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Rugged USB Isolation That Simply Works

Jeff Marvin - Burlington Design Center Manager Dec 12th 2014
The USB Port has become ubiquitous in computing and instrumentation equipment. However, it was not designed to operate in the harsh industrial or sensitive medical environments where USB is now being used. These environments demand galvanic isolation, high noise immunity and rugged transient and ESD protection. Linear Technology’s ...

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Simple, Compact & Efficient Isolated Power with Low IQ No-Opto Flyback ICs

Min Chen - Senior Design Engineer, Power Products Dec 12th 2014
The flyback converter is typically the first choice for engineers looking for isolated power supplies below 50W. These isolated power supplies generally require opto-isolators or extra transformer windings to regulate the output voltage. As a result, these isolated power supply solutions are generally complicated, bulky and ...

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Reduce EMI with 42V, 5A Synchronous Step-Down Silent Switcher

Daniel Cheng - Design Engineer, Power Products Dec 12th 2014
The LT8640 is a 42V, 5A synchronous step-down regulator that features Silent Switcher architecture. Silent Switcher minimizes EMI emissions without metal shielding or slow switching edges. This results in good EMI performance with high efficiency at high switching frequencies. Peak efficiency for a 12VIN to 5VOUT application ...

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LTC3882 Dual, 38V PolyPhase Step-Down Voltage Mode Controller with Digital PSM - Video Product Brief

Bruce Haug - Senior Product Marketing Engineer, Power Products Group Dec 3rd 2014
  The LTC®3882 is a dual, PolyPhase DC/DC synchronous step-down switching regulator controller with PMBus compliant serial interface. It uses a constant frequency, leading-edge modulation, voltage mode architecture for excellent transient response and output regulation. Each PWM channel can produce output voltages ...

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LTC2983 TechClips - Universal Temperature Measurement System

Mike Mayes - Design Section Head, Mixed Signal Products Nov 19th 2014
RTD TechClip The LTC2983 is a highly accurate, simple to use, universal temperature measurement system. It directly interfaces to RTDs, applies the excitation current, simultaneously measures the RTD and sense resistor, and reports the results in degrees C or F. It does not require any external references, buffers, or level ...

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A Very Low Power, High Performance I/Q Modulator

James Wong - Product Marketing Manager, High Frequency Products Nov 19th 2014
Modern digital transmitters take advantage of using high-order modulation to maximize data throughput rate while minimizing spectral bandwidth, thus allowing more efficient use of the frequency spectrum. I/Q modulators allow baseband signals to directly modulate onto the RF carrier. Such modulators typically suffer from excessive ...

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Low Power Precision Op Amp Allows Fast, Accurate Multiplexing

Kris Lokere - Applications Manager, Signal Chain Products Nov 19th 2014
If you need to measure many analog voltages, but not necessarily all at the same time, then a common approach is to multiplex these signals together into one output signal, so that you can then process and digitize each of these original voltage levels one at a time using shared circuitry. But doing this right requires some ...

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High Efficiency Buck-Boost Battery Charger

Charlie Zhao - Applications Section Leader, Power Products Nov 19th 2014
Today’s battery chargers are expected to support a variety of battery chemistries and accept a range of input voltages. In many applications, the input voltage range can vary from below the output battery voltage to above the battery voltage, requiring both step-down and step-up capability. In this video, we will show ...

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LTC3255 48VIN Fault-Protected 50mA Regulated Output Step-Down Charge Pump - Video Product Brief

Steve Knoth - Senior Product Marketing Engineer, Power Products Group Nov 18th 2014
  The LTC®3255 is a switched-capacitor step-down DC/DC converter that produces a regulated output (2.4V to 12.5V adjustable) from a 4V to 48V input. In applications where the input voltage exceeds twice the output voltage, 2:1 capacitive charge pumping extends output current capability beyond input supply current ...

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LT3999 36V, 1A 1MHz Push-Pull DC/DC Driver with Duty Cycle Control - Video Product Brief

Bruce Haug - Senior Product Marketing Engineer, Power Products Group Nov 18th 2014
  The LT®3999 is a monolithic, high voltage, high frequency DC/DC transformer driver providing isolated power in a small solution footprint. The LT3999 has two 1A current limited power switches that switch out of phase. The duty cycle is programmable to adjust the output voltage. The switching frequency is programmed ...

