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Solutions Search - Step-Down (Buck) Regulators

Silent Switcher 2: Dual 4A per Channel, 42V Micropower Step-Down Regulator

John Gardner - Design Engineer Oct 16th 2017
As automotive electronic content increases, voltage regulators continually need smaller size, higher current, and lower radiated emissions.  Silent Switcher® 2 products address this need by providing 2MHz solutions with high efficiency without compromising EMI performance. The LT8650S is a dual channel, 42V step-down ...

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105V, 2.3A Low-EMI Synchronous Step-Down Regulator

Charles Hawkes - Design Aug 16th 2017
Today, many electronic systems require power processing at higher voltages, while simultaneously demanding increased efficiency and low EMI/EMC emissions. The LTC7103 meets all of these challenges, with an unprecedented combination versatility and simplicity. The LTC7103 is a 105V, 2.3A, synchronous step-down regulator that ...

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100V, Bidirectional Multiphase Synchronous Buck or Boost Controller

Ding Li - Senior Power Applications Engineer, Power Products Mar 31st 2017
Current 12V automotive systems are reaching their 3kW power limit due to the ever-increasing demand for more electrical devices. A newly proposed standard, LV148, combines a secondary 48V bus with the existing 12V system. Benefits of this technology include increased available energy that allows for more electrical circuits ...

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Quad 3A, Ultrathin uModule Regulator Fits on the Backside of PCB

Richard Ying - µModule® Regulator Design Engineer Feb 17th 2017
The LTM4643 is a quad output step-down µModule® (power module) regulator, configurable as a single output (12A), dual (6A & 6A or 9A & 3A), or quad (3A each) regulator in a 9mm x 15mm x 1.82mm ultrathin LGA package. This flexibility enables system designers to rely on one simple and compact µModule regulator ...

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40A μModule Regulator with, 88% Efficiency, 0% Derating at 85°C, and 40°C Rise

Eddie Beville - Module Design Manager Oct 27th 2016
The LTM4636 is a 40A step-down µModule switching regulator with 3D packaging construction for quicker heat dissipation and cooler operation in a small package. By stacking its inductor on top of a 16mm x 16mm BGA package, the LTM4636 benefits from the exposed inductor as a heat sink permitting direct contact with airflow ...

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LTC3871 Bidirectional PolyPhase® Synchronous Buck or Boost Controller - Video Product Brief

Bruce Haug - Product Marketing Engineer Oct 6th 2016
The LTC®3871 is a high performance bidirectional buck or boost switching regulator controller that operates in either buck or boost mode on demand. It regulates in buck mode from VHIGH-to-VLOW and boost mode from VLOW-to-VHIGH depending on a control signal, making it ideal for 48V/12V automotive dual battery systems. An ...

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Low Voltage Power Supplies

Robert Dobkin - Chief Technical Officer Jun 9th 2016
In this video, Linear Technology Co-founder and CTO Bob Dobkin discusses low voltage power supplies less than half a volt. Most of today's power supplies have a reference of 0.6 volts, which means the output voltage must be greater than 0.6 volts. Several years ago, Linear Technology pioneered a new type of current source reference ...

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LTC3895 150VIN, Synchronous Step-Down Controller with 40μA Iq - Video Product Brief

Bruce Haug - Product Marketing Engineer May 16th 2016
The LTC®3895 is a high performance step-down switching regulator DC/DC controller that drives an all N-channel synchronous power MOSFET stage that can operate from input voltages up to 140V (150V abs max). A constant frequency current mode architecture allows a phase-lockable frequency of up to 850kHz. The gate drive ...

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60V, 4A Monolithic Buck Regulator w/ Rail-to-Rail Programmable Output and Integrated Current Monitoring

Steve Zhou - Senior Design Engineer Apr 12th 2016
The LTC3649 step-down regulator combines key features of a high voltage buck regulator with a complete feature set that allows for ease of use in a variety of applications.  The output voltage can be programmed with one resistor from ISET to GND, or it can be programmed directly with a voltage on the ISET pin.  The ...

