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  Low EMI Synchronous DC/DC Step-Down Controllers Offer Programmable Output Tracking &mdash DN382
  PDF, 122 Kb, 档案已发布: Dec 9, 2005
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  advertisement Low EMI Synchronous DC/DC Step-Down Controllers Offer
  Programmable Output Tracking – Design Note 382
  Charlie Zhao
  Introduction
  The LTCВ® 3808 synchronous DC/DC step-down controller
  packs numerous features required by the latest electronic
  devices into a low profile (0.75mm) 3mm × 4mm leadless
  DFN package or a leaded SSOP-16 package. Two similar
  parts, the LTC3809 and LTC3809-1, are even smaller, but
  less feature-rich versions of the LTC3808. The LTC3809
  family is available in a 3mm Г— 3mm leadless DFN package
  or a 10-pin MSOP Exposed Pad package. All three parts
  can provide output voltages as low as 0.6V and output
  currents as high as 7A from a 2.75V to 9.8V input range,
  making them ideal devices for one or two lithium-ion cell
  inputs as well as distributed DC power systems.
  The LTC3808 and LTC3809 also include important
  features for noise-sensitive applications, including a
  phase-locked loop (PLL) for frequency synchronization
  and spread spectrum frequency modulation to minimize
  generated electromagnetic interference (EMI). The
  adjustable operating frequency (300kHz to 750kHz) allows
  the use of small surface mount inductors and ceramic …

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

其他名称:

LTC3809EMSEPBF, LTC3809EMSE PBF