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LTC6992-3 Datasheet(PDF) 5 Page - Analog Devices

Part # LTC6992-3
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

LTC6992-3 Datasheet(HTML) 5 Page - Analog Devices

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LTC6992-1/LTC6992-2/
LTC6992-3/LTC6992-4
5
Rev. D
For more information www.analog.com
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. Test conditions are V+ = 2.25V to 5.5V, VMOD = 0V to VSET,
DIVCODE = 0 to 15 (NDIV = 1 to 16,384), RSET = 50k to 800k, RLOAD = 5k, CLOAD = 5pF unless otherwise noted.
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Analog Inputs
VSET
Voltage at SET Pin
l
0.97
1.00
1.03
V
∆VSET/∆T
VSET Drift Over Temperature
l
±75
µV/°C
RSET
Frequency-Setting Resistor
l
50
800
kΩ
MOD Pin Input Capacitance
2.5
pF
MOD Pin Input Current
l
±10
nA
VMOD,HI
VMOD Voltage for Maximum
Duty Cycle
LTC6992-1/LTC6992-4, POL = 0, D = 100%
LTC6992-2/LTC6992-3, POL = 0, D = 95%
l
0.90•VSET
0.86•VSET
0.936•VSET
V
V
VMOD,LO
VMOD Voltage for Minimum
Duty Cycle
LTC6992-1/LTC6992-3, POL = 0, D = 0%
LTC6992-2/LTC6992-4, POL = 0, D = 5%
l
0.064•VSET 0.10•VSET
0.14•VSET
V
V
VDIV
DIV Pin Voltage
l
0
V+
V
∆VDIV/∆V+ DIV Pin Valid Code Range (Note 5)
Deviation from Ideal
VDIV/V+ = (DIVCODE + 0.5)/16
l
±1.5
%
DIV Pin Input Current
l
±10nA
Digital Output
IOUT(MAX)
Output Current
V+ = 2.7V to 5.5V
±20
mA
VOH
High Level Output Voltage (Note 7)
V+ = 5.5V
IOUT = –1mA
IOUT = –16mA
l
l
5.45
4.84
5.48
5.15
V
V
V+ = 3.3V
IOUT = –1mA
IOUT = –10mA
l
l
3.24
2.75
3.27
2.99
V
V
V+ = 2.25V
IOUT = –1mA
IOUT = -8mA
l
l
2.17
1.58
2.21
1.88
V
V
VOL
Low Level Output Voltage (Note 7)
V+ = 5.5V
IOUT = 1mA
IOUT = 16mA
l
l
0.02
0.26
0.04
0.54
V
V
V+ = 3.3V
IOUT = 1mA
IOUT = 10mA
l
l
0.03
0.22
0.05
0.46
V
V
V+ = 2.25V
IOUT = 1mA
IOUT = 8mA
l
l
0.03
0.26
0.07
0.54
V
V
tr
Output Rise Time (Note 8)
V+ = 5.5V, RLOAD = ∞
V+ = 3.3V, RLOAD = ∞
V+ = 2.25V, RLOAD = ∞
1.1
1.7
2.7
ns
ns
ns
tf
Output Fall Time (Note 8)
V+ = 5.5V, RLOAD = ∞
V+ = 3.3V, RLOAD = ∞
V+ = 2.25V, RLOAD = ∞
1.0
1.6
2.4
ns
ns
ns



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