HT77XX    PFM Step-up DC-DC Converter

Revision # 1.90   Modifications made on October 13, 2010

  • In the Features, the Selection Table and other related sections,a new part number, the HT7722 was added.
  • A Selection Table section was added.
  • The Pin Assignment diagram was modified.

Revision # 1.80   Modifications made on September 24, 2008

  • In the Features section, Selection Table section and other related sections, the package SOT25 name changed to SOT23-5.
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  • In the Typical Performance Characteristics section, HT7718 series diagram, was modified.
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  • In the Application Circuits, the Inductor type information was added.
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  • The Package Information section was modified.
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  • The Product Tape and Reel Specifications section was modified.

Revision # 1.70   Modifications made on March 13, 2008

  • The Features section was modified.

Revision # 1.60   Modifications made on September 12, 2007

  • In the Features, General Description and other related sections, a new HT7718 (1.8V) device was added.
  • The Electrical Characteristics section was modified.
  • The Test Circuit section was added.
  • The Application Circuits section was modified.

Revision # 1.50   Modifications made on April 23, 2007

  • In the application circuits the Part Number of the Schottky diode has been changed to 1N5817.

Revision # 1.40   Modifications made on April 11, 2007

  • The Application Circuits diagram was modified.

Revision # 1.30   Modifications made on January 16, 2007

  • The Vin values on the Load Transient Response graphs for the HT7727, HT7730, HT7733, HT7737 were modified.

Revision # 1.20   Modifications made on August 29, 2006

  • In the Features, Pin Assignment and other related sections, a 3-pin SOT23 package was added.
  • In the Absolute Maximum Ratings section, the Operating Temperature range was changed from 0oC~70oC to -40oC~85oC and a new title called, Package Thermal Resistance, was added.
  • The Typical Performance Characteristic Graphs have been modified.
  • The Application Circuit capacitors were modified.

Revision # 1.11   Modifications made on July 3, 2006

  • At the Features section, the Low start-up voltage was modified.

Revision # 1.10   Modifications made on March 7, 2006

  • In the Application Circuits, under the SOT-25 diagram a note was added.

Revision # 1.00   This was posted on March 8, 2005

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Product Description
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