ADP1621ARMZ-R7 datasheet(19/32 Pages) AD

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ADP1621

Rev. A | Page 19 of 32

Given the minimum on time of the ADP1621, pulse-skipping

modulation is also a requirement to maintain output voltage

regulation with light loads. During the short switching periods

of pulse-skipping modulation, the MOSFET is turned on for the

minimum on time each cycle, storing just enough energy in the

inductor to charge the output capacitor. During the long period

when the MOSFET is off, no current flows through the inductor,

and the light load current is supplied by the output capacitor.

RECOMMENDED COMPONENT MANUFACTURERS

Table 5.

Vendor

Components

AVX Corporation

Capacitors

Central Semiconductor Corp.

Diodes

Coilcraft, Inc.

Inductors

Diodes, Inc.

Diodes

International Rectifier

Diodes, MOSFETs

Murata Manufacturing Co., Ltd.

Capacitors, inductors

ON Semiconductor

Diodes, MOSFETs

Rubycon Corporation

Capacitors

Sanyo

Capacitors

Sumida

Inductors

Taiyo Yuden, Inc.

Capacitors, inductors

Toko America, Inc.

Inductors

United Chemi-Con, Inc.

Capacitors

Vishay Siliconix

Diodes, MOSFETs, resistors, capacitors

ADP1621ARMZ-R7 Datasheet(PDF) 19 Page - Analog Devices

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