Datasheet

Data Sheet ADP1621
Rev. B | 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