Datasheet Linear Technology LTM8028

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Design Notes

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  36V Input, Low Output Noise, 5A ОјModule Regulator for Precision Data Acquisition Systems &mdash DN518
  PDF, 769 Kb, File published: Aug 9, 2013
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  advertisement 36V Input, Low Output Noise, 5A ВµModule Regulator for
  Precision Data Acquisition Systems – Design Note 518
  Jaino Parasseril
  Introduction
  Low output noise, fast transient response and high
  efficiency are just a few of the stringent power supply
  demands made by applications featuring high data rate
  FPGA I/O channels and high bit count data converters.
  The power supply designer faces the difficult task of
  meeting all of these requirements with as few components as possible, since no single topology easily
  meets all three.
  For instance, high performance linear regulators
  achieve the required low output noise and fast transient response, but tend to dissipate more power than
  a switching topology, resulting in thermal issues.
  Switching regulators, on the other hand, are generally
  more efficient and run cooler than linear regulators,
  but generate significantly more output noise and cannot respond as quickly to transients. Power supply
  designers often resort to combining the two topologies,
  using a switching regulator to efficiently step down a
  relatively high bus voltage, followed by a linear post
  regulator to produce a low noise output. Although it is
  possible to produce a low noise supply in this way, it
  requires careful design to achieve high efficiency and …

Articles

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  High Efficiency Switching Power Conversion Combined with Low Noise Linear Regulation in µModule Package &mdash LT Journal
  PDF, 2.8 Mb, File published: Jul 9, 2013
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  High Efficiency Switching Power Conversion Combined with
  Low Noise Linear Regulation in ВµModule Package
  David Ng Devices with high speed
  or high resolution functions
  require clean power.
  Switching regulators offer
  efficiency across a variety
  of input/output conditions,
  but the typical switcher is
  hard pressed to deliver the
  clean, low output noise
  and fast transient response
  needed by high data rate
  FPGA I/O channels or high
  bit count data converters. In
  contrast, high performance
  linear regulators feature
  low output noise and fast
  transient response, but
  can quickly heat up. Figure 2. In a 12V input to 1.2V output, 5A
  application, the LTM8028 dissipates less than 4W
  and heats up by only 45В°C. POWER LOSS (W) 4 40 3 30
  TEMP RISE 2 20 POWER LOSS 1 0 10 0 1 LTM8028 VIN …

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Manufacturer's Classification

• Power Management > Switching Regulator > Ultralow Noise Regulators
• µModule Solutions > µModule Regulators > µModule Buck Regulators | Extended Temperature (H & MP) µModule Regulators