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LTC3807 38V Micropower Synchronous Buck Controller with VOUT to 24V - Video Product Brief

Bruce Haug - Senior Product Marketing Engineer, Power Products Group Nov 18th 2014
  The LTC®3807 is a high performance step-down switching regulator DC/DC controller that drives an all N-channel synchronous power MOSFET stage. A constant frequency current mode architecture allows a phase-lockable frequency of up to 750kHz. The 50μA no-load quiescent current extends operating run time in ...

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A Guide to Ordering Custom Programmed Digital Power System Management Devices

Bruce Haug - Sr. Product Marketing Engineer Oct 30th 2014
Digital power system management is being adopted in the marketplace because of its ability to provide accurate information about the power system and to autonomously control and supervise dozens of voltage rails with ease. Having digital control over analog power supplies with a simple PC connection is valuable during the ...

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More Power, Better Heat Dissipation, Smaller PCB Area

Yan Liang - Senior Applications Engineer, Power Products Oct 28th 2014
System engineers strive to increase performance with each successive product generation to maintain competitiveness. A major hurdle in that effort for densely populated boards such as ATCA, µTCA and mezzanine cards is finding PCB area to mount the additional ICs and components (memory, processors, data ports) necessary ...

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High Power Three-Channel LED Driver

Keith Szolusha - Senior Applications Engineer, Power Products Oct 27th 2014
Large arrays of LEDs require high power and multi-string LED drivers. When many single channel, high power converters are used in an application, a better solution may be to reduce the cost and number of components by using a single converter with several drivers on the same IC. Eliminating or reducing duplication of features ...

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LTC3245 2.7V to 38VIN, 250mA Buck-Boost Charge Pump - Video Product Brief

Steve Knoth - Senior Product Marketing Engineer, Power Products Group Oct 15th 2014
  The LTC3245 is a switched capacitor buck-boost DC/DC converter that produces a regulated output (3.3V, 5V or adjustable) from a 2.7V to 38V input. The device uses switched capacitor fractional conversion to maintain regulation over a wide range of input voltage. Internal circuitry automatically selects the conversion ...

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LTC4020 55V Buck-Boost Multi-Chemistry Battery Charger - Video Product Brief

Steve Knoth - Senior Product Marketing Engineer, Power Products Group Oct 15th 2014
The LTC®4020 is a high voltage power manager providing PowerPath™ instant-on operation and high efficiency battery charging over a wide voltage range. An onboard buck-boost DC/DC controller operates with battery and/or system voltages above, below, or equal to the input voltage. The LTC4020 seamlessly manages power ...

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LTspice: SOAtherm Tutorial

Dan Eddleman - Senior Applications Engineer Oct 8th 2014
Verifying that a Hot Swap design does not exceed the capabilities of a MOSFET is a challenge at high power levels. Fortunately, thermal behavior and SOA may be modeled in circuit simulators such as LTspice IV® . The SOAtherm-NMOS symbol included in LTspice contains a collection of MOSFET thermal models developed by Linear ...

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LTC3769 60VIN/60VOUT Low IQ Synchronous Boost Controller - Video Product Brief

Bruce Haug - Senior Product Marketing Engineer, Power Products Group Sep 11th 2014
  LTC®3769 is a high performance single output synchronous boost converter controller that drives an all N-channel power MOSFET stage. Synchronous rectification increases efficiency, reduces power losses and eases thermal requirements, simplifying high power boost applications. The 28μA no-load quiescent current ...

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LT4321 PoE Ideal Diode Bridge Controller - Video Product Brief

Alison Steer - Product Marketing Manager, Mixed Signal Products Sep 11th 2014
  The LT®4321 is a dual ideal diode bridge controller that enables a Power over Ethernet (PoE) powered device (PD) to receive power in either voltage polarity from RJ-45 data pairs, spare pairs, or both. The LT4321 and eight N-channel MOSFETs replace the eight diodes in a passive PoE rectifier bridge. The LT4321 ...

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LT4320 Ideal Diode Bridge Controller - Video Product Brief

Alison Steer - Product Marketing Manager, Mixed Signal Products Sep 11th 2014
  The LT®4320/LT4320-1 are ideal diode bridge controllers that drive four N-channel MOSFETs, supporting voltage rectification from DC to 600Hz typical. By maximizing available voltage and reducing power dissipation (see thermograph comparison below), the ideal diode bridge simplifies power supply design and reduces ...

