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Solutions Search - Micropower Buck Regulators

Dual Channel 42V, 4A Monolithic Synchronous Step-Down Silent Switcher 2 with 6.2μA Quiescent Current

Walker Bai - Applications Enginneer Nov 14th 2017
Design Note DN10477: Introduction The LT®8650S 42V, dual channel, 4A, synchronous Silent Switcher®2 regulator features a wide input voltage range of 3V to 42V, ideal for automotive, industrial and other stepdown applications. Its quiescent current is only 6.2μA, with the outputs in regulation, a critical feature ...

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High Efficiency Solar MPPT Battery Charger Using LT8611 and AD5245

Perry Faubert - FAE Jul 10th 2017
Introduction Outdoor applications that use solar panels in the range of a few watts often use a microcontroller-based MPPT (Maximum Power Point Tracking)  function to extract the maximum power available over the full range of environmental operating conditions. Many microcontroller-based MPPT solutions designed for ...

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Low EMI Power Solutions and Electromagnetic Compatibility (EMC) Standards

Kevin B. Scott - Senior Strategic Marketing Engineer May 30th 2017
Low EMI Solutions and ElectromagneticCompatibility (EMC) Standards Many Linear Technology Power Products are compliant to a specific electromagnetic compatibility standard. The most commonly referenced standards are EN 55022, CISPR 22 Class B, FCC Part 15 Class B, and CISPR 25. When testing a power solution, there ...

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60V Low IQ, Dual Output Synchronous Step-Down Controller with Adjustable Gate Drive

Victor Khasiev - Applications Engineer Mar 31st 2017
Design Note 562: Introduction The LTC®3892 is a dual output synchronous buck controller featuring a wide input voltage range of 4.5V to 60V and an output voltage of 0.8V to 99% of VIN. The combination of the LTC3892’s built-in FET drivers and external FETs yield high efficiency and high power capability, up to 97% ...

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Low Noise Power Supplies Come in Many Flavors: Part 3 - Buck Converters

Kevin B. Scott - Senior Strategic Marketing Engineer
Tim Sourdif - Senior Design Engineer
Mar 23rd 2017
In Part 1 of the series, we looked at linear regulators for lowest output noise performance. In Part 2, charge pump solutions with integrated post linear regulators we highlighted. In these previous examples, circuit efficiency was a lower priority. But what if low output voltage noise and high efficiency are both desired? ...

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Hybrid Wide Dimming Ratio Linear LED Current Controller Using LT8614 & LT3083/LT6015

Tom Mosteller - Field Applications Engineer Oct 17th 2016
Many applications for LED illumination require wide dimming ratios. This can be accomplished simply via an adjustable current source as show below.  The current source can be varied by a number of different means, and a large LED current range can be achieved. The primary problem with this technique is that the power dissipation ...

Blog Post Circuit LTspice 

 

95% Efficient at 2MHz 42V Sync Buck

Jun 24th 2016
Linear Technology’s family of high voltage synchronous step-down DC/DC switching regulators offer up to 95% efficiency. Switching at 2MHz, these low EMI parts utilize the Silent Switcher technology. Other features include spread spectrum frequency modulation, ultra-low quiescent current and are available with single, dual, ...

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42V High Power Density Buck Regulators in a Tiny QFN Package

Ying Cheng - Sr Apps Eng Dec 7th 2015
Design Note 1038: Introduction Power dissipation is a significant problem facing the designers of DC/DC converters in industrial and automotive applications, where high currents are required, but space is limited. It is possible to produce a highly efficient regulator from high performance discrete components, but expense and ...

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Spread Spectrum Frequency Modulation Reduces EMI

Kevin B. Scott - Senior Strategic Marketing Engineer
Greg Zimmer - Senior Product Marketing Engineer
Nov 4th 2015
Electromagnetic Radiation (EMR), Electromagnetic Interference (EMI) and Electromagnetic Compliance (EMC) are terms that pertain to energy from electrically charged particles and the associated magnetic fields that can potentially interfere with circuit performance and signal transmissions. With the proliferation of wireless ...

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42V Quad Monolithic Synchronous Step-Down Regulator with 30μA Quiescent Current

Zhongming Ye - Applications Engineer Sep 21st 2015
Design Note 544: Introduction Industrial and automotive applications require robust, easy-to-use, compact DC/DC converters to produce a variety of low voltage power supplies. The LT8602 monolithic quad synchronous step-down converter in a 6mm × 6mm package is capable of providing four outputs from a wide input range of ...

