LT (Linear Technology) Articles
Linear Technology Corporation designs, manufactures and markets a broad line of standard high performance integrated circuits. Applications for the Company's products include telecommunications, cellular telephones, networking products, notebook and desktop computers, video/multimedia, industrial instrumentation, automotive electronics, factory automation, process control, and military and space systems. The Company's principal product categories include amplifiers, battery management, data converters, high frequency, interface, voltage regulators and voltage references.
- Written by Super User
- Parent Category: Product News
- Category: LT (Linear Technology) Articles
- Published on Friday, 11 May 2012 04:51
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Linear Technology has introduced the low pressure system, high accuracy temperature sensor and dual-channel supply monitor LTC2995. LTC2995 measure the remote diode temperature accuracy of ± 1 ° C, and its own chip temperature measurement accuracy of ± 2 ° C, while suppressing the error caused by noise and series resistance. The device is ± 1.5% accuracy of monitoring two rails (one between 2.25V to 5.5V power supply to the device), which minimizes the system power margin. The LTC2995 provides a voltage proportional to absolute temperature (VPTAT) output as well as a separate temperature is too low, too high temperature, undervoltage and overvoltage alarm output (user-adjustable threshold definition). Configure the device without code. LTC2995 in a space-saving micro-power solution, both the temperature monitor and voltage monitor function.
The LTC2995's accuracy can be configured and no code to run to meet the needs of a variety of applications, including system heat control, energy collection, desktop and notebook computers, network servers, and environmental monitoring. The user can choose to measure the local temperature, remote temperature or alternating between the two measurements, both temperature output pin can be configured for the temperature is too low and / or high temperature alarms in any combination. Temperature conversion is updated once every 3.5 ms to give the system sufficient time to respond to the alert. 1.8V voltage reference output can also be used to share with an external ADC, or used to generate the temperature threshold voltage. When monitoring voltage, the input glitch filter to reduce noise caused by an error reset, and two power-sharing is an overvoltage and undervoltage pin. All threshold resistor divider regulator, all alarm reset output delay time can be only a single capacitor adjustment. Within the entire operating temperature range, the LTC2995 consumes only 220μA supply current.
LTC2995 to provide commercial, industrial and automotive temperature version supported by the operating temperature range 0 ° C to 70 ° C, -40 ° C to 85 ° C and -40 ° C to 125 ° C. LTC2995 RoHS compliant 20-pin 3mm x 3mm QFN package. 1000 approved the purchase price of $ 2.45 per tablet. For more information, Please login www.linear.com.cn/product/LTC2995.
Caption: OV / UV power supply and a single OT / UT remote temperature monitor
Summary of Features: LTC2995
· Monitor the temperature and the two voltage
· Voltage output proportional to the temperature
For temperature and voltage adjustable threshold
± 1 ° C Remote Temperature Accuracy
Within ± 2 ° C temperature accuracy
± 1.5% voltage threshold accuracy
· 3.5 ms VPTAT Updated
· 2.25V to 5.5V supply voltage
· Adjustable reset timeout
· 1.8V reference voltage output
Open-drain alarm output
· 20-pin 3mm x 3mm QFN package
- Written by Super User
- Parent Category: Product News
- Category: LT (Linear Technology) Articles
- Published on Tuesday, 24 April 2012 08:09
- Hits: 245
Linear Technology Introduces LT3796 100V, high side current sense DC / DC Controller, the device can be used to adjust the constant current or constant voltage, very suitable for driving high-brightness (HB) LED. 6V to 100V input voltage range supports a wide variety of applications, including automotive, industrial and architectural lighting. LT3796 using an external N-channel MOSFETs, available a nominal 12V input drive up to 85V white LED, and to provide more than 50W of power. The LT3796 is ideal for constant current and constant voltage charging to the battery or super capacitor. LT3796 high side current sense, can be used to boost, buck, buck - boost or SEPIC and flyback topology. In addition, the device provides the input and output current limiting and monitoring, in order to improve the reliability and design flexibility. The LT3796 can provide over 94% efficiency in boost mode, thereby minimizing external heat demand. A frequency adjust pin enables the user to be able to set the frequency range of 100kHz to 1MHz, optimizing efficiency while minimizing external component size and cost. The combination of thermally enhanced TSSOP-28 package, the LT3796 provides a highly compact high-brightness LED driver or charger solution.
