This document discusses the dynamic characteristics of diodes, including charge storage, voltage dependent capacitance, and reverse recovery time. It also highlights the importance of diode forward turn-on time and testing methods, as well as the potential overvoltage stress and IC failure in high-speed switching regulators.
The document details a measurement of the LTM8032 switching step-down regulator's electromagnetic interference (EMI) performance. It describes the test setup, including ambient noise baseline measurements and worst-case emission scenarios occurring at maximum power output.
The results indicate that the LTM8032 meets CISPR 22 Class B limits with a significant margin of approximately 20dB across most of the frequency spectrum for both vertical and horizontal antenna orientations. The regulator is characterized as easy to use and quiet.
| Document Type | Application Note AN122 |
|---|---|
| Product Function | Switching step-down regulator |
| Compliance Standard | CISPR 22 Class B limits |
| Test Condition Input Voltage | 36V |
Yes, it meets these requirements by a wide margin with approximately 20dB of margin for most frequencies.
The test occurred from the maximum input voltage of 36V.