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Design Notes

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  How to Produce Negative Output Voltages from Positive Inputs Using a uModule Step-Down Regulator &mdash DN1021
  PDF, 120 Кб, Файл опубликован: 24 май 2011
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  How to Produce Negative Output Voltages from Positive Inputs
  Using a ВµModule Step-Down Regulator
  Design Note 1021
  Jaino Parasseril
  Introduction
  Linear Technology’s DC/DC step-down μModule ®
  regulators are complete switchmode power supplies in a
  surface-mount package. They include the DC/DC controller, inductor, power switches and supporting circuitry.
  These highly integrated regulators also provide an easy
  solution for applications that require negative output
  voltages. In other words, these products can operate as
  inverting buck-boost regulators. As a result, the lowest
  potential in the circuit is not the standard 0V, but –VOUT,
  which must be tied to the μModule regulator’s GND. All
  signals are now referred to –VOUT.
  For this discussion, the LTMВ®8025 (36V, 3A) is used to
  demonstrate how a buck ОјModule regulator can be altered
  to produce a negative output voltage with level-shifting
  circuitry for synchronization. This approach can be applied to other ОјModule regulators, such as the LTM8022
  (36V, 1A), LTM8023 (36V, 2A) and LTM8027 (60V, 4A).
  Design Guide
  A conventional buck (step-down) ОјModule regulator
  can be easily conп¬Ѓgured to generate negative output …

Модельный ряд

Классификация производителя

• Power Management > Switching Regulator > Step-Down (Buck) Regulators > High Input Voltage Buck
• µModule Solutions > µModule Regulators > µModule Buck Regulators | Extended Temperature (H & MP) µModule Regulators