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LTC7851/-1 Quad Output, Step-Down Voltage Mode DC/DC Controller with Accurate Current Sharing - Video Product Brief

Bruce Haug - Product Marketing Engineer Mar 17th 2016
 The LTC®7851/LTC7851-1 are quad output multiphase synchronous step-down switching regulator controllers that employ a constant frequency voltage mode architecture. They maintain excellent current balance between channels when paralleled with their internal current sharing loop. Lossless DCR or a low value RSENSEis ...

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LTC3892/-1 Dual, 60VIN Micropower Synchronous Buck Controller - Video Product Brief

Bruce Haug - Product Marketing Engineer Mar 3rd 2016
The LTC®3892/LTC3892-1/LTC3892-2 is a high performance dual step-down DC/DC switching regulator controller that drives all N-channel synchronous power MOSFET stages. Power loss and noise are minimized by operating the two controller output stages out-of-phase. The gate drive voltage can be programmed from 5V to 10V to allow ...

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LTC3877 2-Phase Synchronous Buck Controller with VID Programming & mΩ DCR Sensing - Video Product Brief

Bruce Haug - Product Marketing Engineer Mar 1st 2016
The LTC®3877 is a VID-programmable, constant frequency current mode step-down controller using an advanced and proprietary architecture. This new architecture enhances the signal-to-noise ratio of the current sense signal, allowing the use of very low DC resistance power inductors to maximize efficiency in high current applications. ...

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Quad Buck Regulators in an Impossibly Small Space

Michael Nootbaar - Sr. Design Engineer Nov 11th 2015
Frequently, the power supply gets whatever board space is left over regardless of how impossibly small. Using Linear’s latest Quad Buck regulator, the LT8602, you can have four regulated outputs in an incredibly small space. The LT8602 has two high voltage buck regulators with an input voltage range of 3V to 42V. It also ...

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LT8709 Negative Input Synchronous Multi-Topology DC/DC Controller - Video Product Brief

Bruce Haug - Product Marketing Engineer Mar 25th 2015
The LT®8709 is a synchronous PWM controller for negativeto- negative or negative-to-positive DC/DC conversion, with rail-to-rail output current monitor and control. The LT8709 is ideal for many local power supply designs. It can be easily configured in buck, boost, buck-boost, and inverting topologies with negative ...

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LTC3899 Triple Output, 60VIN/60VOUT Low Iq, Synchronous Buck/Buck/Boost Controller - Video Product Brief

Bruce Haug - Product Marketing Engineer Mar 24th 2015
The LTC®3899 is a high performance triple output (buck/ buck/boost) DC/DC switching regulator controller that drives all N-channel synchronous power MOSFET stages. The constant frequency current mode architecture allows a phase-lockable frequency of up to 850kHz. The LTC3899 operates from a wide 4.5V to 60V input supply ...

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

Bruce Haug - Product Marketing Engineer 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 from ...

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

Bruce Haug - Product Marketing Engineer 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 battery-powered ...

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A Guide to Ordering Custom Programmed Digital Power System Management Devices

Bruce Haug - 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 development ...

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More Power, Better Heat Dissipation, Smaller PCB Area

Yan Liang - Applications Engineer 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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Guide To Ordering LTC's Custom-Programmed EEPROM Devices

Bruce Haug - Product Marketing Engineer Sep 11th 2014
Click Here To Order Custom Programmed Parts Welcome to Linear Technology’s NVM (Non-Volatile Memory) Programming Service video product brief tutorial for Digital Power System's Management Products. This tutorial will go through the process of ordering custom-programmed first articles or prototypes. Devices eligible ...

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

Jeff Gruetter - Product Marketing Engineer 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 outputs ...

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

Bruce Haug - Product Marketing Engineer 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 the efficiency ...

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

Bruce Haug - Product Marketing Engineer 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 - Product Marketing Engineer 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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LTM8052 TechClips - Output Current Limit Protection

Walker Bai - Applications Enginneer
Willie Chan - Sr PME Power Modules
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

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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LTM4644 TechClips - Efficiency and Thermal Performance

Sam Young - Applications Engineer
Willie Chan - Sr PME Power Modules
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 delivers ...

