Solutions Search - Internal Power Switch Buck

High Efficiency, 15V Rail-to-Rail Output Synchronous Step-Down Regulator Can Source or Sink 5A

Tim Kozono - Applications Engineer Jan 23rd 2017
Design Note 560: Introduction The LTC®3623 is a high efficiency, monolithic synchronous step-down regulator capable of sourcing or sinking up to 5A of continuous output current from an input voltage range of 4V to 15V. Its compact 3mm × 5mm QFN package incorporates an abundance of features including a low EMI Silent ...

 

60V Input Monolithic Converter Powers Critical Circuits without Supercaps or Other Additional Components

Victor Khasiev - Applications Engineer Nov 15th 2016
Design Note DN1040: Introduction The LTC3649 is a monolithic step-down regulator capable of operating from an input voltage range of 3.1V to 60V, and efficiently producing a (single) resistorprogrammable output voltage at up to 4A of output current. These features alone make it a compelling industrial or automotive supply for ...

 

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 ...

 

6A Monolithic Synchronous DC/DC Step-Down Converter with Digital Power System Management

Haoran Wu - Applications Engineer Aug 10th 2016
Design Note 554: Introduction Digital Power System Management (PSM) controllers usually target high current point-of-load (POL) applications. Lower current applications, with up to 6A load current, can also benefit from PSM features. The LTC®3815 is a 6A monolithic synchronous stepdown converter with digital power monitoring ...

 

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, ...

 

60V, 4A Synchronous Monolithic Step-Down Regulator Has Rail-to Rail Operation

Apr 5th 2016
Design Note 550: Introduction The LTC3649 is a high efficiency synchronous monolithic step-down regulator, which integrates top and bottom N-channel MOSFETs on the die. This regulator features a wide input voltage range, 3.1V to 60V, and a wide output voltage range from 0V to (VIN − 0.5V). This extremely wide range of ...

 

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 ...

 

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 ...

 

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 ...

 

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 ...

 

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. ...

 

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, ...

 

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 ...

 

The Low Output Voltage Ripple Zeta DC/DC Converter Topology

Mathew Wich - Design Section Leader
Fu Sun - Design Engineer Apr 28th 2014
In the world of switching DC/DC converters the Zeta topology is a lesser known relative of the SEPIC topology. Both converters provide a positive output voltage that can be greater than, equal to or less than VIN while avoiding the complexity and cost of a buck-boost converter. The Zeta converter however, has the advantage of ...

 

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 ...

 

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, ...

 

The Right Power Supply Can Simplify Automotive ECU Design

Christian Kueck Apr 30th 2013
In my last entry, I boiled down the design of automotive electronic modules or ECUs to the ability to meet three essential requirements: Can handle high voltage situations like load dumps or double-battery jumps. Can ride-through low voltage cold crank conditions Draw minimal current in standby conditions, a.k.a. low quiescent ...

 

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 ...

 

20V, 2.5A Monolithic Synchronous Buck SWITCHER+ with Input Current, Output Current and Temperature Sensing/Limiting Capabilities

Tom Gross - Applications Engineer Feb 1st 2013
Introduction The LTC®3626 synchronous buck regulator with current and temperature monitoring is the first of Linear’s SWITCHER+™ line of monolithic regulators. It is a high efficiency, monolithic synchronous step-down switching regulator capable of delivering a maximum output current of 2.5A from an input voltage ...

 

1.5A Rail-to-Rail Output Synchronous Step-Down Regulator Adjusts with a Single Resistor

Jeff Zhang - Design Engineer Sep 1st 2012
Introduction A new regulator architecture the LTC3600 (first introduced with the LT3080 linear regulator) has wider output range and better regulation than traditional regulators. Using a precision 50μA current source and a voltage follower, the output is adjustable from “0V” to close to VIN. Normally, the lowest ...

 

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 ...