LT3796 True Color PWM ™ (the true color PWM) dimming of up to 3000:1 dimming range provides constant LED color. Requires much less demanding dimming requirements, the CTRL pin can be used to provide a 10:1 analog dimming range. The device's fixed frequency, current mode architecture ensures stable operation in a wide power supply and output voltage range.
Sturdy open circuit and short circuit protection to maximize the overall system reliability, and C/10 detection to optimize the charging of batteries and supercapacitors design. Other features include frequency synchronization, programmable UVLO, and programmable fault restart the timer.
- Written by Super User
- Parent Category: Product News
- Category: LT (Linear Technology) Articles
- Published on Tuesday, 24 April 2012 07:55
- Hits: 179
(Linear Technology Corporation) introduced the the 60VIN buck switching regulator LT3988, the device can provide two-way 1A output. LT3988 in the VIN range of 4V to 60V, with overvoltage lockout protection, so as not to be up to 80V transient voltage damage, making it ideal for automotive applications load dump and cold crank conditions. The LT3988 can be used two separate input track or with a single input-driven to maximize design flexibility. Its internal 1.3A switch up to 1A of continuous output current. The switching frequency is user programmable, the range of 250kHz to 2.5MHz, so designers can maximize efficiency while avoiding critical noise-sensitive frequency bands. Its thermally enhanced MSOP-16E package and high switching frequency (to allow the use of small external inductors and capacitors) are combined to form a compact footprint and high thermal efficiency solutions.
LT3988 1.3A switch, using two high-efficiency and integrated in a single chip with the necessary boost diode, oscillator, control and logic circuitry. The clamping diode current sense (DA) pin even at high switching frequency can be in the input voltage transient protection circuit for the period, while increasing the ability to protect against short circuit. The inverting switch to minimize the input and output ripple. Special design techniques used in the LT3988 can achieve high efficiency in wide input voltage range, and the device's current mode topology enables fast transient response and excellent loop stability. Other features include external synchronization (from 250kHz to 2.5MHz), the internal loop compensation, thermal shutdown and tracking capabilities.
The LT3988EMSE the price of $ 3.65 per tablet. Industrial temperature grade versions LT3988IMSE tested and guaranteed to work in -40 ° C to 125 ° C operating junction temperature range, the price of $ 4.2 per tablet. The high temperature version LT3988HMSE also been tested, and guaranteed to work in -40 ° C to 150 ° C junction temperature range, a price of $ 4.45 per tablet. All prices are one thousand approved purchase price of each version are available from stock. For more information, Please login www.linear.com.cn/product/LT3988.
Summary of Features: LT3988
Wide Input Range: 4V to 60V overvoltage lockout protection circuit can safely withstand 80V transients
Two with the internal power switch 1A output switching regulator
Short circuit withstand capability
· 0.25MHz to 2.5MHz adjustable switching frequency can be synchronized over the entire frequency range
· An integrated boost diode
The integrated loop compensation
· Phase switching to reduce the ripple
Low Shutdown IQ (<2μA)
The use of small inductors and ceramic capacitors
· A thermally enhanced 16-pin MSOP package
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- Linear Technology has released the automotive and high-reliability military version of the LTM2881 and LTM2882 uModule transceiver
- Linear Technology has released a 36V input, 5A Step-Down uModule regulator LTM8026
- Linear Technology LTC4156 power management devices for battery backup system
- Linear Technology has released the current mode synchronous buck DC / DC Controller LTC3866
- Linear Technology offers flyback regulator for applications such as automotive and military
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