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Retired RETIRED

This product has been retired from our catalog and is no longer for sale.

This page is made available for those looking for datasheets and the simply curious. Please refer to the description to see if a replacement part is available.

Replacement: None. We are no longer offering this IC as a standalone product. This page is for reference only.

Description: The LMZ14203 is a new power module from National Semiconductor and part of their Simple Switcher series. This IC is an easy-to-use step-down DC-DC solution capable of driving up to a 3A load with exceptional power conversion efficiency, line and load regulation, and output accuracy. The innovative TO-PMOD-7 package enhances thermal performance and allows for hand or machine soldering; the pins are each spaced by 1.27mm (0.05").

The LMZ14203 can step-down an input voltage of up to 42V to produce a configurable output voltage between 0.8 and 6V, all at up to 90% efficiency. Only three external resistors, and four capacitors are required to produce a step-down output from the IC. In addition the LMZ14203 provides a number of other features, including: thermal shutdown, input under-voltage lockout, output over-voltage protection, short-circuit protection, output current limit, and allows startup into a pre-biased output.

Features:

  • 18W maximum total output power
  • Up to 3A output current
  • Input voltage range 6V to 42V
  • Output voltage range 0.8V to 6V
  • Efficiency up to 90%
  • Integrated shielded inductor
  • Simple PCB layout
  • Flexible startup sequencing using external soft-start and precision enable
  • Protection against inrush currents and faults such as input UVLO and output short circuit
  • – 40°C to 125°C junction temperature range
  • Single exposed pad and standard pinout for easy mounting and manufacturing
  • Fast transient response for powering FPGAs and ASICs
  • Low output voltage ripple

Dimensions: 0.4 x 0.542 x 0.18 " (10.16 x 13.77 x 4.57 mm)

Documents:

Comments 7 comments

  • When will these be back in stock?

    • Right now :-)

      • I see, just ordered through my importer.
        Where do you find those? In case I need a lot.
        Of course you probably can’t tell me, as you also earn some $$ on selling them, but I’m having a lot of trouble finding them.

  • i want to try to use this on my reprap project but its a little pricy still

  • I would not call it a home run for the cost. A Schottky and an inductor for 3A can be found under $3 for single quantity. I consider these two parts being integrated to be the real bonus.

  • When I spoke with a National Semic. sales rep. recently the other models weren’t quite out yet. I look forward to trying one out soon.
    FOOTPRINT: regarding the footprint, yes, like many other footprints on modern components it’s not the easiest for a hobbyist to deal with, but you must get used to making custom foot prints in your favorite CAD program. It’s just a fact of life.
    On the other hand, I can tell you the package is quite small and very efficient in terms of space and cost. I look forward to trying it out.

  • I like the footprint. This seems very similar in function to TI’s PTN78060 which I’ve used before. It only requires 1 resistor and 2 capacitors and also has 1.5 and 6A versions. The problem with it is it’s size and strange footprint.


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