ltc6992-2-ltc6992-3 Linear Technology Corporation, ltc6992-2-ltc6992-3 Datasheet

ltc6992-2-ltc6992-3

Manufacturer Part Number

ltc6992-2-ltc6992-3

Description

Timerblox Voltage-controlled Pulse Width Modulator Pwm

Manufacturer

Linear Technology Corporation

Datasheet

1.LTC6992-2-LTC6992-3.pdf (34 pages)

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APPLICATIONS

L, LT, LTC and LTM, Linear Technology, TimerBlox and the Linear logo are registered

trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks

are the property of their respective owners.

FEATURES

TYPICAL APPLICATION

Pulse Width Modulation (PWM) Controlled by

Simple 0V to 1V Analog Input

Four Available Options Define Duty Cycle Limits

– Minimum Duty Cycle at 0% or 5%

– Maximum Duty Cycle at 95% or 100%

Frequency Range: 3.81Hz to 1MHz

Configured with 1 to 3 Resistors

<1.7% Maximum Frequency Error

PWM Duty Cycle Error < 3.7% Maximum

Frequency Modulation (VCO) Capability

2.25V to 5.5V Single Supply Operation

115μA Supply Current at 100kHz

500μs Start-Up Time

CMOS Output Driver Sources/Sinks 20mA

–40°C to 125°C Operating Temperature Range

Available in Low Profile (1mm) SOT-23 (ThinSOT™)

and 2mm × 3mm DFN

PWM Servo Loops

Heater Control

LED Dimming Control

High Vibration, High Acceleration Environments

Portable and Battery-Powered Equipment

ANALOG PWM

DUTY CYCLE

(0V TO 1V)

CONTROL

1MHz Pulse Width Modulator

50k

SET

MOD

GND

SET

LTC6992

6992 TA01a

OUT

DIV

3.3V

0.1μF

DESCRIPTION

The LTC

analog voltage-controlled pulse width modulation (PWM)

capability. The LTC6992 is part of the TimerBlox

of versatile silicon timing devices.

A single resistor, R

nal master oscillator frequency. The output frequency

is determined by this master oscillator and an internal

frequency divider, N

from 1 to 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.

For easy configuration of the LTC6992, download the

TimerBlox Designer tool at www.linear.com/timerblox.

Voltage-Controlled Pulse

OUT

0.5V/DIV

Width Modulator (PWM)

1V/DIV

MOD

OUT

DEVICE NAME

6992 is a silicon oscillator with an easy-to-use

LTC6992-1

LTC6992-2

LTC6992-3

LTC6992-4

1MHz

LTC6992-1/LTC6992-2/

LTC6992-3/LTC6992-4

DIV

•

50kΩ

SET

DIV

SET

, programmable to eight settings

, programs the LTC6992’s inter-

, N

2μs/DIV

DIV

= 1,4,16 …16384

PWM DUTY CYCLE RANGE

TimerBlox:

0% to 100%

5% to 100%

5% to 95%

0% to 95%

6992 TA01b

69921234fb

family

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