LTC6992CDCB-2#TRMPBF Linear Technology, LTC6992CDCB-2#TRMPBF Datasheet

IC TIMERBLOX VOLT PWM 6-DFN

LTC6992CDCB-2#TRMPBF

Manufacturer Part Number
LTC6992CDCB-2#TRMPBF
Description
IC TIMERBLOX VOLT PWM 6-DFN
Manufacturer
Linear Technology

Specifications of LTC6992CDCB-2#TRMPBF

Frequency
*
Voltage - Supply
*
Current - Supply
365µA
Operating Temperature
*
Package / Case
6-WFDFN Exposed Pad
Count
*
No. Of Timers
1
Clock External Input
No
Supply Voltage Range
2.25V To 5.5V
Digital Ic Case Style
DFN
No. Of Pins
6
Operating Temperature Range
0°C To +70°C
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LTC6992CDCB-2#TRMPBFTR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC6992CDCB-2#TRMPBFLTC6992CDCB-2
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC6992CDCB-2#TRMPBFLTC6992CDCB-2#PBF
Manufacturer:
LT
Quantity:
5 000
Company:
Part Number:
LTC6992CDCB-2#TRMPBFLTC6992CDCB-2#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
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
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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
R
50k
SET
MOD
GND
SET
LTC6992
6992 TA01a
OUT
DIV
V
+
3.3V
C1
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.
f
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/
N
LTC6992-3/LTC6992-4
DIV
50kΩ
R
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
1

Related parts for LTC6992CDCB-2#TRMPBF

LTC6992CDCB-2#TRMPBF Summary of contents

Page 1

... High Vibration, High Acceleration Environments n Portable and Battery-Powered Equipment 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. TYPICAL APPLICATION ...

Page 2

... ORDER INFORMATION Lead Free Finish TAPE AND REEL (MINI) TAPE AND REEL LTC6992CDCB-1#TRMPBF LTC6992CDCB-1#TRPBF LTC6992IDCB-1#TRMPBF LTC6992IDCB-1#TRPBF LTC6992HDCB-1#TRMPBF LTC6992HDCB-1#TRPBF LTC6992CS6-1#TRMPBF LTC6992CS6-1#TRPBF LTC6992IS6-1#TRMPBF LTC6992IS6-1#TRPBF LTC6992HS6-1#TRMPBF LTC6992HS6-1#TRPBF LTC6992CDCB-2#TRMPBF LTC6992CDCB-2#TRPBF LTC6992IDCB-2#TRMPBF LTC6992IDCB-2#TRPBF LTC6992HDCB-2#TRMPBF LTC6992HDCB-2#TRPBF LTC6992CS6-2#TRMPBF LTC6992CS6-2#TRPBF LTC6992IS6-2#TRMPBF LTC6992IS6-2#TRPBF LTC6992HS6-2#TRMPBF LTC6992HS6-2#TRPBF LTC6992CDCB-3#TRMPBF LTC6992CDCB-3#TRPBF LTC6992IDCB-3#TRMPBF LTC6992IDCB-3#TRPBF LTC6992HDCB-3#TRMPBF LTC6992HDCB-3#TRPBF ...

Page 3

ORDER INFORMATION Lead Free Finish TAPE AND REEL (MINI) TAPE AND REEL LTC6992HDCB-4#TRMPBF LTC6992HDCB-4#TRPBF LTC6992CS6-4#TRMPBF LTC6992CS6-4#TRPBF LTC6992IS6-4#TRMPBF LTC6992IS6-4#TRPBF LTC6992HS6-4#TRMPBF LTC6992HS6-4#TRPBF TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container. Consult LTC Marketing for parts ...

Page 4

LTC6992-1/LTC6992-2/ LTC6992-3/LTC6992-4 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T DIVCODE = 16,384), R DIV SYMBOL PARAMETER I Supply Current S Analog Inputs V Voltage at SET Pin SET ΔV /ΔT V ...

Page 5

ELECTRICAL CHARACTERISTICS Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC6992C is ...

Page 6

LTC6992-1/LTC6992-2/ LTC6992-3/LTC6992-4 TYPICAL PERFORMANCE CHARACTERISTICS otherwise noted. Frequency Error vs R SET 3 GUARANTEED MAX OVER TEMPERATURE 2 3 PARTS 1 0 –1 –2 GUARANTEED MIN OVER TEMPERATURE –3 50 200 400 800 100 R (k) SET 6992 G04 V ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS otherwise noted. N > 1 Duty Cycle Error vs R DIV SET 0.2 (12.5%) MOD SET 4 DIVCODE = 4 3 PARTS –1 –2 –3 –4 –5 50 100 ...

