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27 Feb 2015

TPS54020

PMP9194 uses the TPS54020 synchronous-buck SWIFT converter with integrated FETs to provide a 10A/1V solution in less than 22mmx12mm of total board space area. This reference design uses a small 1.1uH inductor, 2x100uF ceramic output capacitors, and small 0402 external components to save space. The device switches at 300kHz and acheives 87% peak efficiency from a 12V input to a 1V output. The TPS54020 is ideal for powering low-voltage, high-current DSPs and FPGAs, and can be synchronized 180 degrees out-of-phase with another TPS54020 to reduce input ripple.

4.5V to 17V Input, 10-A Synchronous Buck Converter Optimized for Small Size and Low Output Voltage - [Link]

3 Feb 2015

8709

by Susan Nordyk @ edn.com:

A synchronous PWM controller for negative-to-negative or negative-to-positive DC/DC conversion, the LT8709 from Linear Technology is easily configured for buck, boost, buck-boost, and inverting topologies to accommodate a wide range of power-supply designs. The device’s synchronous operation means that the output diode is replaced with a high-efficiency P-channel MOSFET, increasing efficiency and allowing for higher output currents of up to 20 A. It also eliminates the heat sink typically required in medium- to high-power applications.

The LT8709 operates over an input range of -4.5 V to -80 V and produces an output from -0.1 V to as high as 60 V or from -1.4 V to as low as -80 V. Its rail-to-rail output-current monitor and control enable the device to be configured as a current source. The controller has an EN/FBIN pin that accepts slowly varying input signals, as well as an adjustable undervoltage lockout function.

Buck/boost/inverting controller delivers up to 20 A - [Link]

3 Dec 2014

32050

by linear.com:

The LT®8613 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 3μA of quiescent current. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components. The built-in current sense amplifier with monitor and control pins allows accurate input or output current regulation and limiting. Low ripple Burst Mode operation enables high efficiency down to very low output currents while keeping the output ripple below 10mVP-P. A SYNC pin allows synchronization to an external clock.

LT8613 – 42V, 6A Synchronous Step-Down Regulator with Current Sense - [Link]

2 Dec 2014

3790

by Susan Nordyk @ edn.com

Based on a four-switch single-inductor architecture, the LT3790 synchronous buck-boost DC/DC controller from Linear Technology accommodates an input of 4.7 V to 60 V and delivers up to 250 W of continuous power for use in a variety of automotive and industrial applications. The device operates from input voltages above, below, or equal to the output voltage, making it well-suited for automotive designs where the input voltage can vary dramatically during stop/start, cold crank, and load dump.

LT3790 – 60V Synchronous 4-Switch Buck-Boost Controller - [Link]


2 Dec 2014

3807Col

by linear.com:

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 systems. OPTI-LOOP® compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3807 features a precision 0.8V reference and power good output indicator. A wide 4V to 38V input supply range encompasses a wide range of intermediate bus voltages and battery chemistries. The output voltage of the LTC3807 can be programmed between 0.8V to 24V.

LTC3807 – 38V Micropower Synchronous Buck Controller with VOUT to 24V - [Link]

30 Oct 2014

TypAppx600

by Steve Taranovich @ edn.com:

With many switching buck regulators on the market today that are capable of improving an automotive system design it is hard to choose the optimum one for your design. I patricularly like a new Linear Technology solution, the LT8609, a 2A, 42V input synchronous step-down switching regulator because it is unique in that it does not require an external flyback diode (sometimes called a snubber diode, freewheeling diode, suppressor diode, suppression diode, clamp diode or catch diode) which is a diode used to eliminate flyback, which is the sudden voltage spike seen across an inductive load when its supply voltage is suddenly reduced or removed. This makes for less external components.

Linear Technology 2A buck converter is 93% efficient at 2MHz - [Link]

23 Oct 2014

Micrel 33163by Susan Nordyk @ edn.com:

Micrel’s family of low-profile step-down power modules integrates a synchronous buck regulator with an inductor into a 2.5×3×1.1-mm QFN package for the 1-A MIC33163/33164 and a 2.5×3×1.9-mm QFN package for the 2-A MIC33263/33264. The modules offer 100% duty cycle operation and accommodate an input voltage range of 2.7 V to 5.5 V.

DC/DC buck power modules fit tight spaces - [Link]

29 Aug 2014

fbd_slvscf9c

The TPS65262 is a monolithic triple synchronous step-down (buck) converter with 3-A/1-A/1-A output current. A wide 4.5- to 18-V input supply voltage range encompasses the most intermediate bus voltage operating off 5-, 9-, 12-, or 15-V power bus. The converter, with constant frequency peak current mode, is designed to simplify its application while giving designers options to optimize the system according to targeted applications.

TPS65262 – Triple Synchronous Step-Down Converter with 200mA/100mA Dual LDOs - [Link]

23 Aug 2014

by Afrotechmods:

I explain buck converters (a type of switch mode power supply) and how to build a 5V 5A power supply using an LM2678.

How to build a switch mode power supply! DC-DC buck converter tutorial! - [Link]

29 Dec 2013

photo_1_th

The PicoBuck is a small and inexpensive 3-channel LED driver. It employs constant-current buck driving which approaches an efficiency of 95% (theoretical). It’s based on AL8805 LED Lighting Buck Driver from Diodes Inc.

PicoBuck – RGB LED Driver - [Link]



 
 
 

 

 

 

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