Synchronous buck regulator is simple choice

Edited by the Electronicstalk editorial team Feb 24, 2005

The LM2852 is the first member of the new, high-efficiency Simple Synchronous buck regulator family from National Semiconductor.

The LM2852 is the first member of the new, high-efficiency Simple Synchronous buck regulator family from National Semiconductor.

This low-voltage, high-performance switching regulator is highly integrated to reduce component counts, making it suitable for use in cable and xDSL modems, with digital signal processors, with field programmable gate arrays and in set-top boxes.

The Simple Synchronous family builds on the extensive system deployment of National's well-established Simple Switcher portfolio of convertors, National's flagship power management product family.

National will expand this family throughout 2005 with additional Simple Synchronous regulators with the same input-output voltage range and output currents from 1 to 3A.

"These highly integrated synchronous switchers combine high-efficiency, low-voltage operation and low component count for simplified design", said Paul Greenland, Director of Product Marketing for National Semiconductor's Power Management Group.

"National's new Simple Synchronous products are as quick and easy to use as the rest of our Simple Switcher family, and all external components are fully specified with National's Webench online power supply design tools".

The LM2852 is a synchronous, high-frequency step-down switching voltage regulator capable of driving up to a 2A load with excellent line and load regulation.

The LM2852 can accept an input voltage between 2.7 and 5.5V and deliver a customisable output voltage that is factory-programmable from 0.8 to 3.3V in 100mV increments.

The LM2852 is available with a choice of two switching frequencies, 500kHz and 1.5MHz.

Soft-start and enable functions permit supply sequencing and reduce inrush current.

It also features internal compensation for low component count and simplified design.

The LM2852 is available for simulation on National's Webench design tool.

The LM2852, offered in a thermally enhanced TSSOP-14 package for improved reliability and efficiency, is priced at $2.50 each in 1000-unit quantities.