Page 8

LTC6992-1/LTC6992-2/ LTC6992-3/LTC6992-4 TYPICAL PERFORMANCE CHARACTERISTICS otherwise noted. N > 1 Duty Cycle Error DIV vs Temperature 5 4 GUARANTEED MAX 0.5 (50%) MOD SET 3 DIVCODE = 4 3 PARTS –1 –2 –3 –4 ...

Page 9

TYPICAL PERFORMANCE CHARACTERISTICS otherwise noted. N > 1 Duty Cycle DIV MOD SET 100 LTC6992-1/LTC6992 LTC6992-2/ 70 LTC6992 LTC6992-2/ 30 LTC6992-3 20 DIVCODE = 11 LTC6992- PARTS LTC6992-4 0 ...

Page 10

LTC6992-1/LTC6992-2/ LTC6992-3/LTC6992-4 TYPICAL PERFORMANCE CHARACTERISTICS otherwise noted. Linearity Near 31% Duty Cycle 36 DIVCODE = PARTS 0.308 0.324 0.34 0.356 0.372 0.388 V /V (V/V) MOD SET 6992 ...

Page 11

TYPICAL PERFORMANCE CHARACTERISTICS otherwise noted. Typical Frequency Error vs Time (Long-Term Drift) 200 65 UNITS SOT-23 AND DFN PARTS 150 T = 30°C A 100 50 0 –50 –100 –150 –200 0 400 800 1200 1600 2000 2400 2800 TIME ...

Page 12

LTC6992-1/LTC6992-2/ LTC6992-3/LTC6992-4 PIN FUNCTIONS (DCB/S6 (Pin 1/Pin 5): Supply Voltage (2.25V to 5.5V). This sup- ply should be kept free from noise and ripple. It should be bypassed directly to the GND pin with a 0.1μF capacitor. DIV ...

Page 13

BLOCK DIAGRAM (S6 Package Pin Numbers Shown DIV 4-BIT A/D DIGITAL 4 CONVERTER FILTER R2 MASTER OSCILLATOR f OSC HALT OSCILLATOR IF I < 500nA SET V 3 SET I SET R SET I SET MCLK ...

Page 14

LTC6992-1/LTC6992-2/ LTC6992-3/LTC6992-4 OPERATION The LTC6992 is built around a master oscillator with a 1MHz maximum frequency. The oscillator is controlled by the SET pin current (I ) and voltage (V SET 1MHz • 50k conversion factor that is accurate to ...

Page 15

OPERATION Table 1. DIVCODE Programming DIVCODE POL N DIV 256 5 0 1024 6 0 4096 7 0 16384 8 1 16384 9 1 4096 10 ...

Page 16

LTC6992-1/LTC6992-2/ LTC6992-3/LTC6992-4 OPERATION Pulse Width (Duty Cycle) Modulation The MOD pin is a high impedance analog input providing direct control of the output duty cycle. The duty cycle is proportional to the voltage applied to the MOD pin ...

Page 17

OPERATION POL = 1 forces a simple logic inversion changes the duty cycle range of the LTC6992-3 (making it 100% to 5%) and LTC6992-4 (making it 95% to 0%). These transfer functions are detailed in Figure 4. 100 ...

Page 18

LTC6992-1/LTC6992-2/ LTC6992-3/LTC6992-4 OPERATION Changing DIVCODE After Start-Up Following start-up, the A/D converter will continue monitoring V for changes. Changes to DIVCODE will DIV be recognized slowly, as the LTC6992 places a priority on eliminating any “wandering” in the DIVCODE. The ...

Page 19

... DIV the value for the R resistor. SET Alternatively, Linear Technology offers the easy to use TimerBlox Designer tool to quickly design any LTC6992 based circuit. Download the free TimerBlox Designer software at www.linear.com/timerblox. Step 1: Selecting the POL Bit Setting Most applications will use POL = 0, resulting in a positive transfer function ...

Page 20

LTC6992-1/LTC6992-2/ LTC6992-3/LTC6992-4 APPLICATIONS INFORMATION ing a large R resistor. POL = 0 and N SET DIVCODE = 1. Using Table 1, choose the R1 and R2 values to program DIVCODE = 1. Step 4: Select R SET Calculate the correct ...

Page 21

APPLICATIONS INFORMATION I Extremes (Master Oscillator Frequency Extremes) SET When operating with I outside of the recommended SET 1.25μA to 20μA range, the master oscillator operates outside of the 62.5kHz to 1MHz range in which it is most accurate. The ...

