Date: 13/04/2011

10 Amp PCB mountable DC/DC converter modules from National Semiconductor

National Semiconductor Corp. has introduced 12 new SIMPLE SWITCHER power modules. National says these devices are the first to drive up to 10A of output current and comply with the CISPR 22 (Class B) radiated and conducted electromagnetic interference (EMI) standard in industrial and communications infrastructure applications.

The key features include:

National's modules include new features for current sharing and frequency synchronization. For high-current intermediate rail and FPGA applications, multiple SIMPLE SWITCHER modules can be placed in parallel to achieve output currents from up to 60A. A synchronization pin enables the modules to operate at the same frequency, controlling switching noise in sensitive systems.

The new SIMPLE SWITCHER power modules are pin-to-pin compatible with other family members. With an integrated shielded inductor, National's 10A power modules operate up to an ambient temperature of 70 degrees C with zero air flow.
These modules are of switching regulator type but work without any external RLC components. All the required devices are embedded inside the module, each featuring precision enable and soft-start pins.

Six of the 12 new SIMPLE SWITCHER power modules accept an input voltage rail between 6V and 36V and deliver an adjustable and highly accurate output voltage from 0.8V to 6V.
The LMZ13608 and LMZ13610 drive up to 8A and 10A of output current, respectively. Featuring similar output currents, the LMZ23608 and LMZ23610 also include frequency synchronization and current sharing.
The LMZ23603 and LMZ23605 drive up to 3A and 5A of output current, respectively, and feature frequency synchronization.

The second set of six new SIMPLE SWITCHER modules accept an input voltage rail between 6V and 20V and deliver an adjustable and highly accurate output voltage from 0.8V to 6V.
The LMZ12008 and LMZ12010 drive up to 8A and 10A of output current, respectively.
Featuring similar output currents, the LMZ22008 and LMZ22010 also include frequency synchronization and current sharing.
The LMZ22003 and LMZ22005 drive up to 3A and 5A of output current, respectively, and feature frequency synchronization.

Packaging, Pricing and Availability:
National's power modules are available now in RoHS-compliant TO-PMOD packages with exposed-bottom pad. Modules up to 5A are offered in a 7-pin, 10.16 mm by 13.77 mm by 4.57 mm package and range in cost from $5.50 to $12.50 in quantities of 1,000. Modules greater than 5A are available in an 11-pin, 15 mm by 17.8 mm by 5.9 mm package and range in cost from $10.93 to $18.00 in quantities of 1,000.

"The very low EMI of National Semiconductor's LMZ23605 solved the switching interference problem we were experiencing with a competitive product," said Peter Algert, hardware engineering manager at LeCroy Corp., a leading provider of oscilloscopes, protocol analyzers and related test and measurement solutions. "The LMZ23605 module not only eliminated the noise problem, but the package with a single die-attach pad was much easier to solder and cool."

In this month Texas instruments and National Semiconductor have agreed to merge.

For more info visit www.national.com