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  Triple Buck Regulator Features 1-Wire Dynamically Programmable Output Voltages &mdash DN459
  PDF, 112 Kb, Datei veröffentlicht: Jan 20, 2009
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  Triple Buck Regulator Features 1-Wire Dynamically
  Programmable Output Voltages
  Design Note 459
  Andy Bishop
  Introduction
  The LTC В®3569 is a compact power solution for handheld
  devices. Its tiny 3mm Г— 3mm QFN package includes
  three buck regulators with individually programmable
  output voltages. One regulator supports load currents
  up to 1200mA, while the other two support currents to
  600mA. Two regulators can be paralleled for increased
  load capability. Each current-mode regulator is internally
  compensated with excellent load and line regulation. A
  complete 2-or 3-output solution requires a minimum
  number of external passive components.
  Three Individually Programmable Bucks
  The LTC3569’s three output voltages are independently
  programmed by simply toggling their respective enable
  pins. Each time an enable pin sees a falling edge, a 4-bit
  counter is decremented. After a time-out delay of 120Ојs
  from the last rising edge at the enable pins, the counter
  state is latched into the feedback reference voltage DAC.
  In this way, the reference voltage can be programmed …

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Herstellerklassifikation

• Power Management > Switching Regulator > Step-Down (Buck) Regulators > Internal Power Switch Buck | Multiple Output Buck | Micropower Buck Regulators

Andere Namen:

LTC3569EFEPBF, LTC3569EFE PBF