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LTC6992-3

Analog Devices

Voltage-Controlled PWM

FEATURES n Pulse Width Modulation (PWM) Controlled by Simple 0V to 1V Analog Input n Four Available Options Define Duty ...


LTC6992-3

Analog Devices


Octopart Stock #: O-1516871

Findchips Stock #: 1516871-F

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Description
FEATURES n Pulse Width Modulation (PWM) Controlled by Simple 0V to 1V Analog Input n Four Available Options Define Duty Cycle Limits n Minimum Duty Cycle at 0% or 5% n Maximum Duty Cycle at 95% or 100% n Frequency Range: 3.81Hz to 1MHz n Configured with 1 to 3 Resistors n <1.7% Maximum Frequency Error n PWM Duty Cycle Error < 3.7% Maximum n Frequen
More View cy Modulation (VCO) Capability n 2.25V to 5.5V Single Supply Operation n 115μA Supply Current at 100kHz n 500μs Start-Up Time n CMOS Output Driver Sources/Sinks 20mA n –55°C to 125°C Operating Temperature Range n Available in Low Profile (1mm) SOT-23 (ThinSOT™) and 2mm × 3mm DFN n AEC-Q100 Qualified for Automotive Applications APPLICATIONS n PWM Servo Loops n Heater Control n LED Dimming Control n High Vibration, High Acceleration Environments n Portable and Battery-Powered Equipment All registered trademarks and trademarks are the property of their respective owners. LTC6992-1/LTC6992-2/ LTC6992-3/LTC6992-4 TimerBlox: Voltage-Controlled Pulse Width Modulator (PWM) DESCRIPTION The LTC®6992 is a silicon oscillator with an easy-to-use analog voltage-controlled pulse width modulation (PWM) capability. The LTC6992 is part of the TimerBlox® family of versatile silicon timing devices. A single resistor, RSET, programs the LTC6992’s internal master oscillator frequency. The output frequency is determined by this master oscillator and an internal frequency divider, NDIV, programmable to eight settings from 1 to 16384. fOUT = 1MHz NDIV • 50kΩ RSET , NDIV = 1,4,16 …16384 Applying a voltage between 0V and 1V on the MOD pin sets the duty cycle. The four versions differ in their minimum/maximum duty cycle. Note that a minimum duty cycle limit of 0% or maximum duty cycle limit of 100% allows oscillations to stop at the extreme duty cycle settings. DEVICE NAME LTC6992-1 LTC6992-2 LTC6992-3 LTC6992-4 PWM DUTY CYCLE RANGE 0% to 100% 5% to 95% 0% to 95% 5% to 100% For easy configuration of the LTC6992, use the TimerBlox LTC6992: PWM Web-Based Design Tool. TYPICAL APPLICATION 1MHz Pulse Width Modulator ANALOG PWM DUTY CYCLE CONTROL (0V TO 1V) MOD OUT LTC6992 GND V+ SET RSET 50k DIV 6992 TA01a 3.3V C1 0.1µF MOD 0.5V/DIV OUT 1V/DIV Document Feedback For more information www.analog.com 2µs/DIV 6992 TA01b Rev. D 1 LTC6992-1/LTC6992-2/ LTC6992-3/LTC6992-4 ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltage (V+) to GND…………………….6V Maximum Voltage On Any Pin (GND – 0.3V) ≤ VPIN ≤ (V+ + 0.3V) Operating Temperature Range (Note 2) LTC6992C–40°C to 85°C LTC6992I.–40°C to 85°C LTC6992H... –40°C to 125°C LTC6992MP –55°C to 125°C Specified Temperatu






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