet(HTML) 14 Page - Linear Technology

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LTC3543
14
3543f
TYPICAL APPLICATIO S
APPLICATIO S I FOR ATIO
VOUT
R1
R2
SW
VIN
VFB
MODE
RUN
CFWD
CIN
L
GND
GND
VIN
CAP
COUT
3543 F08
C1
VIA TO GND
VIA TO VOUT
VIA TO R2
VIA TO R1
Figure 6. LTC3543 Suggested Layout
Li-Ion
BATTERY
2.7V TO 4.2V
3543 TA02
LTC3543
SW
VIN
VFB
CAP
RUN
MODE
GND
CFWD
10pF
COUT
4.7
µF**
L
3.3
µH*
10
µF†
† muRata GRM40X5R106K1H520
* TDK
VLCF5020-3R3N1R6
** TDK
TDKC2012X5R0J475MT
1.5V
VOUT
1.5V
R2
604k
R1
402k
EXPOSED
PAD
PWR_EN
20
µs/DIV
ILOAD
200mA/DIV
IL
200mA/DIV
VOUT
AC COUPLED
100mV/DIV
3543 G22
VIN = 3.6V
VOUT = 1.5V
ILOAD = 3mA TO 200mA
VMODE = 0V
LOAD CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3543 TA04
0
1
VIN = 3.6V
VOUT = 1.5V
VIN = 4.2V
VIN = 2.7V



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