P7/7

Rev. B, July 2005

ML65

1. It is recommended to use capacitor with a capacity of 10uF or more for good frequency characteristics, otherwise it will lead

to high output ripple. Tantalum type capacitor is recommended. As there may be the case where a spike-shaped high voltage

is generated by the inductor when Lx transistor is turned off, the operating voltage of capacitor should be at least three times

of the output set voltage so as to avoid over-voltage damage.

2. It is recommended to use inductor has sufficiently small d.c. resistance, large allowable current and hardly reaches magnetic

saturation. When the inductance of inductor is small, there may be the case that the inductor current exceeds the absolute

maximum ratings at the maximum load condition.

3. It is recommended to place external components as close as possible to the DC/DC converter so as to minimize the

converter induced by the switching current level variation during operation. And the insufficient grounding may result in

unstable operation of DC/DC converter.

Application Notes

The information presented in this document does not form part of any quotation or contract, is believed to be accurate and

reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use.