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LTC6906 Datasheet(PDF) 24 Page - Analog Devices

Part # LTC6906
Description  Voltage-Controlled Pulse Width Modulator (PWM)
PDF  34 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LTC6906 Datasheet(HTML) 24 Page - Analog Devices

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LTC6992-1/LTC6992-2/
LTC6992-3/LTC6992-4
24
Rev. D
For more information www.analog.com
TYPICAL APPLICATIONS
Figure 12. Supply Bypassing and PCB Layout
Constant On-Time Modulator
6992 TA02
LTC6992-1
MOD
GND
SET
OUT
V+
DIV
RM2
9.31k
RM1
1.05k
RSET
44.2k
RIN*
11.8k
VCTRL
VMOD
VSET
VIN
0V TO 2V
R1
182k
DIVCODE = 2
(÷16, POL = 1)
C1
0.1µF
OUT
R2
976k
VCC
*OPTIONAL RESISTOR ADJUSTS FOR DESIRED VIN RANGE.
AS VIN INCREASES, tOUT INCREASES AND DUTY CYCLE
DECREASES (BECAUSE POL = 1) TO MAINTAIN A CONSTANT tON.
FOR CONSTANT OFF-TIME, JUST CHANGE DIVCODE SO POL = 0.
IF
RM2
RM1+RM2
= 0.9 THEN tON = NDIV • 1.125µs •
RSET
50k
APPLICATIONS INFORMATION
6992 F14
LTC6992
MOD
GND
SET
OUT
V+
DIV
C1
0.1µF
R1
R2
RSET
V+
MOD
GND
SET
OUT
V+
DIV
V+
DIV
SET
OUT
GND
MOD
R1
R2
C1
RSET
V+
C1
R1
R2
V+
RSET
TSOT-23 PACKAGE
DFN PACKAGE



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