DC/DC Simulation Terms of Use, Usage Guide, and Revision History

Terms of Use

Be sure to thoroughly read and understand the content of “Using this Site” before using technical information provided by our company. Judgments on the validity and applicability of technical information are to be made under the responsibility of the customer.
Please note that the use of this technical information shall be treated as indicating agreement with the Terms of Use.

Usage Guide

Features of this DC/DC Simulator

By calculating the static characteristics of DC/DC converters, this DC/DC simulator can provide design information useful for selecting ICs and peripheral components, and determining the feasibility of circuits.

This simulator possesses the following features which differentiate it from general simulators for DC/DC converters.

  1. Simple operation
  2. Since it is specialized for static characteristics, simulation results can be displayed instantly
  3. Calculation of junction temperature using thermal resistance
  4. Calculation of switching frequency under PFM operation modes
  5. Simulations can be performed with consideration for input resistance (battery impedance)
    Example) Prediction of output current or voltage drop of step-up DC/DCs under conditions which consider battery impedance.
  6. Losses of each component are indicated visually, for simple selection of optimal peripheral components

Procedures for Using this DC/DC Simulator

  1. Select product and switching frequency
    Select the product to be used for the simulation.
    For products which have multiple switching frequencies, select the desired switching frequency.

    After the product and switching frequency have been selected, the default values corresponding to the applicable product and switching frequency will be entered automatically.

  2. Select operating mode
    Next, select the operating mode.

  3. Enter simulation conditions
    Enter the power supply specifications and constants of the peripheral components for the simulation.
    When entering the conditions, refer to the data sheet and enter conditions in a range to fulfill the power supply specifications and result in the recommended constants.

    If the conditions are outside of the power supply specification range or any information is entered using characters other than half-width numerals, the simulation may not operate properly.

Notes for Use

This simulator performs calculations based on DC/DC operating theories with consideration for IC characteristics such as on resistance and quiescent current, but it does not take all possible characteristics into account. It also does not consider phenomena such as abnormal output oscillation or reverse flow of coil current, so there may be some discrepancies between the simulation and actual devices. If using ICs from our company, please carry out verification and testing under actual operating conditions and application environments, and determine the validity and applicability of the information obtained from the simulation.

Revision History

  • Jun 13, 2019 : Version 1.00 released
  • Jun 18, 2019 : Added compatible products
    • - XCL205
    • - XCL210F/H
    • - XCL225/XCL226
    • - XC9220
    • - XC9263/XC9264
    • - XC9267/XC9268
    • - XC9273
  • July 16, 2019 : Improved calculation accuracy by review current consumption formula
  • August 14, 2019 : Added compatible products
    • -XC9281/XC9282 4MHz product
  • ・Added summary display function
  • ・Changed selection method of Switching frequency/Control Method
  • ・Fixed a bug that cannot be simulated under part of conditions
  • November 13, 2019 : Added compatible products
    • -XD9267/XD9268
  • November 22, 2019 : Added compatible products
    • -XCL303/XCL304
  • December 9, 2019 : Corrected calculation when PFM is heavily loaded
  • March 2, 2020 : Added compatible products
    • -XC9276
    • -XCL230/XCL231
  • May 12, 2020 : Added compatible products
    • -XDL605/XDL606
    • -XC9307/XC9308
  • Sep 18, 2020 : Added compatible products
    • -XCL223/XCL224
  • Jan 14, 2021 : Added compatible products
    • -XD9263/XD9264
    • -XDL603/XDL604
  • Jun 2, 2021 : Added compatible products
    • -XC9143/XC9144
  • July 20, 2021 : Added compatible products
    • -XD9707/XD9708
  • Oct 6, 2021:Added compatible products
    • - XCL100
    • ・Increase calculation accuracy by improve current consumption
  • Oct 9, 2021 : Added the function of output error message when inputting non-specification Vin/Vout/Ta.
  • Nov 10,2021:Added compatible products
    • - XC9147/XC9148
  • Jan 13,2022:Added compatible products
    • - XCL232
  • Apr 11,2022:Added compatible products
    • - XC9145
  • Apr 27,2022:Bug fix
    • - Fixed a bug that outputs strange results in control under specific conditions
  • Jul 20,2022
    • - For「NRND」「Discontinued」 products,Product name and status are listed together.
    • - Fixed a bug that calculation cannot be performed normally under specific conditions.
  • Oct 28,2022:Added compatible products
    • - XC9106/XC9107
  • Nov 4,2022
    • -Thermal resistance: θja : Adjusted the initial value of some products