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LTM4624 TechClips - Efficiency, Thermal and Load Transient Performance

Sam Young - Applications Engineer
Willie Chan - Sr PME Power Modules
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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MOSFET Failure Protection for Single Output PolyPhase Converter

Mike Shriver - Senior Applications Engineer 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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How to Probe the Switch Node of a μModule Regulator

Willie Chan - Sr PME Power Modules 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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LTC3774 Dual, Multiphase,Synchronous Current Mode Controller for Sub-mΩ DCR Sensing

Bruce Haug - Product Marketing Engineer Dec 19th 2013
The LTC®3774 is a dual PolyPhase® current mode synchronous step-down switching regulator controller that drives power blocks, DRMOS or external gate drivers and power MOSFETs. It offers an LTC-proprietary technique that enhances the signal-to-noise ratio of the current sense signal, allowing the use of inductors with ...

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LTM4611 TechClips - Ultralow VIN, 15A DC/DC μModule Regulator

Jason Sekanina - Power Module Design Engineer Nov 5th 2013
15A High Efficiency Output from a Low Input Voltage The LTM4611 is a switch mode, step-down DC/DC μModule® regulator in a compact 15mm × 15mm × 4.32mm LGA surfacemount package. The switching controller, MOSFETs, inductor and supporting components are housed in the package. With a built-in differential remote ...

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What Is Digital Power System Management?

Afshin Odabaee - Business Manager - uModule Power Products Nov 4th 2013
Power management of a high rail count circuit board can be very difficult with meters and oscilloscopes. There is a growing trend to configure and monitor power supplies over a digital communications bus. “Digital Power” or “Digital Power System Management (PSM)” allows systems designers to simplify and ...

Video LTpowerPlay 

 

Power USB VBUS in Autos with the LT8697

Trevor Crane - Design Engineer Jul 15th 2013
USB sockets appear in an increasing number of car models as portable devices become more ubiquitous. The USB interface delivers power to portable devices via the 5V VBUS and ground lines. Depending on the USB version and the portable device, the VBUS sources up to 2.1A. In a car, this high VBUS current presents a challenge. ...

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150V, 100mA Step-Down Regulator Requires Only Three External Components

Jason Leonard - Design Manager Jun 18th 2013
The LTC3639 step-down regulator integrates key high performance features into one compact IC. It is capable of up to 150V input voltage and 100mA output current, utilizing synchronous rectification and low quiescent current to maintain high efficiency over a broad spectrum of load current. Its adjustable output can be programmed ...

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LTM8028 TechClips - 36VIN, UltraFast, Low Output Noise 5A μModule Regulator

Afshin Odabaee - Business Manager - uModule Power Products May 1st 2013
The LTM8028 is a 1mV output ripple μModule (micromodule) regulator designed to power data converters and high speed transceivers. The low output ripple minimizes random jitter in high speed data transceivers for superior bit error rate (BER) performance. When powering an analog-to-digital converter (ADC), tests showed a 13dB ...

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LTC3375 8-Ch Programmable, Parallelable 1A Buck PMIC - Video Product Brief

Steve Knoth - Senior Product Marketing Engineer Mar 25th 2013
The LTC®3375 is a digitally programmable high efficiency multioutput power supply IC. The DC/DCs consist of eight synchronous buck converters (IOUT up to 1A each) all powered from independent 2.25V to 5.5V input supplies. DC/DC enables, output voltages, operating modes, and phasing may all be independently programmed over ...

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LTM4641 TechClips - Efficiency, Output Overvoltage Protection, Overcurrent Protection and More

Afshin Odabaee - Business Manager - uModule Power Products Feb 6th 2013
The LTM4641 is a 4.5V to 38V input, 0.6V to 6V output, 10A step-down μModule® regulator with comprehensive electrical and thermal protection for loads such as processors, ASICs and high-end FPGAs. The LTM4641 μModule regulator monitors input voltage, output voltage and temperature conditions. If any user-adjustable ...