Page 22

LTC6992-1/LTC6992-2/ LTC6992-3/LTC6992-4 APPLICATIONS INFORMATION Power Supply Current The power supply current varies with frequency, supply voltage and output loading. It can be estimated under any condition using the following equation (DIVCODE = 0 or 15): DIV ...

Page 23

APPLICATIONS INFORMATION + DIV R2 SET R SET TYPICAL APPLICATIONS MOD OUT LTC6992 + GND V SET DIV R SET OUT GND MOD R DFN PACKAGE Figure 14. Supply Bypassing ...

Page 24

LTC6992-1/LTC6992-2/ LTC6992-3/LTC6992-4 TYPICAL APPLICATIONS Digitally Controlled Duty Cycle with Internal V V OUT ANALOG PWM DUTY CYCLE CONTROL MOD (0V TO 1V) LTC6992-X GND SET R SET 24 Reference Variation Eliminated REF MOD OUT LTC6992 0.1μF GND + ...

Page 25

TYPICAL APPLICATIONS ANALOG PWM DUTY CYCLE CONTROL MOD (0V TO 1V) LTC6992-X GND + V f MAX R VCO SET f MIN R SET ‘HC04 NOTES WHILE THIS CIRCUIT IS SIMPLER THAN THE CIRCUIT TO THE RIGHT, ITS FREQUENCY ACCURACY ...

Page 26

LTC6992-1/LTC6992-2/ LTC6992-3/LTC6992-4 TYPICAL APPLICATIONS Motor Speed/Direction Control for Full H-Bridge (Locked Anti-Phase Drive) INPUT MOD LTC6992-2 GND SET R3 300k Motor Speed/Direction Control for Full H-Bridge (Sign/Magnitude Drive) INPUT MOD LTC6992-2 GND SET R3 ...

Page 27

TYPICAL APPLICATIONS Ratiometric Sensor to Pulse Width, Non-Inverting Response V = 2. 10k R SENSOR K • 2. 100k ...

Page 28

LTC6992-1/LTC6992-2/ LTC6992-3/LTC6992-4 TYPICAL APPLICATIONS V = 2. 130k R6 8.66k 2ms SERVO CONTROL POT 10k 1ms Direct Voltage Controlled PWM Dimming (0 to 15000 Cd/m V DIMMING 28 Radio Control Servo Pulse Generator R6 9.09k R6 ...

Page 29

TYPICAL APPLICATIONS Wide Range LED Dimming (0 to 85000 Cd/m R2 7.5k 5V 0.1μ – 10k – + LT6004 + LT6004 R4 R3 7.5k 10k V REF V DIMMING 0V TO 1.65V V FAST FAST PWM CONTROLS 6000 ...

Page 30

LTC6992-1/LTC6992-2/ LTC6992-3/LTC6992-4 TYPICAL APPLICATIONS + V 0.1μF R14 10k R2 LT1011 – 100k 1kHz MOD + SOURCE C1 LTC6992-2 PWM R15 1μF 10k GND R1 10k SET + 0.1μF V R10 100kHz 499k INTERMEDIATE PWM – + LT1636 CONCEPT DESIGN ...

Page 31

PACKAGE DESCRIPTION 1.65 ±0.05 3.55 ±0.05 (2 SIDES) 2.15 ±0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS PIN 1 BAR TOP MARK (SEE NOTE 6) 0.200 REF DCB Package 6-Lead Plastic DFN (2mm × 3mm) (Reference LTC DWG # 05-08-1715 Rev ...

Page 32

LTC6992-1/LTC6992-2/ LTC6992-3/LTC6992-4 PACKAGE DESCRIPTION 0.62 0.95 MAX REF 3.85 MAX 2.62 REF RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.20 BSC DATUM ‘A’ 0.30 – 0.50 REF NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ...

Page 33

... Typical Applications drawing 6692 TA13 OUT Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. in the Electrical Characteristics table. ...

Page 34

... Resistor Set Pulse Width from 1μs to 34sec, No Caps, 3% Accurate Resistor Set Delay from 1μs to 34sec, No Caps Required, 3% Accurate ● www.linear.com 0.22μF 3.92M 124k 300mA ISP R SENSE 330mΩ C2 4.7μF ISN TG GND 6992 TA15 = 35μA at 400kHz 69921234fb LT 0711 REV B • PRINTED IN USA © LINEAR TECHNOLOGY CORPORA TION 2010 ...

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