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  Basic Concepts of Linear Regulator and Switching Mode Power Supplies &mdash AN140
  PDF, 715 Kb, Datei veröffentlicht: Oct 1, 2013
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  Application Note 140
  October 2013
  Basic Concepts of Linear Regulator and Switching
  Mode Power Supplies
  Henry J. Zhang
  ABSTRACT
  This article explains the basic concepts of linear regulators
  and switching mode power supplies (SMPS). It is aimed
  at system engineers who may not be very familiar with
  power supply designs and selection. The basic operating
  principles of linear regulators and SMPS are explained
  and the advantages and disadvantages of each solution
  are discussed. The buck step-down converter is used as
  an example to further explain the design considerations
  of a switching regulator.
  INTRODUCTION
  Today’s designs require an increasing number of power
  rails and supply solutions in electronics systems, with
  loads ranging from a few mA for standby supplies to over
  100A for ASIC voltage regulators. It is important to choose
  the appropriate solution for the targeted application and
  to meet specified performance requirements, such as
  high efficiency, tight printed circuit board (PCB) space, …

Artikel

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  Produce High DC/DC Step-Down Ratios in Tight Spaces with 30ns Minimum On-Time Controller in 3mm × 3mm QFN &mdash LT Journal
  PDF, 450 Kb, Datei veröffentlicht: Dec 1, 2009
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  L DESIGN FEATURES Produce High DC/DC Step-Down
  Ratios in Tight Spaces with 30ns
  Minimum On-Time Controller in
  3mm Г— 3mm QFN
  by Theo Phillips
  Introduction
  It can be a challenge to design a DC/
  DC converter that takes a high voltage
  automotive or industrial power supply
  down to the 1.5V or lower voltages
  required by today’s microprocessors
  and programmable logic chips.
  To maintain efficiency and performance, designers are often forced to
  create a 2-stage solution, which first
  steps down to an intermediate voltage
  and uses another converter to produce
  the low voltage from there. 2-stage
  solutions can perform well, and are
  handy if the application can use the
  intermediate voltage elsewhere, but
  2-stage solutions always take more
  space and are more costly than a single
  stage solution. …

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Herstellerklassifikation

• Power Management > Switching Regulator > Step-Down (Buck) Regulators > External Power Switch Buck Controllers

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LTC3775IUDPBF, LTC3775IUD PBF