National’s family of Simple Switcher step-down voltage regulators offers a wide input voltage range from 4.5V to 42V, which allows for wide-voltage transients from 12V and 24V input rails. Internal compensation and small, low pin-count packages simplify the design process and reduce overall system size.

Technical features of the Simple Switcher step-down voltage regulators

The 11 Simple Switcher step-down voltage regulators support a variety of load currents from 0.5A to 5A. Designed with voltage mode control, the family includes the LM22670, LM22671, LM22672, LM22673, LM22674, LM22675, LM22676, LM22677, LM22678, LM22679 and the LM22680.

Each provides a fixed switching frequency at 500 kHz and adjustable switching frequency or frequency synchronization up to 1 MHz which allows for electromagnetic interference (EMI) reduction in noise-sensitive automotive, industrial and communication applications.

Available in an industry-standard 8-pin PSOP package and new 7-pin TO-263 thin package, the step-down voltage regulators also feature adjustable frequency, precision enable, external soft-start and adjustable current limits.

The LM22671 and LM22674 support load currents at 0.5A. For more information or to order samples and an evaluation board: http://www.national.com/pf/LM/LM22671.html and http://www.national.com/pf/LM/LM22674.html.

The LM22672 and LM22675 support load currents at 1A. For more information or to order samples and an evaluation board, visit http://www.national.com/pf/LM/LM22672.html and http://www.national.com/pf/LM/LM22675.html.

The LM22680 supports load currents at 2A. For more information or to order samples, visit http://www.national.com/pf/LM/LM22680.html.

The LM22670, LM22673 and LM22676 support load currents at 3A. For more or to order samples and an evaluation board, visit http://www.national.com/pf/LM/LM22670.html,  http://www.national.com/pf/LM/LM22673.html and http://www.national.com/pf/LM/LM22676.html.

The LM22677, LM22678 and LM22679 support load currents at 5A. For more information or to order samples and an evaluation board, visit http://www.national.com/pf/LM/LM22677.html, http://www.national.com/pf/LM/LM22678.html and http://www.national.com/pf/LM/LM22679.html.

National’s 11 Simple Switcher step-down voltage regulators are pin-to-pin compatible with National’s LM267X series of regulators, which include the LM2670, LM2671, LM2672, LM2673, LM2674, LM2675, LM2676, LM2677, LM2678 and LM2679. More information: www.national.com/switcher.

National’s TO-263 thin package is manufactured from lead-free solder and halogen-free mold compounds. The TO-263 thin package is footprint and PCB drop-in compatible with that of the standard T0-263 package.

Overall package thickness is 50% thinner than standard TO-263 packaging (2.00 mm vs. 4.57 mm).  It features improved moisture sensitivity levels and comparable thermal performance to the standard TO-263 packaging. Available in standard tape-and-reel, and is is approved by the JEDEC JC-11 committee.   

The 11 Simple Switcher step-down voltage regulators  are available now and range in price from $1.24 to $3.25 in 1,000-unit quantities.