Simple Switcher adds six
01 March 2007
Six high-frequency buck regulators have been added to its Simple Switcher range, by National Semiconductor (www.national.com) The company has also enhanced its Webench, its online design and prototyping environment, with a ‘dial-up’ adjustment to balance footprint and efficiency.
New capabilities have been added to the buck regulators to optimise the regulator for specific design requirements. A patented emulated current- mode technology is embedded in the regulators’ architecture to allow systems and power design engineers to choose voltage and inputs to meet specific requirements. Using the ECM (Emulated Current Mode) operation, the inductor current is emulated by measuring inductor voltage and estimating the current ramp.
The regulators are manufactured in the ABCD-HV process, CMOS logic, HV CMOS for analogue, Bipolar and 120V power DMOS. The versatile DC/DC creates regulators up to 100W. Voltage input ranges from six to 75V and current options are three to 0.5A.
The now includes a dial in the Webench software design tool. When the input voltage and current values are entered, the tool selects a suitable regulator, and the dial graphic is between the footprint and efficiency values. By adjusting the dial, a new regulator can be selected for use in a particular design.
The tool also shows the external components needed for a design and runs electrical and thermal simulations. A custom prototype kit can be dispatched in 48hours.
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