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Positive to Negative Converter with Variable Output Using LTC3630 and LT6015/LT6016

Philip Lane - Field Applications Engineer
Gabino Alonso - Strategic Marketing Engineer
Sep 1st 2015
There was a window of time in the 1950s and early ’60s when negative voltage rails were commonplace, when germanium PNP transistors were prevalent—like those used in an old “transistor radio”, now worth a fortune on Ebay. Nowadays, NPN transistors are more prevalent, since they basically work ...

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Data Backup Solution for 1mm, Low Profile Industrial Applications

Victor Khasiev - Applications Engineer Aug 25th 2015
Introduction Data backup and retention during a power interruption is required in a wide variety of industrial and automotive applications, where emergency backup power supplies (such as a UPS) may be unfeasible. For example, a vehicle may need to transmit geographical coordinates and the vehicle ID during an abrupt battery ...

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Robust 140V VIN, 400mA Step-Down Regulator for Industrial, Telecom and Automotive Environments

Mike Shriver - Senior Applications Engineer Aug 20th 2015
Design Note 543: Introduction The LTC®7138 is a 400mA step-down regulator that can operate over an input voltage range of 4V to 140V, ideal for industrial, telecom, automotive and other applications subject to harsh line transients. Due to the regulator’s hysteretic architecture, no external compensation is required. ...

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LTC3890 & LTC4000 60V Input DC/DC Power Supply with Battery Backup

Victor Khasiev - Applications Engineer
Gabino Alonso - Strategic Marketing Engineer
Feb 27th 2015
Introduction Circuitry presented in this article can be very useful for designing compact power supplies and extremely beneficial for system functioning in conditions of input power interruptions. The presented solution can be embedded into uninterruptible power systems or small standalone modules. It can be successfully employed ...

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17V Input, Dual 1A Output Synchronous Step-Down Regulator with Ultralow Quiescent Current

Haoran Wu - Applications Engineer Feb 13th 2015
Design Note DN537: Introduction The LTC®3622 dual 1A synchronous monolithic stepdown regulator enables compact, high efficiency supplies for battery powered systems and portable devices as well as general purpose point-of-load regulation. The tiny 14-pin, 3mm × 4mm DFN package takes input voltages from 2.7V to 17V, ...

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High Efficiency 100mA Synchronous Buck Converter with Wide Input Range from 4V to 150V

Charlie Zhao - Applications Eng Sep 17th 2014
Introduction The wide 4V to 150V input range of the LTC®3639 stepdown DC/DC converter allows automotive, avionics and distributed power systems to: Cover extensive transient requirements Enable multiple wide-ranging input power sources, such as a high voltage DC bus with a low voltage battery backup Create a ...

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

Willie Chan - Sr PME Power Modules
Dong Wang - Applications Engineer
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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Reduce EMI and Improve Efficiency with Silent Switcher Designs

Christian Kueck Dec 17th 2013
Switching regulators replace linear regulators in areas where low heat dissipation and efficiency are valued. The switching regulator is typically the first active component on the input power bus line, and therefore has a significant impact on the EMI performance of the complete converter circuit. Modern input filter components ...

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Versatile Industrial Power Supply Takes High Voltage Input and Yields from Eight 1A to Two 4A Outputs

Martin Merchant - Sr. Applications Engineer Nov 1st 2013
Introduction Today’s industrial electronic systems contain many of the same components as consumer electronics— microcontrollers, FPGAs, system-on-chip ASICs and other electronics—requiring multiple low voltage rails at widely varied load currents. Industrial applications can also demand a pushbutton interface, ...

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65V, 500mA Step-Down Converter Fits Easily into Automotive and Industrial Applications

Charlie Zhao - Applications Eng Mar 1st 2013
Introduction The trend in automobiles and industrial systems is to replace mechanical functions with electronics, thus multiplying the number of microcontrollers, signal processors, sensors and other electronic devices throughout. The issue is that 24V truck electrical systems and industrial equipment use relatively high voltages ...

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42V, 2.5A Synchronous Step-Down Regulator with 2.5μA Quiescent Current

Walker Bai - Applications Enginneer Jul 1st 2012
Introduction The LT®8610 and LT8611 are 42V, 2.5A synchronous step-down regulators that meet the stringent high input voltage and low output voltage requirements of automotive, industrial and communications applications. To minimize external components and solution size, the top and bottom power switches are integrated ...

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