comment on this article

20V synchronous buck controller

A synchronous voltage mode buck controller from National Semiconductor can drive a range of high current point of load applications in printers, telecom, networking and embedded computing.

The LM27402 is described as the industry's most feature rich 20V synchronous buck controller and the first to integrate advanced features into one chip.
An input voltage range of 3V to 20V allows the LM27402 to interface with most intermediate bus voltages, including 3.3V, 5V and 12V rails. Integrated inductor dc resistance current sense eliminates the need for resistive power train elements to detect output current. This increases overall power conversion efficiency and allows accurate continuous current limit sensing. Current sense threshold level is programmable to accommodate a range of load current levels.
Output voltage is adjustable down to 0.6V with a 1% voltage reference providing output voltage set point accuracy over temperatures ranging from -40 to 125°C. An integrated bias supply sub regulator eliminates the external bias voltage supply to simplify pcb layout. Integrated high current mosfet gate drivers with adaptive dead time control enable efficient power conversion with load currents as high as 30A. Other features include programmable soft start, tracking and prebiased startup.
Packaging options are 16pin tssop and 4 x 4 mm LLP.

Author
Graham Pitcher

Comment on this article


This material is protected by MA Business copyright See Terms and Conditions. One-off usage is permitted but bulk copying is not. For multiple copies contact the sales team.

What you think about this article:


Add your comments

Name
 
Email
 
Comments
 

Your comments/feedback may be edited prior to publishing. Not all entries will be published.
Please view our Terms and Conditions before leaving a comment.

Related Articles

Production challenges

The challenges associated with meeting the needs of customers are now extending ...

AC-DC power supplies

XP Power has introduced the LCW series of regulated output cased AC-DC power ...

Get to market faster

A quick look at using Vicor's PFM and AIM in VIA packaging for your AC to Point ...

Digital consciousness

​Would you consider uploading your brain to the cloud if it meant you could ...