LTC6992-4 Linear Technology, LTC6992-4 Datasheet - Page 21

• Manufacturer Part Number: LTC6992-4
• Description: TimerBlox Voltage-Controlled Pulse Width Modulator (PWM)
• Manufacturer: Linear Technology

APPLICATIONS INFORMATION
At the other extreme, it is not recommended to operate
the master oscillator beyond 2MHz because the accuracy
of the DIV pin ADC will suffer.
Pulse Width Modulation Bandwidth and Settling Time
The LTC6992 will respond to changes in V
bandwidth of TBD (see Figure 10). This makes it easy to
stabilize a feedback loop around the LTC6992, since it
does not introduce a low frequency pole.
Duty cycle settling time depends on the master oscillator
frequency. Following a ±100mV step change in V
duty cycle takes approximately TBD master clock cycles
Figure 10. PWM Frequency Response
Figure 11. PWM Settling Time
MOD
up to a –3dB
MOD
, the
(TBD • t
An example is shown in Figure 11.
Frequency Modulation and Settling Time
In addition to pulse-width modulation, the LTC6992 can
be frequency modulated by varying I
will respond to changes in I
of TBD • f
Following a 2x or 0.5x step change in I
frequency takes approximately TBD master clock cycles
(TBD • t
An example is shown in Figure 13.
MASTER
MASTER
Figure 12. Frequency Modulation Bandwidth
Figure 13. Frequency Change Settling Time
OUT
LTC6992-1/LTC6992-2/
LTC6992-3/LTC6992-4
(see Figure 12).
) to settle to within 1% of the final value.
) to settle to within 1% of the final value.
SET
up to a –3dB bandwidth
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SET
SET
. The LTC6992
, the output
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