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  Two Monolithic DC/DC Converters Take 3.6V-15V Inputs Down to 0.6V at High Frequency, Shrinking Battery-Powered Applications in Everything from Handhelds to Automobiles &mdash LT Journal
  PDF, 829 Kb, File published: Jul 15, 2011
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  Two Monolithic DC/DC Converters Take 3.6V–15V Inputs
  Down to 0.6V at High Frequency, Shrinking Battery-Powered
  Applications in Everything from Handhelds to Automobiles
  Mylien Tran and Theo Phillips When a relatively high voltage rail (12V) must be stepped down to a relatively low level
  (3.3V, 1.8V), the traditional go-to converter is a DC/DC switching controller that drives
  external MOSFETs. In many applications, replacing the typical controller-MOSFETdiode combo with a monolithic regulator would save space, design time and cost.
  The problem is that 12V rails are too high for many monolithic buck converters, which
  usually cannot be used with inputs above 6V. Additionally, switching losses typically
  prevent practical operation above ~1MHz, precluding the use of the smallest possible
  inductors, and in the end, negating some size advantages of a monolithic regulator.
  The LTC3601 and LTC3604 are high
  performance monolithic synchronous
  step-down regulators capable of supplying up to 1.5A and 2.5A, respectively. They
  operate from a wide input voltage range
  of 3.6V to 15V—a range encompassing
  battery chemistries found in handheld
  devices, PCs, and automobiles. Their
  unique constant frequency/controlled on
  time architecture has a minimum on-time
  of 20ns, ideal for high step-down ratio
  applications that demand high switching
  frequencies and fast transient response
  while maintaining high efficiency. …

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Manufacturer's Classification

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

Other Names:

LTC3604IMSEPBF, LTC3604IMSE PBF