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LTC6992IS6-1#TRPBF

TimerBlox Voltage-Controlled PWM Oscillator, 3.81Hz-1MHz, 0-100% duty, TSOT-23-6

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Manufacturer Part：

LTC6992IS6-1#TRPBF

Package：

TSOT-23-6 (2.9 x 1.6 x 1.0 mm)

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Description

Product Overview

The LTC6992IS6-1#TRPBF from Analog Devices is a TimerBlox voltage-controlled pulse width modulator (PWM) silicon oscillator. It generates a PWM output with duty cycle controlled by a 0 V to 1 V analog input voltage, and frequency set by a single resistor, from 3.81 Hz to 1 MHz in a TSOT-23-6 package.

Key Specifications

Type Voltage-Controlled PWM Oscillator (TimerBlox)
Frequency Range 3.81 Hz to 1 MHz
PWM Duty Cycle Range 0% to 100% (Version -1)
Duty Cycle Control 0 V to 1 V analog input on MOD pin
Frequency Accuracy <1.7% max error
Duty Cycle Accuracy <3.7% max error
Supply Voltage 2.25 V to 5.5 V
Supply Current 115 µA at 100 kHz
Output Current 20 mA source/sink (CMOS)
Start-Up Time 500 µs
Package TSOT-23-6 (1 mm height)
Operating Temperature -40°C to 85°C

Features

  • Simple 0 V to 1 V analog PWM duty cycle control
  • Frequency set by single resistor (RSET)
  • 8 programmable divider settings (NDIV = 1 to 16384)
  • Four versions for different duty cycle ranges
  • Less than 1.7% maximum frequency error
  • Frequency modulation (VCO) capability
  • 500 µs fast start-up time
  • AEC-Q100 qualified versions available

Applications

  • PWM servo loops and motor speed control
  • LED dimming and brightness control
  • Heater and temperature control
  • DC-DC converter test stimulus
  • Portable and battery-powered PWM generation

The LTC6992IS6-1#TRPBF from Analog Devices is a silicon oscillator with voltage-controlled pulse width modulation (PWM) capability, part of the TimerBlox family. A single resistor (RSET) programs the internal master oscillator frequency, and an internal programmable divider (NDIV from 1 to 16384) sets the output frequency from 3.81 Hz to 1 MHz. The duty cycle is controlled by applying a 0 V to 1 V voltage on the MOD pin, where 0 V corresponds to 0% duty and 1 V corresponds to 100% duty (LTC6992-1 version). The output is a CMOS-level signal capable of sourcing and sinking 20 mA. The device consumes only 115 µA at 100 kHz and starts up in 500 µs.

The LTC6992IS6-1#TRPBF operates using a master oscillator followed by a programmable frequency divider. The master oscillator frequency is set by an external resistor RSET connected to the SET pin according to fMASTER = 1 MHz x (50 kOhm / RSET). The DIV pin voltage, set by a resistor divider from SET, selects one of eight divider values (NDIV = 1, 4, 16, 64, 256, 1024, 4096, 16384). The output frequency is fOUT = fMASTER / NDIV. The MOD pin accepts an analog voltage (0 V to 1 V) that sets the PWM duty cycle through an internal comparator and control logic. The LTC6992-1 version provides 0% to 100% duty cycle range, allowing the output to stop at extreme settings. The CMOS output stage drives rail-to-rail with 20 mA source/sink capability. An internal voltage regulator provides supply-independent timing accuracy.

Pin Name Type Function
1 SET I/O Frequency set resistor (RSET)
2 GND Ground Ground
3 V+ Power Power supply (2.25-5.5V)
4 OUT Output PWM output (CMOS, 20mA)
5 DIV Input Frequency divider select
6 MOD Input PWM duty cycle control (0-1V)
  • LED dimming with analog control voltage input
  • PWM servo motor speed control loops
  • Heater power control in industrial systems
  • DC-DC converter evaluation test stimulus
  • Battery-powered PWM generation for portable devices
Manufacturer Part Number Package Notes
Analog Devices LTC6992IS6-2#TRPBF TSOT-23-6 5-95% duty cycle range
Analog Devices LTC6993IS6-1#TRPBF TSOT-23-6 One-shot timer, TimerBlox
Analog Devices LTC6991IS6#TRPBF TSOT-23-6 Low-frequency oscillator, TimerBlox
Texas Instruments NE555DR SOIC-8 Classic timer, not voltage-controlled PWM
Microchip MCP1630-E/SN SOIC-8 PWM controller for switch-mode power
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