Datasheet Linear Technology LTC3600IMSE#PBF

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Design Notes

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  1.5A Rail-to-Rail Output Synchronous Step-Down Regulator Adjusts with a Single Resistor &mdash DN506
  PDF, 520 Kb, File published: Mar 13, 2012
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  1.5A Rail-to-Rail Output Synchronous Step-Down Regulator
  Adjusts with a Single Resistor
  Design Note 506
  Jeff Zhang
  Introduction
  A new regulator architecture the LTC3600 (first introduced with the LT3080 linear regulator) has wider output
  range and better regulation than traditional regulators.
  Using a precision 50ВµA current source and a voltage
  follower, the output is adjustable from “0V” to close
  to VIN. Normally, the lowest output voltage is limited
  to the reference voltage. However, this new regulator
  has a constant loop gain independent of the output
  voltage giving excellent regulation at any output and
  allowing multiple regulators to be paralleled for higher
  output currents.
  Operation
  The LTC3600 is a current mode monolithic step-down
  buck regulator with excellent line and load transient
  responses. The 200kHz to 4MHz operating frequency
  can be set by a resistor or synchronized to an external
  clock. The LTC3600 internally generates an accurate
  50ОјA current source, allowing the use of a single external LTC3600 VIN VIN
  12V resistor to program the reference voltage from 0V to …

Articles

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  1.5A Rail-to-Rail Output Synchronous Step-Down Regulator Adjusts with a Single Resistor &mdash LT Journal
  PDF, 2.2 Mb, File published: Jul 20, 2012
  Extract from the document

  1.5A Rail-to-Rail Output Synchronous Step-Down Regulator
  Adjusts with a Single Resistor
  Jeff Zhang The LTC3600 features a
  wide output range with
  tight regulation over the
  entire range. In most
  regulators, the lowest
  output voltage is limited
  to the reference voltage.
  The LTC3600, however,
  uses a novel regulation
  scheme with a precision
  50ВµA current source and
  a voltage follower, creating
  an adjustable output from
  “0V” to close to VIN. It
  also features constant
  loop gain, independent of
  the output voltage, giving
  excellent regulation at any
  output and allowing multiple
  regulators to be paralleled
  for high output currents. LTC3600 VIN VIN …

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Manufacturer's Classification

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

Other Names:

LTC3600IMSEPBF, LTC3600IMSE PBF