LTC6992HS6-2 데이터 시트보기 (PDF) - Analog Devices
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LTC6992HS6-2 Datasheet PDF : 34 Pages
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LTC6992-1/LTC6992-2/
LTC6992-3/LTC6992-4
APPLICATIONS INFORMATION
MOD OUT
LTC6992
GND
V+
SET
DIV
RSET
C1
0.1µF
V+
R1
R2
V+
R1
R2
C1
V+
DIV
SET
RSET
OUT
GND
MOD
DFN PACKAGE
MOD
GND
SET
RSET
C1
V+
OUT
V+
DIV
R1
R2
TSOT-23 PACKAGE
6992 F14
Figure 12. Supply Bypassing and PCB Layout
TYPICAL APPLICATIONS
Constant On-Time Modulator
VIN
0V TO 2V
VMOD
RIN*
11.8k VCTRL
RM1
1.05k
RM2
9.31k
RSET
44.2k
VSET
MOD OUT
LTC6992-1
GND
V+
SET
DIV
6992 TA02
OUT
VCC
C1
0.1µF
R1
182k
DIVCODE = 2
(÷16, POL = 1)
R2
976k
*OPTIONAL RESISTOR ADJUSTS FOR DESIRED VIN RANGE.
IF
RM2
RM 1 +RM 2
= 0.9 THEN tON
=
ND
IV
•
1.125µs
•
RSET
50k
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.
24
For more information www.analog.com
Rev. D
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