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LT8471 Dual Multitopology Converter with 2A Switches - Video Product Brief

Jeff Gruetter - Senior Product Marketing Engineer, Power Products Group Aug 29th 2014
  The LT®8471 is a dual PWM DC/DC converter containing two internal 2A, 50V switches and an additional 500mA switch to facilitate step-down and inverting conversion. Each 2A channel can be independently configured as a buck, boost, SEPIC, flyback or inverting converter. Capable of generating positive and negative ...

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High Speed DAC for Wide Bandwidth Signal Generation

Clarence Mayott - Applications Engineer, Mixed Signal Products Aug 25th 2014
The LTC2000 is the latest high speed DAC from Linear Technology. Its low noise and excellent spectral purity make it ideal for demanding signal-generation applications. The LTC2000 is a high performance DAC that can produce signals up to 1GHz with extremely low noise and very high spectral purity. It can be operated in single ...

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Interview with Linear Technology Co-Founders Bob Swanson and Bob Dobkin

Aug 8th 2014
This video interview with Linear Technology Co-Founders Executive Chairman Bob Swanson and Chief Technical Officer Bob Dobkin is part of the Computer History Museum’s oral history project and is posted on their website. The interview, covering the early years, history, culture and technical focus of the company, was ...

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140V CMOS Op Amp with Rail-to-Rail Output & pA Inputs

Arnold Nordeng - Senior Design Engineer Jun 26th 2014
The LTC6090 high voltage CMOS op amp is the highest voltage monolithic op amp in the industry. It has a number of unique characteristics not found in other CMOS op amps. Unlike other CMOS amplifiers whose fine transistor geometries limit power supply operation to 5V, the LTC6090 is built on Linear Technology’s proprietary ...

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Active Clamp Synchronous Forward Controllers

Wei Gu - Applications Engineering Section Leader, Power Products Jun 18th 2014
The LT3752, LT3752‑1 and LT3753 are active clamp forward controllers that minimize external component count, solution size and cost. Two of these controllers, the LT3752 and LT3753, are designed for inputs up to 100V. The LT3752-1 is designed for applications with input voltages greater than 100V, suitable for HV car ...

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16-Channel, 16/12-Bit Voltage Output DACs in a Tiny 6mm x 6mm Package

Mark Thoren - Staff Scientist, Mixed Signal Products Jun 6th 2014
General-purpose DACs address a wide range of applications including instrumentation, industrial control, and setting voltages and currents in all manner of analog circuits. In this video, we demonstrate the 16-/12-bit LTC2668, a 16-channel, voltage output DAC with five software-programmable (SoftSpan™) or pin-configurable ...

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LTM2884/LTP2884 Isolated USB Transceivers with Isolated Power - Video Product Brief

Chris Gobok - Product Marketing Engineer, Mixed Signal Products Jun 5th 2014
  The LTM®2884 is a complete galvanically isolated USB 2.0 compatible μModule® (micromodule) transceiver. An upstream supply powers both sides of the interface through an integrated, isolated DC/DC converter. The LTM2884 is ideal for isolation in host, hub, bus splitter or peripheral device applications. ...

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LTC3875 Dual, 2-Phase, Synchronous Step-Down Controller with Sub-mΩ DCR Sensing & Temperature Compensation - Video Product Brief

Bruce Haug - Senior Product Marketing Engineer, Power Products Group May 29th 2014
  The LTC®3875 is a dual output current mode synchronous step-down DC/DC controller that drives all N-channel synchronous power MOSFET stages. It employs a unique architecture which enhances the signal-to-noise ratio of the current sense signal, allowing the use of very low DC resistance power inductors to maximize ...

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LTC3874 PolyPhase Step-Down Synchronous Slave Controller with Sub-mΩ DCR Sensing - Video Product Brief

Bruce Haug - Senior Product Marketing Engineer, Power Products Group May 28th 2014
The LTC®3874 is a dual PolyPhase® current mode synchronous step-down slave controller. It enables high current, multi-phase applications when paired with a companion master controller by extending the phase count. Compatible master controllers include the LTC3866, LTC3875 and LTC3774. The LTC3874 employs a unique architecture ...

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LTC3870 PolyPhase Step-Down Slave Controller for LTC Digital Power System Management Master Controllers - Video Product Brief

Bruce Haug - Senior Product Marketing Engineer, Power Products Group May 28th 2014
  The LTC®3870 is a PolyPhase® step-down slave controller specially designed for multiphase operation with the LTC3880 and LTC3883 digital power system management DC/DC controllers. It provides a small and cost effective solution for supplying very large currents by cascading it with a LTC3880 or LTC3883 controller. ...

