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DC-DC converters are widely used electronic components that convert DC power from one voltage level to another while regulating the output voltage. The output provides a constant voltage to a circuit, regardless of variations in the input voltage or the load current. These power management devices are used in a wide variety of electronic products, including laptops, mobile phones, and instrumentation.
Given the increased pressure to develop products that consume less power and have longer battery life, design engineers need to achieve higher power conversion efficiencies. As a result, numerous measurements are required to characterize the electrical parameters of DC-DC converters. The tests performed include line regulation, load regulation, input and output voltage accuracy, quiescent current, efficiency, turn-on time, ripple, and transient response. Some of these tests require DC test instruments for sourcing and measuring; others require an oscilloscope, and some may require both.
This application note explains how to simplify DC-DC converter testing using a Keithley two-channel Series 2600B System SourceMeter SMU Instrument and a Tektronix MSO/DPO5000 or DPO7000 Series Oscilloscope. The DPOPWR Application Software developed for these scopes supports measurement and analysis of common power management device parameters. Figure 1 illustrates a typical configuration for testing DC-DC converters.

关键词： Simplifying   DC-DC   泰克   SourceMeter