LTC6992-1/LTC6992-2/
LTC6992-3/LTC6992-4
4
69921234fc
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
Power Supply
V+
Operating Supply Voltage Range
l
2.25
5.5
V
Power-On Reset Voltage
l
1.95
V
IS
Supply Current
RL = ∞, RSET = 50k,
NDIV = 1
V+ = 5.5V
l
365
450
A
V+ = 2.25V
l
225
285
A
RL = ∞, RSET = 50k,
NDIV = 4
V+ = 5.5V
l
350
420
A
V+ = 2.25V
l
225
280
A
RL = ∞, RSET = 50k,
NDIV ≥ 16
V+ = 5.5V
l
325
390
A
V+ = 2.25V
l
215
265
A
RL = ∞, RSET = 800k,
NDIV = 1 to 16,384
V+ = 5.5V
l
120
170
A
V+ = 2.25V
l
105
150
A
Analog Inputs
VSET
Voltage at SET Pin
l
0.97
1.00
1.03
V
VSET/T
VSET Drift Over Temperature
l
±75
V/°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
0.90VSET
0.86VSET
0.936VSET
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
0.064VSET 0.10VSET
0.14VSET
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
5.45
4.84
5.48
5.15
V
V+ = 3.3V
IOUT = –1mA
IOUT = –10mA
l
3.24
2.75
3.27
2.99
V
V+ = 2.25V
IOUT = –1mA
IOUT = -8mA
l
2.17
1.58
2.21
1.88
V
VOL
Low Level Output Voltage (Note 7)
V+ = 5.5V
IOUT = 1mA
IOUT = 16mA
l
0.02
0.26
0.04
0.54
V
V+ = 3.3V
IOUT = 1mA
IOUT = 10mA
l
0.03
0.22
0.05
0.46
V
V+ = 2.25V
IOUT = 1mA
IOUT = 8mA
l
0.03
0.26
0.07
0.54
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
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