Title:
SWITCHING REGULATOR AND INTEGRATED CIRCUIT PACKAGE
Document Type and Number:
WIPO Patent Application WO/2018/030230
Kind Code:
A1
Abstract:
Provided is an integrated circuit package which complementarily switches on/off a MOS transistor Q1 (first switch) and MOS transistor Q2 (second switch) in accordance with an output voltage Vout, and which externally outputs a pulse signal having a fixed on-duty D during a step-up/step-down mode. The integrated circuit package has a determination unit 61 for determining the impedance of an external component connected to an external pin P5 that outputs the pulse signal to the exterior during the step-up/step-down mode, and determining whether the external component is a third switch on the basis of the impedance determination result. The integrated circuit package is able to generate a step-down control signal and step-up control signal on the basis of voltage division of an internal power source voltage VDD and on the basis of a ramp voltage VCRG of a slope corresponding to the internal power source voltage VDD, and can be used as one component of a step-up/step-down switching regulator with which the frequency of the step-down control signal and the frequency of the step-up control signal are equivalent.
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Inventors:
HASHIGUCHI SHINGO (JP)
TATEISHI TETSUO (JP)
TATEISHI TETSUO (JP)
Application Number:
PCT/JP2017/028006
Publication Date:
February 15, 2018
Filing Date:
August 02, 2017
Export Citation:
Assignee:
ROHM CO LTD (JP)
International Classes:
H02M3/155
Domestic Patent References:
| WO2017002834A1 | 2017-01-05 |
Foreign References:
| US20150054478A1 | 2015-02-26 | |||
| US20140153197A1 | 2014-06-05 | |||
| JP2015047040A | 2015-03-12 | |||
| JP2010267221A | 2010-11-25 | |||
| JP2007134119A | 2007-05-31 | |||
| US20090262556A1 | 2009-10-22 |
Attorney, Agent or Firm:
SANO PATENT OFFICE (JP)
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