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Single Phase Step-Down DC/DC Controller with Digital Power System Management and Input Current Sense

Yi Sun - Applications Engineer Oct 4th 2012
The digital power supply market has achieved rapid progress in the recent years. Easy configuration, accurate telemetry, convenient fault analysis and reliability are the trends for the modern digital power supply, which are all provided by Linear’s new digital power controller, the LTC3883. The LTC3883 is a single phase ...

Video LTpowerPlay 

 

High Efficiency Dual 13A or Single 26A μModule Regulator

Eddie Beville - Module Design Manager Sep 10th 2012
Linear Technology's LTM4620 uses a proprietary lead frame design to package high power regulators into a very small form factor with effective thermal conduction through the top and bottom of the µmodule product. The device can be connected in parallel to support higher current applications with very accurate current sharing ...

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High Efficiency, Ultralow IQ, 42V, 2.5A Sync Buck Regulator

Leonard Shtargot - Design Enginner Jun 14th 2012
The LT®8610 step-down regulator integrates key high performance features in one compact IC. It offers synchronous rectification, for efficiencies up to 96%. The low quiescent current of 2.5µA extends battery life and saves extra circuitry. High speed switching minimizes board space and helps avoid EMI problems. A low dropout ...

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LTC3866 Current Mode Synchronous Controller for Sub Milliohm DCR Sensing - Video Product Brief

Bruce Haug - Product Marketing Engineer May 2nd 2012
The LTC®3866 is a single phase current mode synchronous step-down switching regulator controller that drives all N-channel power MOSFET switches. It employs a unique architecture which enhances the signal-to-noise ratio of the current sense signal, allowing the use of a very low DC resistance power inductor to maximize the ...

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Switching Regulator Power Loss

Robert Dobkin - Chief Technical Officer Jan 9th 2012
Efficiency is a misleading number for comparison of switching regulators. The efficiency number can be manipulated by the input and output voltage, while power loss is more tightly tied to the actual circuit. This video explains why. ...

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Wide VIN Range Step-Down Regulators Consume Only 2.8μA Input Current

John Gardner - Design Engineer May 23rd 2011
Battery life is paramount in modern battery-powered systems. Portable applications, such as remote sensors, require voltage regulators which have low current standby states and also able to provide bursts of high power. Linear Technology’s LT®3970/LT3971 lead the industry in low current standby mode by consuming only ...

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Integration of Analog DC/DC Controller with Digital Power Management

Yi Sun - Applications Engineer Mar 21st 2011
Modern electronics systems require high performance point of load power supplies with advanced and intelligent power management. Linear Technology’s LTC®3880 combines a best in class analog switching regulator controller with precise mixed signal data conversion for unsurpassed ease of power system design and management. ...

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Low Noise μModule DC/DC Converters Simplify EMI Design - LTM8032, LTM8031, LTM8020, LTM8021, LTM4606

David Ng - Module Devleopment Manager Sep 15th 2009
Electromagnetic interference (EMI)falls into two broad catgories - conducted and radiated. Conducted emissions refers to the noise that is carried on wires or other conductors, while radiated EMI floats through the air. While conducted EMI is certainly problematic, it is radiated EMI that makes design engineers cringe. Linear ...

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How to Design a Complex Switching Regulator as Simple as a Linear Regulator - MicroModules

Eddie Beville - Module Design Manager Dec 15th 2008
There is an alternative solution when deciding between a step-down switching regulator and a linear regulator. Switching regulators dissipate less heat than linear regulators especially when the input voltage is much higher than the output voltage or the output load current is relative high. On the other hand, linear regulators ...

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Voltage vs. Current Mode Control Current Sharing in a PolyPhase DC/DC Converter - LTC3731, LTC3853, LTC3850

Henry Zhang - Applications Engineering Manager Dec 15th 2008
Current sharing performance is critical for PolyPhase DC/DC converter to balance the thermal stress and properly size the power components. The PolyPhase converter can be controlled by either voltage or current mode control scheme. With voltage mode control, the active current sharing is achieved with a complicated external ...

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