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LTC3784 4.5V to 60VIN 2-Phase (10A/Phase) Boost Controller - Video Product Brief

Bruce Haug - Senior Product Marketing Engineer, Power Products Group May 28th 2014
  The LTC®3784 is a high performance PolyPhase® single output synchronous boost converter controller that drives two N-channel power MOSFET stages out-of-phase. Multiphase operation reduces input and output capacitor requirements and allows the use of smaller inductors than the single-phase equivalent. Synchronous ...

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LTM8052 TechClips - Output Current Limit Protection

Walker Bai & Willie Chan May 9th 2014
The user adjustable current limit of the LTM8052 is a useful protection feature should the load become compromised due to cracked, worn or otherwise damaged wiring insulation. With a 24V input supply and current limit set at 4.8A, the thermal rise of the module stabilizes at 34°C above ambient with no forced airflow while ...

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LTM8050 TechClips - 58V, 2A Step-Down μModule Regulator

Dong Wang and Willie Chan Apr 30th 2014
Inverting (Negative) Outputs With a relatively wide input voltage and output voltage range, the LTM8050 is well suited for Inverting applications when a negative output voltage is desired. Watch the LTM8050 deliver a -12V output at 1.5A from a 24V Input with 83% efficiency and just a 54°C temperature rise over ambient. Highly ...

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LTM4644 TechClips - Efficiency and Thermal Performance

Sam Young and Willie Chan Apr 13th 2014
The LTM4644 is a quad 4A step-down µModule regulator configurable as a quad, triple, dual or single output power supply in a small 9 x 15 x 5.01mm BGA. The high number of output options available in one package caters to the needs of FPGAs, ASICs and image sensors. Configured as a quad output, observe how the LTM4644 ...

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LTM4624 TechClips - Efficiency, Thermal and Load Transient Performance

Sam Young and Willie Chan Apr 13th 2014
The LTM4624 is a 4A step-down µModule regulator in a tiny 6.25 x 6.25 x 5.01mm package. Requiring just two 1206 case size ceramic capacitors and a 0603 resistor for operation, the LTM4624 step-down solution requires less than one square centimeter on a single sided PCB. Watch the LTM4624 deliver greater than 80% efficiency ...

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LTspice: SAR ADC Driver Interface

Kris Lokere - Signal Chain Applications Apr 3rd 2014
  High-performance SAR ADCs can offer amazing dynamic range and linearity at faster and faster sample rates. But how do you design the amplifier and interface at the analog inputs? LTspice IV can help. This video shows how to use LTspice to simulate the analog input interface of high-performance SAR ADCs. We will look ...

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MOSFET Failure Protection for Single Output PolyPhase Converter

Mike Shriver - Applications Engineer, Power Products Mar 19th 2014
The low output voltage rails in many of today’s leading edge communication, networking, computer and industrial systems must be designed to meet the competing demands of higher load current, higher efficiency and diminishing amounts of board real estate. For cases where the load current is high, the most effective approach ...

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Configuring SmartMesh Networks for Different Applications

Bill Lindsay - Field Systems Architect, Wireless Sensor Network Products Mar 19th 2014
Wireless Sensor Networks in general have a wide array of performance requirements. Data throughput, latency and power budget are often different per device, per customer, per installation, and per application. SmartMesh IP™ networks serve up simple interfaces that allow the user to trade off different performance metrics ...

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How to Probe the Switch Node of a μModule Regulator

Willie Chan - Product Marketing Engineer, uModule Products Mar 4th 2014
A common step in verifying if a power management circuit functions properly is to probe the switch node. But how does one perform that task on a power µModule regulator since the switch node is often not accessible? Using the LTM4611 as an example, Alan Chern explains how starting at the 42 second mark in this video he ...

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LTM4620 TechClips - Dual 13A or Single 26A DC/DC μModule Regulator

Mar 4th 2014
LTM4620 Current Sharing Two LTM4620 µModule regulators sharing current during start up, steady state and shut down.   LTM4620 Efficiency With 20V input and 1.2V output, the efficiency is measured across a range of load current. At 100A load current, the efficiency is measured at 83%.     LTM4620 ...

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