QUICK TAKE:
The company has added six high-frequency buck regulators
to its SIMPLE SWITCHER product family, along with a "dial-in" performance enhancement to its WEBENCH design environment. The regulators feature a combination of high performance, flexibility and ease-of-use for dc/dc power supply
designs. NATIONAL SEMICONDUCTOR, Santa Clara, CA.
(800) 272-9959.
WEBENCH Dial-In Enhancement
National's new buck regulators and enhanced WEBENCH
suite of tools enable novice as well as seasoned power supply designers to easily "dial-in" their size and efficiency
requirements while also realizing fast time to market.
WEBENCH's online electrical and thermal simulations verify
design results, and BuildIt! creates a custom prototype power
supply kit for delivery within 24-48 hours.
MORE INFO:
The regulators operate with an input voltage range up to 75V
and deliver up to 3A of continuous output current. The company's
patented emulated-current-mode technology enhances load transient response in low duty cycle applications not addressable by
traditional current mode control. Operating frequency is
adjustable from 50 kHs to 1 MHz. To reduce EMI, a frequency
synchronization pin is used so that multiple ICs from the family
can self-synchronize to synchronize to an external clock. Other
features are cycle-by-cycle current limit, short-circuit protection and
thermal shut down. The 0.5A LM5574, 1.5A LM5575 and 3.0A
LM5576 buck regulators feature an input voltage range from 6V
to 75V and adjustable switching frequency from 50 kHz to 500
kHz. The 05.A LM25574, 1.5A 25575 and 3.0A LM25576
buck regulators feature an input voltage range from 6V to 42V
and adjustable switching frequency from 50 kHz to 1 MHz. Click on Reader Service at www.eepn.com
PRICING & AVAILABILITY
All six SIMPLE SWITCHER regulators are available now. Prices
range from $1.35 to $2.90 each/1,000.
ON THE WEB
For more information on the regulators or to order samples
and an evaluation board, visit:
http://www.national.com/pf/LM/LM5574.html
http://www.national.com/pf/LM/LM25574.html
http://www.national.com/pf/LM/LM5575.html
http://www.national.com/pf/LM/LM25575.html
http://www.national.com/pf/LM/LM5576.html
http://www.national.com/pf/LM/LM25576.html
